diff --git a/card/extra.js b/card/extra.js
index 2e1873175..64e833867 100644
--- a/card/extra.js
+++ b/card/extra.js
@@ -204,6 +204,7 @@ game.import('card',function(lib,game,ui,get,ai,_status){
 					game.addVideo('cardDialog',null,[get.translation(target)+'展示的手牌',get.cardsInfo(result.cards),event.videoId]);
 					event.card2=result.cards[0];
 					game.log(target,'展示了',event.card2);
+					game.addCardKnower(result.cards, 'everyone');
 					event._result={};
 					player.chooseToDiscard({suit:get.suit(event.card2)},function(card){
 						var evt=_status.event.getParent();
diff --git a/card/guozhan.js b/card/guozhan.js
index 6fca94231..66825621a 100644
--- a/card/guozhan.js
+++ b/card/guozhan.js
@@ -226,18 +226,18 @@ game.import('card',function(lib,game,ui,get,ai,_status){
 						'令'+str+'弃置两张类型不同的手牌',
 						'弃置'+str+'的一张手牌',
 					]).set('ai',()=>{
-						let target=_status.event.getParent().target,hs=target.getCards('h'),type=[];
-						if(hs.length<2) return 0;
+						let target=_status.event.getParent().target,hs=target.getCards('h'),type=[],att=get.attitude(_status.event.player,target);
+						if(hs.length<2) return att>0?1:0;
 						hs.forEach(i=>{
 							type.add(get.type2(i,target));
 						});
 						if(target.identity!=='qun'){
-							if(type.length>1) return 0;
-							return 1;
+							if(Boolean(att>0)===Boolean(type.length>1)) return 1;
+							return 0;
 						}
-						if(type.length<2||target.hp<3) return 1;
-						if(hs.length===2) return 0;
-						return 1;
+						if(type.length<2||target.hp<3) return att>0?1:0;
+						if(hs.length===2) return att>0?0:1;
+						return att>0?1:0;
 					});
 					'step 2'
 					if(result.index==0){
diff --git a/card/gwent.js b/card/gwent.js
index 3a8196304..6402e877d 100644
--- a/card/gwent.js
+++ b/card/gwent.js
@@ -1401,10 +1401,7 @@ game.import('card',function(lib,game,ui,get,ai,_status){
 					result:{
 						target:function(player,current){
 							if(current.hasSkill('gw_qinpendayu')) return 0;
-							if(current.needsToDiscard()) return -1;
-							if(current.needsToDiscard(1)) return -0.7;
-							if(current.needsToDiscard(2)) return -0.4;
-							return -0.1;
+							return Math.max(-1,-0.1-0.3*current.needsToDiscard(2));
 						}
 					},
 					order:1.2,
diff --git a/card/standard.js b/card/standard.js
index 193e0b7bb..1f2001c8d 100644
--- a/card/standard.js
+++ b/card/standard.js
@@ -231,7 +231,7 @@ game.import('card',function(lib,game,ui,get,ai,_status){
 						if(get.cardtag(card,'yingbian_hit')){
 							hit=true;
 							if(targets.some(target=>{
-								return target.mayHaveShan(viewer)&&get.attitude(viewer,target)<0&&get.damageEffect(target,player,viewer,get.natureList(card))>0;
+								return target.mayHaveShan(viewer,'use')&&get.attitude(viewer,target)<0&&get.damageEffect(target,player,viewer,get.natureList(card))>0;
 							})) base+=5;
 						}
 						if(get.cardtag(card,'yingbian_add')){
@@ -241,7 +241,7 @@ game.import('card',function(lib,game,ui,get,ai,_status){
 						}
 						if(get.cardtag(card,'yingbian_damage')){
 							if(targets.some(target=>{
-								return get.attitude(player,target)<0&&(hit||!target.mayHaveShan(viewer)||player.hasSkillTag('directHit_ai',true,{
+								return get.attitude(player,target)<0&&(hit||!target.mayHaveShan(viewer,'use')||player.hasSkillTag('directHit_ai',true,{
 								target:target,
 								card:card,
 								},true))&&!target.hasSkillTag('filterDamage',null,{
@@ -294,7 +294,7 @@ game.import('card',function(lib,game,ui,get,ai,_status){
 								}
 								return -1.5;
 							}();
-							if(!isLink&&target.mayHaveShan()&&!player.hasSkillTag('directHit_ai',true,{
+							if(!isLink&&target.mayHaveShan(player,'use')&&!player.hasSkillTag('directHit_ai',true,{
 								target:target,
 								card:card,
 							},true)) return eff/1.2;
@@ -456,7 +456,9 @@ game.import('card',function(lib,game,ui,get,ai,_status){
 							if(target.hp>0){
 								if(!player.isPhaseUsing()) return 0;
 								let min = 7.2-4*player.hp/player.maxHp,
-									nd = player.needsToDiscard(i=>taos.includes(i)||get.value(i)>=min),
+									nd = player.needsToDiscard(0,(i,player)=>{
+										return !player.canIgnoreHandcard(i)&&(taos.includes(i)||get.value(i)>=min);
+									}),
 									keep = nd?0:2;
 								if(nd>2 || taos.length>1&&(nd>1||nd&&player.hp<1+taos.length) || target.identity==='zhu'&&(nd||target.hp<3)&&(mode==='identity'||mode==='versus'||mode==='chess') || !player.hasFriend()) return 2;
 								if(game.hasPlayer(current=>{
diff --git a/character/collab.js b/character/collab.js
index 8dbdc2285..d6da39b60 100644
--- a/character/collab.js
+++ b/character/collab.js
@@ -256,9 +256,7 @@ game.import('character',function(lib,game,ui,get,ai,_status){
 							var player=_status.event.player;
 							var card={name:button.link[2],nature:button.link[3],isCard:true};
 							if(card.name=='tao'){
