diff --git a/lua/core/skill_type/trigger.lua b/lua/core/skill_type/trigger.lua
index 71a4d388..6dd76167 100644
--- a/lua/core/skill_type/trigger.lua
+++ b/lua/core/skill_type/trigger.lua
@@ -49,10 +49,9 @@ end
 ---@param data any # useful data of the event
 ---@return boolean # returns true if trigger is broken
 function TriggerSkill:trigger(event, target, player, data)
-    print(string.format("%s triggered: event=%d", self.name, event))
-    --if player.room:askForSkillInvoke(self.name) then
-    --    return self:use(event, target, player, data)
-    --end
+    if player.room:askForSkillInvoke(player, self.name) then
+        return self:use(event, target, player, data)
+    end
     return false
 end
 
diff --git a/lua/server/gamelogic.lua b/lua/server/gamelogic.lua
index b6c5c83f..2986e0b9 100644
--- a/lua/server/gamelogic.lua
+++ b/lua/server/gamelogic.lua
@@ -249,7 +249,7 @@ function GameLogic:trigger(event, target, data)
             end
 
             while #skill_names > 0 do
-                local skill_name = room:askForChoice(player, skill_names)
+                local skill_name = room:askForChoice(player, skill_names, "trigger")
                 local skill = triggerables[table.indexOf(skill_names, skill_name)]
                 broken = skill:trigger(event, target, player, data)
                 if broken then break end
diff --git a/lua/server/room.lua b/lua/server/room.lua
index e124b417..4bb24f4d 100644
--- a/lua/server/room.lua
+++ b/lua/server/room.lua
@@ -220,8 +220,28 @@ end
 
 ---@param player ServerPlayer
 ---@param choices string[]
-function Room:askForChoice(player, choices)
-    return choices[1]
+---@param skill_name string
+function Room:askForChoice(player, choices, skill_name, data)
+    if #choices == 1 then return choices[1] end
+    local command = "AskForChoice"
+    self:notifyMoveFocus(player, skill_name)
+    local result = self:doRequest(player, command, json.encode{
+        choices, skill_name
+    })
+    if result == "" then result = choices[1] end
+    return result
+end
+
+---@param player ServerPlayer
+---@param skill_name string
+---@return boolean
+function Room:askForSkillInvoke(player, skill_name, data)
+    local command = "AskForSkillInvoke"
+    self:notifyMoveFocus(player, skill_name)
+    local invoked = false
+    local result = self:doRequest(player, command, skill_name)
+    if result ~= "" then invoked = true end
+    return invoked
 end
 
 fk.room_callback["QuitRoom"] = function(jsonData)
diff --git a/packages/standard/game_rule.lua b/packages/standard/game_rule.lua
index a1e55575..8b398599 100644
--- a/packages/standard/game_rule.lua
+++ b/packages/standard/game_rule.lua
@@ -10,4 +10,13 @@ GameRule = fk.CreateTriggerSkill{
         return (target == player) or (target == nil)
     end,
 
+    on_trigger = function(self, event, target, player, data)
+        if player == nil then return false end
+        local room = player.room
+        if player.room:askForSkillInvoke(player, self.name) then
+            -- do something
+        end
+        return false
+    end,
+
 }
diff --git a/qml/Pages/Room.qml b/qml/Pages/Room.qml
index 3bc290eb..38836f5a 100644
--- a/qml/Pages/Room.qml
+++ b/qml/Pages/Room.qml
@@ -14,11 +14,13 @@ Item {
     property bool isStarted: false
 
     property alias popupBox: popupBox
+    property alias promptText: prompt.text
 
     // tmp
     Button {
         text: "quit"
-        anchors.bottom: parent.bottom
+        anchors.top: parent.top
+        anchors.right: parent.right
         onClicked: {
             ClientInstance.clearPlayers();
             ClientInstance.notifyServer("QuitRoom", "[]");
@@ -30,22 +32,60 @@ Item {
         anchors.centerIn: parent
     }
 
-    // For debugging
-    RowLayout {
-        visible: Debugging ? true : false
-        width: parent.width
-        TextField {
-            id: lua
-            Layout.fillWidth: true
-            text: "print \"Hello world.\""
-        }
-        Button {
-            text: "DoLuaScript"
-            onClicked: {
-                ClientInstance.notifyServer("DoLuaScript", JSON.stringify([lua.text]));
+    states: [
+        State { name: "notactive" }, // Normal status
+        State { name: "playing" }, // Playing cards in playing phase
+        State { name: "responding" }, // all requests need to operate dashboard
+        State { name: "replying" } // requests only operate a popup window
+    ]
+    state: "notactive"
+    transitions: [
+        Transition {
+            from: "*"; to: "notactive"
+            ScriptAction {
+                script: {
+                    promptText = "";
+                    progress.visible = false;
+                    okCancel.visible = false;
+                    endPhaseButton.visible = false;
+
+                    if (popupBox.item != null) {
+                        popupBox.item.finished();
+                    } 
+                }
+            }
+        },
+
+        Transition {
+            from: "*"; to: "playing"
+            ScriptAction {
+                script: {
+                    progress.visible = true;
+                    okCancel.visible = true;
+                    endPhaseButton.visible = true;
+                }
+            }
+        },
+
+        Transition {
+            from: "*"; to: "responding"
+            ScriptAction {
+                script: {
+                    progress.visible = true;
+                    okCancel.visible = true;
+                }
+            }
+        },
+
+        Transition {
+            from: "*"; to: "replying"
+            ScriptAction {
+                script: {
+                    progress.visible = true;
+                }
             }
         }
-    }
+    ]
 
