diff --git a/package.json b/package.json
index 17e7f4d..5eece45 100644
--- a/package.json
+++ b/package.json
@@ -3,6 +3,7 @@
   "version": "0.1.0",
   "private": true,
   "dependencies": {
+    "@material-ui/icons": "^4.9.1",
     "@material-ui/core": "^4.9.0",
     "element-react": "^1.4.34",
     "element-theme-default": "^1.4.13",
diff --git a/server/package.json b/server/package.json
index cba61ac..1fd906f 100644
--- a/server/package.json
+++ b/server/package.json
@@ -11,6 +11,7 @@
   "author": "",
   "license": "ISC",
   "dependencies": {
+    "@material-ui/icons": "^4.9.1",
     "cors": "^2.8.5",
     "express": "^4.17.1",
     "nodemon": "^2.0.2",
diff --git a/server/sample_data/sample_doudizhu.json b/server/sample_data/sample_doudizhu.json
index 71585c6..cfa93f1 100644
--- a/server/sample_data/sample_doudizhu.json
+++ b/server/sample_data/sample_doudizhu.json
@@ -8,143 +8,469 @@
     {
       "id": 0,
       "index": 0,
-      "role": "peasant"
+      "role": "peasant",
+      "agentInfo": {
+        "name": "random",
+        "winRate": 0.333
+      }
     },
     {
       "id": 1,
       "index": 1,
-      "role": "peasant"
+      "role": "peasant",
+      "agentInfo": {
+        "name": "DQN",
+        "winRate": 0.555
+      }
     },
     {
       "id": 2,
       "index": 2,
-      "role": "landlord"
+      "role": "landlord",
+      "agentInfo": {
+        "name": "CFR",
+        "winRate": 0.666
+      }
     }
   ],
   "moveHistory": [
     {
       "playerIdx": 2,
-      "move": "H3 S3 D3 D5"
+      "move": "H3 S3 D3 D5",
+      "probabilities": [
+        {
+          "move": "H3 S3 D3 D5",
+          "probability": 0.9
+        },
+        {
+          "move": "H3",
+          "probability": 0.05
+        },
+        {
+          "move": "D5",
+          "probability": 0.02
+        }
+      ]
     },
     {
       "playerIdx": 0,
-      "move": "S9 H9 D9 S3"
+      "move": "S9 H9 D9 S3",
+      "probabilities": [
+        {
+          "move": "S9 H9 D9 S3",
+          "probability": 0.9
+        },
+        {
+          "move": "HQ CQ DQ S3",
+          "probability": 0.05
+        },
+        {
+          "move": "HQ CQ DQ C3",
+          "probability": 0.02
+        }
+      ]
     },
     {
       "playerIdx": 1,
-      "move": "P"
+      "move": "P",
+      "probabilities": [
+        {
+          "move": "P",
+          "probability": 1
+        }
+      ]
     },
     {
       "playerIdx": 2,
-      "move": "SJ HJ DJ D7"
+      "move": "SJ HJ DJ D7",
+      "probabilities": [
+        {
+          "move": "SJ HJ DJ D7",
+          "probability": 0.9
+        },
+        {
+          "move": "SJ HJ DJ C9",
+          "probability": 0.05
+        },
+        {
+          "move": "BJ RJ",
+          "probability": 0.02
+        }
+      ]
     },
     {
       "playerIdx": 0,
-      "move": "HQ CQ DQ C7"
+      "move": "HQ CQ DQ C7",
+      "probabilities": [
+        {
+          "move": "HQ CQ DQ C7",
+          "probability": 0.9
+        },
+        {
+          "move": "HQ CQ DQ CJ",
+          "probability": 0.05
+        },
+        {
+          "move": "P",
+          "probability": 0.02
+        }
+      ]
     },
     {
       "playerIdx": 1,
-      "move": "P"
+      "move": "P",
+      "probabilities": [
+        {
+          "move": "P",
+          "probability": 1
+        }
+      ]
     },
     {
       "playerIdx": 2,
-      "move": "P"
+      "move": "P",
+      "probabilities": [
+        {
+          "move": "P",
+          "probability": 1
+        }
+      ]
     },
     {
       "playerIdx": 0,
-      "move": "C4 D4"
+      "move": "C4 D4",
+      "probabilities": [
+        {
+          "move": "HK DK",
+          "probability": 0.5
+        },
+        {
+          "move": "C4 D4",
+          "probability": 0.2
+        },
+        {
+          "move": "S2 H2",
+          "probability": 0.1
+        }
+      ]
     },
     {
       "playerIdx": 1,
-      "move": "ST HT"
+      "move": "ST HT",
+      "probabilities": [
+        {
+          "move": "S6 D6",