-								if(player.hp==1||(player.hp==2&&!player.hasShan())||player.needsToDiscard()){
-									return 5;
-								}
+								if(player.hp==1||(player.hp==2&&!player.hasShan())||player.needsToDiscard()) return 5;
 								return 1;
 							}
 							if(card.name=='sha'){
diff --git a/character/ddd.js b/character/ddd.js
index 205cc432f..91ed345e6 100644
--- a/character/ddd.js
+++ b/character/ddd.js
@@ -5078,12 +5078,8 @@ game.import('character',function(lib,game,ui,get,ai,_status){
 								if(!target.hasFriend()) return;
 								var num=1;
 								if(get.attitude(player,target)>0){
-									if(player.needsToDiscard()){
-										num=0.7;
-									}
-									else{
-										num=0.5;
-									}
+									if(player.needsToDiscard()) num=0.7;
+									else num=0.5;
 								}
 								if(target.hp>=4) return [1,num*2.5];
 								if(target.hp==3) return [1,num*1.5];
diff --git a/character/extra.js b/character/extra.js
index 9d216001a..9cf297567 100755
--- a/character/extra.js
+++ b/character/extra.js
@@ -1012,7 +1012,7 @@ game.import('character',function(lib,game,ui,get,ai,_status){
 							}
 						}
 						var hasRuanshizi=game.hasPlayer(function(target){
-							return target!=player&&player.canUse('sha',target,null,true)&&!target.mayHaveShan()&&get.attitude(player,target)<0&&get.effect(target,{name:'sha'},player,player)>0;
+							return target!=player&&player.canUse('sha',target,null,true)&&!target.mayHaveShan(player,'use')&&get.attitude(player,target)<0&&get.effect(target,{name:'sha'},player,player)>0;
 						})
 						for(var card of hs){
 							var name=get.name(card);
@@ -2216,7 +2216,7 @@ game.import('character',function(lib,game,ui,get,ai,_status){
 									if(target.hasSkillTag('nodamage')||target.hasSkillTag('nothunder')) return 'zeroplayertarget';
 									if(target.hasSkillTag('filterDamage',null,{
 										player:player,
-										card:lib.element.VCard({
+										card:new lib.element.VCard({
 											name:card.name,
 											nature:'thunder'
 										},[card])
diff --git a/character/hearth.js b/character/hearth.js
index afd655c30..dcabef70b 100644
--- a/character/hearth.js
+++ b/character/hearth.js
@@ -804,7 +804,9 @@ game.import('character',function(lib,game,ui,get,ai,_status){
 								return trigger.targets.includes(target);
 							},
 							ai1:function(card){
-								if(!player.needsToDiscard(ui.selected.cards.length)) return 0;
+								if(!player.needsToDiscard(0,(i,player)=>{
+									return !ui.selected.cards.includes(i)&&!player.canIgnoreHandcard(i);
+								})) return 0;
 								if(ui.selected.cards.length>=num2) return 0;
 								return Math.max(5,get.value(trigger.card))-get.value(card)-1;
 							},
diff --git a/character/huicui.js b/character/huicui.js
index 71b693993..a8074ce36 100644
--- a/character/huicui.js
+++ b/character/huicui.js
@@ -4582,7 +4582,7 @@ game.import('character',function(lib,game,ui,get,ai,_status){
 						var d1=true;
 						if(trigger.player.hasSkill('jueqing')||trigger.player.hasSkill('gangzhi')) d1=false
 						for(var target of trigger.targets){
-							if(!target.mayHaveShan()||trigger.player.hasSkillTag('directHit_ai',true,{
+							if(!target.mayHaveShan(player,'use')||trigger.player.hasSkillTag('directHit_ai',true,{
 								target:target,
 								card:trigger.card,
 							},true)){
diff --git a/character/jsrg.js b/character/jsrg.js
index cd589fdc9..574a4836a 100644
--- a/character/jsrg.js
+++ b/character/jsrg.js
@@ -2368,7 +2368,7 @@ game.import('character',function(lib,game,ui,get,ai,_status){
 					result:{
 						target:function(player,target){
 							var eff=get.effect(target,{name:'sha',nature:'fire'},player,target)/30;
-							if(!target.mayHaveShan()) eff*=2;
+							if(!target.mayHaveShan(player,'use')) eff*=2;
 							var del=target.countCards('h')-player.countCards('h')+1.5;
 							eff*=Math.sqrt(del);
 							return eff;
@@ -5060,12 +5060,8 @@ game.import('character',function(lib,game,ui,get,ai,_status){
 								if(!moveCard||!target.hasFriend()) return;
 								var num=1;
 								if(get.attitude(player,target)>0){
-									if(player.needsToDiscard()){
-										num=0.5;
-									}
-									else{
-										num=0.3;
-									}
+									if(player.needsToDiscard()) num=0.5;
+									else num=0.3;
 								}
 								if(target.hp>=4) return [1,num*2];
 								if(target.hp==3) return [1,num*1.5];
@@ -5224,7 +5220,7 @@ game.import('character',function(lib,game,ui,get,ai,_status){
 						if(_status.event.all) return 1;
 						if(ui.selected.buttons.length) return 0;
 						return Math.random();
-					}).set('all',!target.mayHaveShan()&&Math.random()<0.75).set('forceAuto',true);
+					}).set('all',!target.mayHaveShan(player,'use')&&Math.random()<0.75).set('forceAuto',true);
 					'step 1'
 					if(result.bool){
 						var cards=result.cards;
diff --git a/character/mobile.js b/character/mobile.js