     /* Layout:
      * +---------------------+
@@ -127,6 +167,74 @@ Item {
         self.isOwner: dashboardModel.isOwner
     }
 
+    Item {
+        id: controls
+        anchors.bottom: dashboard.top
+        anchors.bottomMargin: -40
+        width: roomScene.width
+
+        Text {
+            id: prompt
+            visible: progress.visible
+            anchors.bottom: progress.top
+            anchors.bottomMargin: 8
+            anchors.horizontalCenter: progress.horizontalCenter
+        }
+
+        ProgressBar {
+            id: progress
+            width: parent.width * 0.6
+            anchors.horizontalCenter: parent.horizontalCenter
+            anchors.bottom: okCancel.top
+            anchors.bottomMargin: 8
+            from: 0.0
+            to: 100.0
+
+            visible: false
+            NumberAnimation on value {
+                running: progress.visible
+                from: 100.0
+                to: 0.0
+                duration: config.roomTimeout * 1000
+
+                onFinished: {
+                    roomScene.state = "notactive"
+                }
+            }
+        }
+
+        Row {
+            id: okCancel
+            anchors.bottom: parent.bottom
+            anchors.horizontalCenter: progress.horizontalCenter
+            spacing: 20
+            visible: false
+
+            Button {
+                id: okButton
+                text: "OK"
+                onClicked: Logic.doOkButton();
+            }
+
+            Button {
+                id: cancelButton
+                text: "Cancel"
+                onClicked: Logic.doCancelButton();
+            }
+        }
+
+        Button {
+            id: endPhaseButton
+            text: "End"
+            anchors.bottom: parent.bottom
+            anchors.bottomMargin: 40
+            anchors.right: parent.right
+            anchors.rightMargin: 30
+            visible: false;
+            onClicked: Logic.doCancelButton();
+        }
+    }
+
     Loader {
         id: popupBox
         onSourceChanged: {
diff --git a/qml/Pages/RoomElement/ChoiceBox.qml b/qml/Pages/RoomElement/ChoiceBox.qml
new file mode 100644
index 00000000..ead7e80d
--- /dev/null
+++ b/qml/Pages/RoomElement/ChoiceBox.qml
@@ -0,0 +1,34 @@
+import QtQuick 2.15
+import ".."
+
+GraphicsBox {
+    property var options: []
+    property string skill_name: ""
+    property int result
+
+    id: root
+    title.text: skill_name + ": Please choose"
+    width: Math.max(140, body.width + 20)
+    height: body.height + title.height + 20
+
+    Column {
+        id: body
+        x: 10
+        y: title.height + 5
+        spacing: 10
+
+        Repeater {
+            model: options
+
+            MetroButton {
+                text: modelData
+                anchors.horizontalCenter: parent.horizontalCenter
+
+                onClicked: {
+                    result = index;
+                    root.close();
+                }
+            }
+        }
+    }
+}
diff --git a/qml/Pages/RoomLogic.js b/qml/Pages/RoomLogic.js
index 587f08cd..680e7d9e 100644
--- a/qml/Pages/RoomLogic.js
+++ b/qml/Pages/RoomLogic.js
@@ -48,6 +48,19 @@ function arrangePhotos() {
     }
 }
 
+function doOkButton() {
+    replyToServer("1");
+}
+
+function doCancelButton() {
+    replyToServer("");
+}
+
+function replyToServer(jsonData) {
+    roomScene.state = "notactive";
+    ClientInstance.replyToServer("", jsonData);
+}
+
 callbacks["AddPlayer"] = function(jsonData) {
     // jsonData: int id, string screenName, string avatar
     for (let i = 0; i < photoModel.count; i++) {
@@ -178,13 +191,38 @@ callbacks["AskForGeneral"] = function(jsonData) {
     // jsonData: string[] Generals
     // TODO: choose multiple generals
     let data = JSON.parse(jsonData);
+    roomScene.promptText = "Please choose 1 general";
+    roomScene.state = "replying";
     roomScene.popupBox.source = "RoomElement/ChooseGeneralBox.qml";
     let box = roomScene.popupBox.item;
     box.choiceNum = 1;
     box.accepted.connect(() => {
-        ClientInstance.replyToServer("AskForGeneral", JSON.stringify([box.choices[0]]));
+        replyToServer(JSON.stringify([box.choices[0]]));
     });
     for (let i = 0; i < data.length; i++)
         box.generalList.append({ "name": data[i] });
     box.updatePosition();
 }
+
+callbacks["AskForSkillInvoke"] = function(jsonData) {
+    // jsonData: string name
+    roomScene.promptText = "Do you want to invoke '" + jsonData + "' ?";
+    roomScene.state = "responding";
+}
+
+callbacks["AskForChoice"] = function(jsonData) {
+    // jsonData: [ string[] choices, string skill ]
+    // TODO: multiple choices, e.g. benxi_ol
+    let data = JSON.parse(jsonData);
+    let choices = data[0];
+    let skill_name = data[1];
+    roomScene.promptText = skill_name + ": Please make choice";
+    roomScene.state = "replying";
+    roomScene.popupBox.source = "RoomElement/ChoiceBox.qml";
+    let box = roomScene.popupBox.item;
+    box.options = choices;
+    box.skill_name = skill_name;
+    box.accepted.connect(() => {
+        replyToServer(choices[box.result]);
+    });
+}