+          "probability": 0.5
+        },
+        {
+          "move": "ST HT",
+          "probability": 0.2
+        },
+        {
+          "move": "HA CA",
+          "probability": 0.1
+        }
+      ]
     },
     {
       "playerIdx": 2,
-      "move": "SK CK"
+      "move": "SK CK",
+      "probabilities": [
+        {
+          "move": "P",
+          "probability": 0.5
+        },
+        {
+          "move": "RJ BJ",
+          "probability": 0.3
+        },
+        {
+          "move": "SK CK",
+          "probability": 0.2
+        }
+      ]
     },
     {
       "playerIdx": 0,
-      "move": "S2 H2"
+      "move": "S2 H2",
+      "probabilities": [
+        {
+          "move": "P",
+          "probability": 0.5
+        },
+        {
+          "move": "HK DK",
+          "probability": 0.5
+        }
+      ]
     },
     {
       "playerIdx": 1,
-      "move": "P"
+      "move": "P",
+      "probabilities": [
+        {
+          "move": "P",
+          "probability": 1
+        }
+      ]
     },
     {
       "playerIdx": 2,
-      "move": "P"
+      "move": "P",
+      "probabilities": [
+        {
+          "move": "P",
+          "probability": 1
+        }
+      ]
     },
     {
       "playerIdx": 0,
-      "move": "S6 H6"
+      "move": "S6 H6",
+      "probabilities": [
+        {
+          "move": "S6 H6",
+          "probability": 0.6
+        },
+        {
+          "move": "HK DK",
+          "probability": 0.2
+        },
+        {
+          "move": "CJ",
+          "probability": 0.1
+        }
+      ]
     },
     {
       "playerIdx": 1,
-      "move": "P"
+      "move": "P",
+      "probabilities": [
+        {
+          "move": "P",
+          "probability": 0.8
+        },
+        {
+          "move": "S7 H7",
+          "probability": 0.1
+        },
+        {
+          "move": "HA CA",
+          "probability": 0.05
+        }
+      ]
     },
     {
       "playerIdx": 2,
-      "move": "CT DT"
+      "move": "CT DT",
+      "probabilities": [
+        {
+          "move": "P",
+          "probability": 0.5
+        },
+        {
+          "move": "S7 H7",
+          "probability": 0.1
+        },
+        {
+          "move": "HA CA",
+          "probability": 0.05
+        }
+      ]
     },
     {
       "playerIdx": 0,
-      "move": "HK DK"
+      "move": "HK DK",
+      "probabilities": [
+        {
+          "move": "HK DK",
+          "probability": 0.9
+        },
+        {
+          "move": "P",
+          "probability": 0.1
+        }
+      ]
     },
     {
       "playerIdx": 1,
-      "move": "P"
+      "move": "P",
+      "probabilities": [
+        {
+          "move": "P",
+          "probability": 0.9
+        },
+        {
+          "move": "HA CA",
+          "probability": 0.1
+        }
+      ]
     },
     {
       "playerIdx": 2,
-      "move": "RJ BJ"
+      "move": "RJ BJ",
+      "probabilities": [
+        {
+          "move": "RJ BJ",
+          "probability": 0.9
+        },
+        {
+          "move": "P",
+          "probability": 0.1
+        }
+      ]
     },
     {
       "playerIdx": 0,
-      "move": "P"
+      "move": "P",
+      "probabilities": [
+        {
+          "move": "P",
+          "probability": 1
+        }
+      ]
     },
     {
       "playerIdx": 1,
-      "move": "P"
+      "move": "P",
+      "probabilities": [
+        {
+          "move": "P",
+          "probability": 1
+        }
+      ]
     },
     {
       "playerIdx": 2,
-      "move": "S8 H8 C8 C9"
+      "move": "S8 H8 C8 C9",
+      "probabilities": [
+        {
+          "move": "S8 H8 C8 C9",
+          "probability": 0.7
+        },
+        {
+          "move": "SA",
+          "probability": 0.1
+        },
+        {
+          "move": "D2",
+          "probability": 0.1
+        }
+      ]
     },
     {
       "playerIdx": 0,
-      "move": "P"
+      "move": "P",
+      "probabilities": [
+        {
+          "move": "P",
+          "probability": 1
+        }
+      ]
     },
     {
       "playerIdx": 1,