index 39265f0a4..86f27f611 100644
--- a/character/mobile.js
+++ b/character/mobile.js
@@ -4306,7 +4306,9 @@ game.import('character',function(lib,game,ui,get,ai,_status){
 							selectCard:(player.getStat('skill').buxu||0)+1,
 							ai1:function(card){
 								var player=_status.event.player;
-								if(player.needsToDiscard()>ui.selected.cards.length) return 10/Math.max(0.1,get.value(card));
+								if(player.needsToDiscard(0,(i,player)=>{
+									return !ui.selected.cards.includes(i)&&!player.canIgnoreHandcard(i);
+								})) return 10/Math.max(0.1,get.value(card));
 								return 5-(player.getStat('skill').buxu||0)-get.value(card);
 							},
 							ai2:()=>1,
@@ -8443,7 +8445,7 @@ game.import('character',function(lib,game,ui,get,ai,_status){
 					]).set('ai',function(){
 						var target=_status.event.getTrigger().target;
 						var player=_status.event.player;
-						var num=target.mayHaveShan()?0:1;
+						var num=target.mayHaveShan(player,'use')?0:1;
 						if(get.attitude(player,target)>0) num=1-num;
 						return num;
 					});
@@ -11316,12 +11318,8 @@ game.import('character',function(lib,game,ui,get,ai,_status){
 								if(!target.hasFriend()) return;
 								var num=1;
 								if(get.attitude(player,target)>0){
-									if(player.needsToDiscard()){
-										num=0.7;
-									}
-									else{
-										num=0.5;
-									}
+									if(player.needsToDiscard()) num=0.7;
+									else num=0.5;
 								}
 								if(target.hp>=4) return [1,num*2];
 								if(target.hp==3) return [1,num*1.5];
diff --git a/character/offline.js b/character/offline.js
index cfebf0d49..6013730e8 100644
--- a/character/offline.js
+++ b/character/offline.js
@@ -170,7 +170,7 @@ game.import('character',function(lib,game,ui,get,ai,_status){
 						d1=true;
 						if(trigger.player.hasSkill('jueqing')||trigger.player.hasSkill('gangzhi')) d1=false;
 						for(var target of trigger.targets){
-							if(!target.mayHaveShan()||trigger.player.hasSkillTag('directHit_ai',true,{
+							if(!target.mayHaveShan(player,'use')||trigger.player.hasSkillTag('directHit_ai',true,{
 								target:target,
 								card:trigger.card,
 							},true)){
@@ -299,7 +299,7 @@ game.import('character',function(lib,game,ui,get,ai,_status){
 						var effect=0;
 						for(var target of trigger.targets){
 							var eff=get.effect(target,trigger.card,trigger.player,player);
-							if(!target.mayHaveShan()||trigger.player.hasSkillTag('directHit_ai',true,{
+							if(!target.mayHaveShan(player,'use')||trigger.player.hasSkillTag('directHit_ai',true,{
 								target:target,
 								card:trigger.card,
 							},true)){
@@ -765,7 +765,7 @@ game.import('character',function(lib,game,ui,get,ai,_status){
 									if(target.hasSkillTag('nodamage')||target.hasSkillTag('nothunder')) return 'zeroplayertarget';
 									if(target.hasSkillTag('filterDamage',null,{
 										player:player,
-										card:lib.element.VCard({
+										card:new lib.element.VCard({
 											name:card.name,
 											nature:'thunder'
 										},[card])
@@ -4906,7 +4906,7 @@ game.import('character',function(lib,game,ui,get,ai,_status){
 						}
 						//护驾
 						else if(!player.hasShan()&&game.hasPlayer(function(current){
-							return current!=player&&current.group=='wei'&&current.mayHaveShan()&&get.attitude(player,current)>0&&get.attitude(current,player)>0;
+							return current!=player&&current.group=='wei'&&current.mayHaveShan(player,'respond')&&get.attitude(player,current)>0&&get.attitude(current,player)>0;
 						})) return 1;
 						return -1;
 					});
@@ -4940,7 +4940,7 @@ game.import('character',function(lib,game,ui,get,ai,_status){
 								}
 								//护驾
 								else if(!player.hasShan()&&game.hasPlayer(function(current){
-									return current!=player&&current.group=='wei'&&current.mayHaveShan()&&get.attitude(player,current)>0&&get.attitude(current,player)>0;
+									return current!=player&&current.group=='wei'&&current.mayHaveShan(player,'respond')&&get.attitude(player,current)>0&&get.attitude(current,player)>0;
 								})) return 'hujia';
 							});
 						}
diff --git a/character/refresh.js b/character/refresh.js
index e2cdd8732..a4afec844 100755
--- a/character/refresh.js
+++ b/character/refresh.js
@@ -6510,7 +6510,9 @@ game.import('character',function(lib,game,ui,get,ai,_status){
 							},
 							true
 						)) return 6.5 - get.value(card, player);
-						if (Math.random() * target.countCards('hs') < 1 || player.needsToDiscard(-ui.selected.cards.length)) return 6 - get.value(card, player);
+						if (Math.random() * target.countCards('hs') < 1 || player.needsToDiscard(0,(i,player)=>{
+							return !ui.selected.cards.includes(i)&&!player.canIgnoreHandcard(i);
+						})) return 6 - get.value(card, player);
 						return 0;
 					}
 					return 6.3 - get.value(card);
@@ -11122,7 +11124,7 @@ game.import('character',function(lib,game,ui,get,ai,_status){
 					useShan:true,
 					effect:{
 						target:function(card,player,target,current){
-							let name='sha';
+							let name;
 							if(typeof card=='object'){
 								if(card.viewAs) name=card.viewAs;
 								else name=get.name(card);
@@ -11766,12 +11768,8 @@ game.import('character',function(lib,game,ui,get,ai,_status){
 								if(!target.hasFriend()) return;
 								var num=1;
 								if(get.attitude(player,target)>0){
-									if(player.needsToDiscard()){
-										num=0.7;
-									}
-									else{
-										num=0.5;
-									}
+									if(player.needsToDiscard()) num=0.7;
+									else num=0.5;
 								}
 								if(player.hp>=4) return [1,num*2];
 								if(target.hp==3) return [1,num*1.5];
@@ -12108,7 +12106,7 @@ game.import('character',function(lib,game,ui,get,ai,_status){
 							return player!=target;
 						},
 						ai1:function(card){
-							if(get.attitude(_status.event.player,_status.currentPhase)<0&&_status.currentPhase.needsToDiscard()&&card.name!='du') return -1;
+							if(card.name!='du'&&get.attitude(_status.event.player,_status.currentPhase)<0&&_status.currentPhase.needsToDiscard()) return -1;
 							for(var i=0;i<ui.selected.cards.length;i++){
 								if(get.type(ui.selected.cards[i])==get.type(card)||(ui.selected.cards[i].name=='du'&&card.name!='du')) return -1;
 							}
@@ -13665,12 +13663,8 @@ game.import('character',function(lib,game,ui,get,ai,_status){
 								if(!target.hasFriend()) return;
 								var num=1;
 								if(get.attitude(player,target)>0){
-									if(player.needsToDiscard()){
-										num=0.7;
-									}
-									else{
-										num=0.5;
-									}
+									if(player.needsToDiscard()) num=0.7;
+									else num=0.5;
 								}
 								if(player.hp>=4) return [1,num*2];
 								if(target.hp==3) return [1,num*1.5];
diff --git a/character/sp.js b/character/sp.js
index 61bb1c238..907475367 100755
--- a/character/sp.js
+++ b/character/sp.js
@@ -5162,10 +5162,10 @@ game.import('character',function(lib,game,ui,get,ai,_status){
 								}
 								return -1.5;
 							}();
-							if(!isLink && target.mayHaveShan() && !player.hasSkillTag('directHit_ai', true, {
+							if(!isLink && target.mayHaveShan(player,'use') && !player.hasSkillTag('directHit_ai', true, {
 								target: target,
 								card: card
-							}, true)) return eff / 1.2;
+							}, true)) return eff * 0.6;
 							return eff;
 						}
 					},
@@ -6954,7 +6954,7 @@ game.import('character',function(lib,game,ui,get,ai,_status){
 						}
 						else{
 							var target=trigger.target;
-							if(trigger.targets.length>1||target.mayHaveShan()) return 0;
+							if(trigger.targets.length>1||target.mayHaveShan(player,'use')) return 0;
 						}
 						var num=trigger.getParent().baseDamage;
 						var map=trigger.getParent().customArgs,id=target.playerid;
@@ -14460,12 +14460,12 @@ game.import('character',function(lib,game,ui,get,ai,_status){
 								if(num>=delta) return 'zeroplayertarget';
 							}
 							else if(get.tag(card,'respondShan')>0){
-								if(current<0&&used==target.getAttackRange()-1&&target.mayHaveShan()){
+								if(current<0&&used==target.getAttackRange()-1&&target.mayHaveShan(player)){
 									return 0.6;
 								}
 							}
 							else if(get.tag(card,'respondSha')>0){
-								if(current<0&&used==target.getAttackRange()-1&&target.mayHaveSha()){
+								if(current<0&&used==target.getAttackRange()-1&&target.mayHaveSha(player)){
 									return 0.6;
 								}
 							}
@@ -15204,17 +15204,13 @@ game.import('character',function(lib,game,ui,get,ai,_status){
 						return target!=player;
 					}).set('ai',function(target){
 						if(target.hasJudge('lebu')) return 0;
-						var att=get.attitude(_status.event.player,target);
+						let att=get.attitude(_status.event.player,target),name=_status.event.cards[0].name;
 						if(att<3) return 0;
 						if(target.hasSkillTag('nogain')) att/=10;
-						if(target.hasSha()&&_status.event.sha){
-							att/=5;
-						}
-						if(event.wuxie&&target.needsToDiscard(1)){
-							att/=5;
-						}
+						if(name==='sha'&&target.hasSha()) att/=5;
+						if(name==='wuxie'&&target.needsToDiscard(_status.event.cards)) att/=5;
 						return att/(1+get.distance(player,target,'absolute'));
-					}).set('sha',trigger.cards[0].name=='sha').set('wuxie',trigger.cards[0].name=='wuxie');
+					}).set('cards',trigger.cards);
 					'step 1'
 					if(result.bool){
 						player.logSkill('yingyuan',result.targets[0]);
@@ -15288,19 +15284,21 @@ game.import('character',function(lib,game,ui,get,ai,_status){
 							if(_status.event.du) return -get.value(card,player,'raw');
 							else if(_status.event.shuimeng){
 								if(cardname=='wuzhong'){
-									if(player.needsToDiscard(2-ui.selected.cards.length)){
-										return 10-get.value(card,player,'raw');
-									}