-      "move": "HA CA DA H5"
+      "move": "HA CA DA H5",
+      "probabilities": [
+        {
+          "move": "HA CA DA H5",
+          "probability": 0.5
+        },
+        {
+          "move": "P",
+          "probability": 0.1
+        },
+        {
+          "move": "HA CA DA D6",
+          "probability": 0.1
+        }
+      ]
     },
     {
       "playerIdx": 2,
-      "move": "P"
+      "move": "P",
+      "probabilities": [
+        {
+          "move": "P",
+          "probability": 1
+        }
+      ]
     },
     {
       "playerIdx": 0,
-      "move": "P"
+      "move": "P",
+      "probabilities": [
+        {
+          "move": "P",
+          "probability": 1
+        }
+      ]
     },
     {
       "playerIdx": 1,
-      "move": "SQ"
+      "move": "SQ",
+      "probabilities": [
+        {
+          "move": "SQ",
+          "probability": 0.5
+        },
+        {
+          "move": "S4 H4",
+          "probability": 0.2
+        },
+        {
+          "move": "D6",
+          "probability": 0.1
+        }
+      ]
     },
     {
       "playerIdx": 2,
-      "move": "D2"
+      "move": "D2",
+      "probabilities": [
+        {
+          "move": "D2",
+          "probability": 0.5
+        },
+        {
+          "move": "SA",
+          "probability": 0.3
+        },
+        {
+          "move": "P",
+          "probability": 0.2
+        }
+      ]
     },
     {
       "playerIdx": 0,
-      "move": "P"
+      "move": "P",
+      "probabilities": [
+        {
+          "move": "P",
+          "probability": 1
+        }
+      ]
     },
     {
       "playerIdx": 1,
-      "move": "P"
+      "move": "P",
+      "probabilities": [
+        {
+          "move": "P",
+          "probability": 1
+        }
+      ]
     },
     {
       "playerIdx": 2,
-      "move": "SA"
+      "move": "SA",
+      "probabilities": [
+        {
+          "move": "SA",
+          "probability": 1
+        }
+      ]
     }
   ]
 }
\ No newline at end of file
diff --git a/src/utils/index.js b/src/utils/index.js
index e8a126c..fc6212a 100644
--- a/src/utils/index.js
+++ b/src/utils/index.js
@@ -74,4 +74,17 @@ export function millisecond2Second(t){
     return Math.ceil(t/1000);
 }
 
-export { suitMap, suitMapSymbol };
\ No newline at end of file
+export function debounce(func, wait, immediate) {
+    let timeout;
+    return function() {
+        const context = this, args = arguments;
+        const later = function () {
+            timeout = null;
+            if (!immediate) func.apply(context, args);
+        };
+        const callNow = immediate && !timeout;
+        clearTimeout(timeout);
+        timeout = setTimeout(later, wait);
+        if (callNow) func.apply(context, args);
+    };
+}
\ No newline at end of file
diff --git a/src/view/DoudizhuGameView.js b/src/view/DoudizhuGameView.js
index 4287a73..1d5be15 100644
--- a/src/view/DoudizhuGameView.js
+++ b/src/view/DoudizhuGameView.js
@@ -2,21 +2,26 @@ import React from 'react';
 import '../assets/gameview.scss';
 import { DoudizhuGameBoard } from '../components/GameBoard';
 import webSocket from "socket.io-client";
-import { removeCards, doubleRaf, deepCopy } from "../utils";
+import { removeCards, doubleRaf, deepCopy, debounce } from "../utils";
 
-import { Button, Layout } from 'element-react';
+import { Layout } from 'element-react';
 import Slider from '@material-ui/core/Slider';
+import Button from '@material-ui/core/Button';
+import PlayArrowRoundedIcon from '@material-ui/icons/PlayArrowRounded';
+import PauseCircleOutlineRoundedIcon from '@material-ui/icons/PauseCircleOutlineRounded';
+import ReplayRoundedIcon from '@material-ui/icons/ReplayRounded';
 
 class DoudizhuGameView extends React.Component {
     constructor(props) {
         super(props);
 
         const mainViewerId = 0;     // Id of the player at the bottom of screen
-        this.initConsiderationTime = 1000;
+        this.initConsiderationTime = 2000;
         this.considerationTimeDeduction = 100;
         this.gameStateTimeout = null;
 
         this.initGameState = {