+									if(player.needsToDiscard(2,(i,player)=>{
+										return !ui.selected.cards.includes(i)&&!player.canIgnoreHandcard(i);
+									})) return 10-get.value(card,player,'raw');
 								}
 								else if(cardname=='guohe'){
-									if(player.needsToDiscard(-1-ui.selected.cards.length)){
-										return 10-get.value(card,player,'raw');
-									}
+									if(player.needsToDiscard(-1,(i,player)=>{
+										return !ui.selected.cards.includes(i)&&!player.canIgnoreHandcard(i);
+									})) return 10-get.value(card,player,'raw');
 								}
 								return 0;
 							}
 							else if(cardname=='lebu'){
-								if(player.needsToDiscard(1-ui.selected.cards.length)){
+								if(player.needsToDiscard(1,(i,player)=>{
+									return !ui.selected.cards.includes(i)&&!player.canIgnoreHandcard(i);
+								})){
 									return 8-get.value(card,player,'raw');
 								}
 								else{
@@ -17480,9 +17478,7 @@ game.import('character',function(lib,game,ui,get,ai,_status){
 						return 20-num;
 					}
 					else{
-						if(_status.event.player.needsToDiscard()){
-							return 7-num;
-						}
+						if(_status.event.player.needsToDiscard()) return 7-num;
 					}
 					return 0;
 				},
diff --git a/character/sp2.js b/character/sp2.js
index 7b86152f6..0ce51ba2c 100644
--- a/character/sp2.js
+++ b/character/sp2.js
@@ -5015,7 +5015,7 @@ game.import('character',function(lib,game,ui,get,ai,_status){
 								})) return 3;
 								return Math.sqrt(target.countCards('he'));
 							}
-							if(target.mayHaveShan()&&player.countCards('hs',function(card){
+							if(target.mayHaveShan(player,'use')&&player.countCards('hs',function(card){
 								return !ui.selected.cards.includes(card)&&get.name(card)=='sha'&&player.canUse(card,target)&&get.effect(target,card,player,player)!=0;
 							})) return -Math.sqrt(Math.abs(get.attitude(player,target)))/2;
 							return 0.1;
@@ -5347,7 +5347,7 @@ game.import('character',function(lib,game,ui,get,ai,_status){
 					player.addSkill('mouni2');
 					player.chooseTarget(get.prompt2('mouni'),lib.filter.notMe).set('ai',function(target){
 						var player=_status.event.player,cards=player.getCards('h','sha');
-						if(get.attitude(player,target)>=0||!player.canUse(cards[0],target,false)||(!player.hasJudge('lebu')&&target.mayHaveShan()&&!player.hasSkillTag('directHit_ai',true,{
+						if(get.attitude(player,target)>=0||!player.canUse(cards[0],target,false)||(!player.hasJudge('lebu')&&target.mayHaveShan(player,'use')&&!player.hasSkillTag('directHit_ai',true,{
 							target:target,
 							card:cards[0],
 						},true))) return 0;
diff --git a/character/tw.js b/character/tw.js
index 6685e8169..20a28e814 100644
--- a/character/tw.js
+++ b/character/tw.js
@@ -384,7 +384,7 @@ game.import('character',function(lib,game,ui,get,ai,_status){
 					}).set('goon',function(){
 						var d1=true;
 						if(player.hasSkill('jueqing')||player.hasSkill('gangzhi')) d1=false;
-						if(!target.mayHaveShan()||player.hasSkillTag('directHit_ai',true,{
+						if(!target.mayHaveShan(player,'use')||player.hasSkillTag('directHit_ai',true,{
 							target:target,
 							card:trigger.card,
 						},true)){
@@ -2985,7 +2985,7 @@ game.import('character',function(lib,game,ui,get,ai,_status){
 					expose:0.2,
 					result:{
 						target:function(player,target){
-							if(target.countCards('h')<=target.hp&&!target.mayHaveShan()&&get.effect(target,{name:'sha',isCard:true},player,player)>0) return -1;
+							if(target.countCards('h')<=target.hp&&!target.mayHaveShan(player,'use')&&get.effect(target,{name:'sha',isCard:true},player,player)>0) return -1;
 							else if(target.countCards('h')>target.hp&&target.hp>2&&target.hasShan()) return 1;
 							return 0;
 						},
@@ -6572,7 +6572,7 @@ game.import('character',function(lib,game,ui,get,ai,_status){
 						var player=_status.event.player;
 						if(player.hp+player.countCards('hs',{name:['tao','jiu']})<=1) return -1;
 						var num=1;
-						if((!target.mayHaveShan()||player.hasSkillTag('directHit_ai',true,{
+						if((!target.mayHaveShan(player,'use')||player.hasSkillTag('directHit_ai',true,{
 							target:target,
 							card:{name:'sha'},
 						},true))&&!target.hasSkillTag('filterDamage',null,{
@@ -11090,7 +11090,7 @@ game.import('character',function(lib,game,ui,get,ai,_status){
 								var d1=true;
 								if(trigger.player.hasSkill('jueqing')||trigger.player.hasSkill('gangzhi')) d1=false;
 								for(var target of trigger.targets){
-									if(!target.mayHaveShan()||trigger.player.hasSkillTag('directHit_ai',true,{
+									if(!target.mayHaveShan(player,'use')||trigger.player.hasSkillTag('directHit_ai',true,{
 										target:target,
 										card:trigger.card,
 									},true)){
@@ -13290,7 +13290,7 @@ game.import('character',function(lib,game,ui,get,ai,_status){
 						var d1=true;
 						if(trigger.player.hasSkill('jueqing')||trigger.player.hasSkill('gangzhi')) d1=false
 						for(var target of trigger.targets){
-							if(!target.mayHaveShan()||trigger.player.hasSkillTag('directHit_ai',true,{
+							if(!target.mayHaveShan(player,'use')||trigger.player.hasSkillTag('directHit_ai',true,{
 								target:target,
 								card:trigger.card,
 							},true)){
diff --git a/character/xianding.js b/character/xianding.js
index c66d1f949..6024a533f 100644
--- a/character/xianding.js
+++ b/character/xianding.js
@@ -277,7 +277,7 @@ game.import('character',function(lib,game,ui,get,ai,_status){
 				filter:function(event,player){
 					if(!player.getHp()) return false;
 					if(event.name=='loseAsync'&&event.type!='gain') return false;
-					var cards1=event.getl(player).cards2,cards2=cards=event.getg(player);
+					var cards1=event.getl(player).cards2,cards2=event.getg(player);
 					return (!player.hasSkill('dcsbmengmou_true')&&game.hasPlayer(function(current){
 						if(current==player) return false;
 						var cardsx=event.getg(current);
@@ -3334,10 +3334,9 @@ game.import('character',function(lib,game,ui,get,ai,_status){
 								if(num>0&&!player._dczhizhe_mod&&get.itemtype(card)==='card'&&card.hasGaintag('dczhizhe')){
 									if(player.canIgnoreHandcard(card)) return Infinity;
 									player._dczhizhe_mod=true;
-									if(player.hp<3&&player.needsToDiscard(player.countCards('h',(cardx)=>{
-										if(player.canIgnoreHandcard(cardx)||get.useful(cardx)>6) return true;
-										return false;
-									}))) return num*1.5;
+									if(player.hp<3&&player.needsToDiscard(0,(i,player)=>{
+										return !player.canIgnoreHandcard(i)&&get.useful(i)>6;
+									})) return num*1.5;
 									return num*10;
 								}
 							}
@@ -3525,12 +3524,8 @@ game.import('character',function(lib,game,ui,get,ai,_status){
 										if(!target.hasFriend()) return;
 										var num=1;
 										if(get.attitude(player,target)>0){
-											if(player.needsToDiscard()){
-												num=0.5;
-											}
-											else{
-												num=0.3;
-											}
+											if(player.needsToDiscard()) num=0.5;
+											else num=0.3;
 										}
 										if(target.hp>=4) return [1,num*2];
 										if(target.hp==3) return [1,num*1.5];
@@ -3844,12 +3839,8 @@ game.import('character',function(lib,game,ui,get,ai,_status){
 								if(!target.hasFriend()) return;
 								var num=1;
 								if(get.attitude(player,target)>0){
-									if(player.needsToDiscard()){
-										num=0.7;
-									}
-									else{
-										num=0.5;
-									}
+									if(player.needsToDiscard()) num=0.7;
+									else num=0.5;
 								}
 								if(target.hp==2&&target.hasFriend()) return [1,num*1.5];
 								if(target.hp>=2) return [1,num];
@@ -8268,7 +8259,9 @@ game.import('character',function(lib,game,ui,get,ai,_status){
 						if(current==player||current.countCards('he')==0) return false;
 						return get.effect(current,{name:'guohe_copy2'},player,player)+get.effect(current,{name:'sha'},player,player)>0;
 					})){
-						if(get.position(card)=='h'&&player.needsToDiscard()>ui.selected.cards.length) return 7+1/Math.max(1,get.value(card));
+						if(get.position(card)=='h'&&player.needsToDiscard(0,(i,player)=>{
+							return !ui.selected.cards.includes(i)&&!player.canIgnoreHandcard(i);
+						})) return 7+1/Math.max(1,get.value(card));
 						return 7-get.value(card);
 					}
 					return 0;
diff --git a/character/xianjian.js b/character/xianjian.js
index c1f6c8dc1..a6048e5e0 100644
--- a/character/xianjian.js
+++ b/character/xianjian.js
@@ -653,9 +653,7 @@ game.import('character',function(lib,game,ui,get,ai,_status){
 						player.chooseTarget('将'+get.translation(result.links)+'交给一名角色',true).ai=function(target){
 							var att=get.attitude(player,target)/Math.sqrt(target.countCards('h')+1);
 							if(result.links.length>1){
-								if(target==player&&target.needsToDiscard(result.links.length)>1){
-									return att/5;
-								}
+								if(target==player&&target.needsToDiscard(result.links)>1) return att/5;
 								return att;
 							}
 							else{
@@ -1241,7 +1239,7 @@ game.import('character',function(lib,game,ui,get,ai,_status){
 						}
 						return false;
 					}).ai=function(target){
-						var num=0,eff=0,damaged=false;
+						var use=[],eff=0,damaged=false;
 						for(var i=0;i<hs.length;i++){
 							if(get.info(hs[i]).multitarget) continue;
 							var hef;
@@ -1252,7 +1250,7 @@ game.import('character',function(lib,game,ui,get,ai,_status){
 								hef=get.effect(target,hs[i],player,player);
 							}
 							if(lib.filter.targetEnabled2(hs[i],player,target)&&hef>0){
-								num++;
+								use.push(hs[i]);
 								if(get.attitude(player,target)>0){
 									hef/=1.5;
 									if(get.tag(hs[i],'damage')){
@@ -1262,9 +1260,9 @@ game.import('character',function(lib,game,ui,get,ai,_status){
 								eff+=hef;
 							}
 						}