+            gameStatus: "ready", // "ready", "playing", "paused", "over"
             playerInfo: [],
             hands: [],
             latestAction: [[], [], []],
@@ -30,15 +35,21 @@ class DoudizhuGameView extends React.Component {
             ws: null,
             gameInfo: this.initGameState,
             gameStateLoop: null,
-            considerationTimeSetting: this.initConsiderationTime
+            gameSpeed: 0
         };
     }
 
     gameStateTimer() {
         this.gameStateTimeout = setTimeout(()=>{
             let currentConsiderationTime = this.state.gameInfo.considerationTime;
+            // for test use
+            // console.log(currentConsiderationTime);
+            // if(currentConsiderationTime === 1000){
+            //     debugger;
+            // }
             if(currentConsiderationTime > 0) {
-                currentConsiderationTime -= this.considerationTimeDeduction;
+                currentConsiderationTime -= this.considerationTimeDeduction * Math.pow(2, this.state.gameSpeed);
+                currentConsiderationTime = currentConsiderationTime < 0 ? 0 : currentConsiderationTime;
                 let gameInfo = deepCopy(this.state.gameInfo);
                 gameInfo.considerationTime = currentConsiderationTime;
                 this.setState({gameInfo: gameInfo});
@@ -53,7 +64,7 @@ class DoudizhuGameView extends React.Component {
                 this.setState({gameInfo: gameInfo});
                 this.state.ws.emit("getMessage", gameStateReq);
             }
-        }, this.considerationTimeDeduction);
+        }, 100);
     }
 
     startReplay() {
@@ -61,7 +72,11 @@ class DoudizhuGameView extends React.Component {
             const replayReq = {type: 0};
             this.state.ws.emit("getMessage", replayReq);
             // init game state
-            this.setState({gameInfo: this.initGameState});
+            let initGameState = deepCopy(this.initGameState);
+            // set game status to playing
+            initGameState.gameStatus = "playing";
+            this.setState({gameInfo: initGameState});
+
             if(this.gameStateTimeout){
                 window.clearTimeout(this.gameStateTimeout);
                 this.gameStateTimeout = null;
@@ -104,7 +119,7 @@ class DoudizhuGameView extends React.Component {
                             }else{
                                 console.log("Cannot find cards in move from player's hand");
                             }
-                            gameInfo.considerationTime = this.state.considerationTimeSetting;
+                            gameInfo.considerationTime = this.initConsiderationTime;
                             this.setState({gameInfo: gameInfo});
                         }else{
                             console.log("Mismatched game turn or current player index", message);
@@ -127,6 +142,9 @@ class DoudizhuGameView extends React.Component {
                     return element.index === prevTurn.currentPlayer;
                 });
                 if(winner){
+                    let gameInfo = deepCopy(this.state.gameInfo);
+                    gameInfo.gameStatus = "over";
+                    this.setState({ gameInfo: gameInfo });
                     if(winner.role === "landlord")
                         alert("Landlord Wins");
                     else
@@ -139,8 +157,79 @@ class DoudizhuGameView extends React.Component {
             this.gameStateTimer();
     }
 
+    pauseReplay(){
+        if(this.gameStateTimeout){
+            window.clearTimeout(this.gameStateTimeout);
+            this.gameStateTimeout = null;
+        }
+        let gameInfo = deepCopy(this.state.gameInfo);
+        gameInfo.gameStatus = "paused";
+        this.setState({ gameInfo: gameInfo });
+    }
+
+    resumeReplay(){
+        this.gameStateTimer();
+        let gameInfo = deepCopy(this.state.gameInfo);
+        gameInfo.gameStatus = "playing";
+        this.setState({ gameInfo: gameInfo });
+    }
+
+    changeGameSpeed(newVal){
+        console.log('wdnmd');
+        this.setState({gameSpeed: newVal});
+    }
+
+    gameStatusButton(status){
+        switch (status) {
+            case "ready":
+                return <Button variant={"contained"} startIcon={<PlayArrowRoundedIcon />} color="primary" onClick={()=>{this.startReplay()}}>Start Replay</Button>;
+            case "playing":
+                return <Button variant={"contained"} startIcon={<PauseCircleOutlineRoundedIcon />} color="secondary" onClick={()=>{this.pauseReplay()}}>Pause</Button>;
+            case "paused":
+                return <Button variant={"contained"} startIcon={<PlayArrowRoundedIcon />} color="primary" onClick={()=>{this.resumeReplay()}}>Resume</Button>;
+            case "over":
+                return <Button variant={"contained"} startIcon={<ReplayRoundedIcon />} color="primary" onClick={()=>{this.startReplay()}}>Resume</Button>;
+            default:
+                alert(`undefined game status: ${status}`);
+        }
+        return ;
+    }
+
     render(){
-        // todo: reset game state timer when considerationTimeSetting changes
+        let sliderValueText = (value) => {
+            return `${value}°C`;
+        };
+        const gameSpeedMarks = [
+            {
+                value: -3,
+                label: 'x0.125',
+            },
+            {
+                value: -2,
+                label: 'x0.25',
+            },
+            {
+                value: -1,
+                label: 'x0.5',
+            },
+            {
+                value: 0,
+                label: 'x1',
+            },
+            {
+                value: 1,
+                label: 'x2',
+            },
+            {
+                value: 2,
+                label: 'x4',
+            },
+            {
+                value: 3,
+                label: 'x8',
+            }
+        ];
+
         return (
             <div>
                 <div style={{width: "960px", height: "540px"}}>
@@ -158,8 +247,8 @@ class DoudizhuGameView extends React.Component {
                 <div className="game-controller">
                     <Layout.Row>
                         <Layout.Col span="24">
-                            <Button type="primary" onClick={()=>{this.connectWebSocket()}}>Connect</Button>
-                            <Button type="primary" onClick={()=>{this.startReplay()}}>Start Replay</Button>
+                            <Button variant={"contained"} color="primary" onClick={()=>{this.connectWebSocket()}}>Connect</Button>
+                            { this.gameStatusButton(this.state.gameInfo.gameStatus) }
                         </Layout.Col>
                     </Layout.Row>
                     <Layout.Row style={{height: "31px"}}>
@@ -170,14 +259,16 @@ class DoudizhuGameView extends React.Component {
                         </Layout.Col>
                         <Layout.Col span="16">
                             <Slider
-                                value={this.state.considerationTimeSetting}
-                                onChange={(e, newVal)=>{console.log('slider val', newVal);this.setState({considerationTimeSetting: newVal})}}
-                                aria-labelledby="discrete-slider"
-                                valueLabelDisplay="auto"
-                                step={1000}
-                                marks
-                                min={0}
-                                max={10000}
+                                value={this.state.gameSpeed}
+                                getAriaValueText={sliderValueText}
+                                onChange={(e, newVal)=>{this.changeGameSpeed(newVal)}}
+                                aria-labelledby="discrete-slider-custom"
+                                step={1}
+                                min={-3}
+                                max={3}
+                                track={false}
+                                valueLabelDisplay="off"
+                                marks={gameSpeedMarks}
                             />
                         </Layout.Col>
                     </Layout.Row>