-						if(!player.needsToDiscard(-num)){
-							return eff;
-						}
+						if(!player.needsToDiscard(0,(i,player)=>{
+							return !use.includes(i)&&!player.canIgnoreHandcard(i);
+						})) return eff;
 						return 0;
 					};
 					'step 1'
diff --git a/character/xinghuoliaoyuan.js b/character/xinghuoliaoyuan.js
index 47ddce3a1..2cd815872 100755
--- a/character/xinghuoliaoyuan.js
+++ b/character/xinghuoliaoyuan.js
@@ -1371,19 +1371,13 @@ game.import('character',function(lib,game,ui,get,ai,_status){
 						if(target==player) return false;
 						return target.countCards('h')>player.countCards('h')||Math.max(0,target.hp)>Math.max(0,player.hp);
 					}).set('ai',function(target){
-						var att=get.attitude(_status.event.player,target);
+						let att=get.attitude(_status.event.player,target),name=_status.event.cards[0].name;
 						if(att<3) return 0;
-						if(target.hasJudge('lebu')){
-							att/=5;
-						}
-						if(target.hasSha()&&_status.event.sha){
-							att/=5;
-						}
-						if(_status.event.wuxie&&target.needsToDiscard(1)){
-							att/=5;
-						}
+						if(target.hasJudge('lebu')) att/=5;
+						if(name==='sha'&&target.hasSha()) att/=5;
+						if(name==='wuxie'&&target.needsToDiscard(_status.event.cards)) att/=5;
 						return att/(1+get.distance(player,target,'absolute'));
-					}).set('sha',trigger.cards[0].name=='sha').set('wuxie',trigger.cards[0].name=='wuxie');
+					}).set('cards',trigger.cards);
 					'step 1'
 					if(result.bool){
 						var list=[];
diff --git a/character/yijiang.js b/character/yijiang.js
index 23d44cfbd..3a54d326b 100755
--- a/character/yijiang.js
+++ b/character/yijiang.js
@@ -2101,7 +2101,7 @@ game.import('character',function(lib,game,ui,get,ai,_status){
 							if(num>2) return true;
 							var card=trigger.card;
 							if(get.tag(card,'damage')&&player.hp<=trigger.getParent().baseDamage&&(!get.tag(card,'respondShan')||!player.hasShan())&&(!get.tag(card,'respondSha')||!player.hasSha())) return true;
-							var source=_status.currentPhase,todis=(source.countCards('h')-Math.max(0,source.needsToDiscard()));
+							var source=_status.currentPhase,todis=source.countCards('h')-source.needsToDiscard();
 							if(todis<=Math.max(Math.min(2+(source.hp<=1?1:0),player.countCards('he',function(card){
 								return get.value(card,player)<Math.max(5.5,8-todis)
 							})),player.countCards('he',function(card){
@@ -2235,7 +2235,7 @@ game.import('character',function(lib,game,ui,get,ai,_status){
 							case 2:{
 								var num=1.3;
 								if(event.card.name=='sha'&&event.targets.filter(function(current){
-									if(current.mayHaveShan()&&get.attitude(player,current)<=0){
+									if(current.mayHaveShan(player,'use')&&get.attitude(player,current)<=0){
 										if(current.hasSkillTag('useShan')) num=1.9;
 										return true;
 									}
@@ -6980,8 +6980,7 @@ game.import('character',function(lib,game,ui,get,ai,_status){
 					effect:{
 						player:function(card,player,target){
 							if(_status.currentPhase!=player) return;
-							if(card.name=='sha'&&!player.needsToDiscard()&&
-								!player.getExpansions('chunlao').length&&target.hp>1){
+							if(card.name=='sha'&&!player.needsToDiscard()&&!player.getExpansions('chunlao').length&&target.hp>1){
 								return 'zeroplayertarget';
 							}
 						}
diff --git a/mode/guozhan.js b/mode/guozhan.js
index b403277e4..77e917ac8 100644
--- a/mode/guozhan.js
+++ b/mode/guozhan.js
@@ -3528,7 +3528,7 @@ game.import('mode',function(lib,game,ui,get,ai,_status){
 					]).set('prompt',get.prompt('gzliegong',trigger.target)).setHiddenSkill('gzliegong').set('ai',function(){
 						var player=_status.event.player,target=_status.event.getTrigger().target;
 						if(get.attitude(player,target)>0) return 2;
-						return target.mayHaveShan()?1:0;
+						return target.mayHaveShan(player,'use')?1:0;
 					});
 					'step 1'
 					if(result.control!='cancel2'){
@@ -10654,7 +10654,7 @@ game.import('mode',function(lib,game,ui,get,ai,_status){
 									goon=false;
 								}
 								else if(trigger.card.name=='sha'){
-									if(trigger.target.mayHaveShan()||trigger.target.hp>=3){
+									if(trigger.target.mayHaveShan(player,'use')||trigger.target.hp>=3){
 										goon=false;
 									}
 								}
diff --git a/noname/library/element/player.js b/noname/library/element/player.js
index c331ec348..0b072c4b6 100644
--- a/noname/library/element/player.js
+++ b/noname/library/element/player.js
@@ -7713,20 +7713,25 @@ export class Player extends HTMLDivElement {
 		}
 		return false;
 	}
-	needsToDiscard(filter, add) {
+	needsToDiscard(add, filter, pure) {
 		/**
-		 * filter: typeof 'number' -> 额外摸等量牌(逻辑上)
-		 *         typeof 'function' -> 只考虑符合函数筛选的牌
-		 * add: 额外获得这张/些牌(逻辑上)
+		 * add: (逻辑上)同时考虑“获得”的这张/些牌
+		 * filter(function): 代替默认策略进行筛选
+		 * pure: 返回值可以为负数
 		 */
-		let cards = this.getCards('h', card => !this.canIgnoreHandcard(card)), num = 0;
-		if (get.itemtype(add) === 'cards') cards.addArray(add);
+		let cards = this.getCards('h'), num = 0;
+		if (typeof add === 'number') num = add;
+		else if (get.itemtype(add) === 'cards') for (let i of add) {
+			cards.push(add);
+		}
 		else if (get.itemtype(add) === 'card') cards.push(add);
-		if (typeof filter === 'number') num = filter;
-		else if (typeof filter === 'function') cards = cards.filter(card => {
-			return filter(card);
+		if (typeof filter !== 'function') filter = (card, player) => !player.canIgnoreHandcard(card);
+		cards = cards.filter(card => {
+			return filter(card, this, cards);
 		});
-		return Math.max(0, num + cards.length - this.getHandcardLimit());
+		num += cards.length - this.getHandcardLimit();
+		if (pure) return num;
+		return Math.max(0, num);
 	}
 	distanceTo(target, method) {
 		return get.distance(this, target, method);
@@ -7899,12 +7904,12 @@ export class Player extends HTMLDivElement {
 			else return true;
 		}
 		if (get.itemtype(viewer) !== 'player') viewer = _status.event.player;
-		let cards, selected = get.copy(ui.selected.cards);
+		let cards, selected = [];
 		if (get.itemtype(ignore) === 'cards') selected.addArray(ignore);
 		else if (get.itemtype(ignore) === 'card') selected.add(ignore);
 		if (this === viewer || get.itemtype(viewer) == 'player') cards = this.getKnownCards(viewer);
 		else cards = this.getShownCards();
-		count += cards.filter(card => {
+		cards = cards.filter(card => {
 			if (selected.includes(card)) return false;
 			let name = get.name(card, this);
 			if (name == 'sha' || name == 'hufu' || name == 'yuchanqian') {
@@ -7913,9 +7918,10 @@ export class Player extends HTMLDivElement {
 				return true;
 			}
 			return false;
-		}).length;
+		});
+		count += cards.length;
 		if (count && rvt !== 'count') return true;
-		let hs = this.getCards('hs').filter(i => !cards.includes(i) && !selected.includes(i)).length;
+		let hs = this.getCards('hs').filter(i => !cards.includes(i)).length;
 		if (!hs) {
 			if (rvt === 'count') return count;
 			return false;
@@ -7941,12 +7947,12 @@ export class Player extends HTMLDivElement {
 			else return true;
 		}
 		if (get.itemtype(viewer) !== 'player') viewer = _status.event.player;
-		let cards, selected = get.copy(ui.selected.cards);
+		let cards, selected = [];
 		if (get.itemtype(ignore) === 'cards') selected.addArray(ignore);
 		else if (get.itemtype(ignore) === 'card') selected.add(ignore);
 		if (this === viewer || get.itemtype(viewer) == 'player') cards = this.getKnownCards(viewer);
 		else cards = this.getShownCards();
-		count += cards.filter(card => {
+		cards = cards.filter(card => {
 			if (selected.includes(card)) return false;
 			let name = get.name(card, this);
 			if (name === 'shan' || name === 'hufu') {
@@ -7955,9 +7961,10 @@ export class Player extends HTMLDivElement {
 				return true;
 			}
 			return false;
-		}).length;
+		});
+		count += cards.length;
 		if (count && rvt !== 'count') return true;
-		let hs = this.getCards('hs').filter(i => !cards.includes(i) && !selected.includes(i)).length;
+		let hs = this.getCards('hs').filter(i => !cards.includes(i)).length;
 		if (!hs) {
 			if (rvt === 'count') return count;
 			return false;
diff --git a/noname/library/index.js b/noname/library/index.js
index acf125aff..0a2f0f0f9 100644
--- a/noname/library/index.js
+++ b/noname/library/index.js
@@ -10311,7 +10311,7 @@ export class Library extends Uninstantable {
 						if (game.hasPlayer(current => {
 							if (!player.canUse(card, current)) return false;
 							const storage = player.storage, zhibi = storage.zhibi;
-							return (zhibi && !zhibi.includes(current) || (get.effect(current, card, player, player) >= 2 - Math.max(0, (storage.stratagem_fury || 0) - 1))) && current.mayHaveShan() && player.hasSkill('jiu');
+							return (zhibi && !zhibi.includes(current) || get.effect(current, card, player, player) >= 2 - Math.max(0, (storage.stratagem_fury || 0) - 1)) && current.mayHaveShan(player, 'use') && player.hasSkill('jiu');
 						})) return 1;
 						return 0;
 					}
@@ -10382,7 +10382,7 @@ export class Library extends Uninstantable {
 							if (game.hasPlayer(current => {
 								if (!player.canUse(card, current)) return false;
 								const storage = player.storage, zhibi = storage.zhibi;
-								return (zhibi && !zhibi.includes(current) || (get.effect(current, card, player, player) >= 2 - Math.max(0, (storage.stratagem_fury || 0) - 1))) && current.mayHaveShan();
+								return (zhibi && !zhibi.includes(current) || (get.effect(current, card, player, player) >= 2 - Math.max(0, (storage.stratagem_fury || 0) - 1))) && current.mayHaveShan(player, 'use');
 							})) return get.order(card, player) + 0.5;
 						}
 						else if (cardName == 'tao' && player.hp <= 2 && player.getDamagedHp() >= 2) return get.order(card, player) + 0.5;