diff --git a/QtScrcpy/QtScrcpyCore b/QtScrcpy/QtScrcpyCore
index 8e2cc1f3b..6beab5c96 160000
--- a/QtScrcpy/QtScrcpyCore
+++ b/QtScrcpy/QtScrcpyCore
@@ -1 +1 @@
-Subproject commit 8e2cc1f3b17ad888b567ce05c5fe125bcaca0dd5
+Subproject commit 6beab5c967f7f77ddcfabe79757dc01202653ab7
diff --git a/QtScrcpy/util/config.cpp b/QtScrcpy/util/config.cpp
index 5915cf29e..43bcee079 100644
--- a/QtScrcpy/util/config.cpp
+++ b/QtScrcpy/util/config.cpp
@@ -18,7 +18,7 @@
 #define COMMON_PUSHFILE_DEF "/sdcard/"
 
 #define COMMON_SERVER_VERSION_KEY "ServerVersion"
-#define COMMON_SERVER_VERSION_DEF "2.1.1"
+#define COMMON_SERVER_VERSION_DEF "3.1"
 
 #define COMMON_SERVER_PATH_KEY "ServerPath"
 #define COMMON_SERVER_PATH_DEF "/data/local/tmp/scrcpy-server.jar"
diff --git a/config/config.ini b/config/config.ini
index adb2bd3d7..a35cc0d45 100644
--- a/config/config.ini
+++ b/config/config.ini
@@ -10,7 +10,7 @@ RenderExpiredFrames=0
 # 视频解码方式：-1 自动，0 软解，1 dx硬解，2 opengl硬解
 UseDesktopOpenGL=-1
 # scrcpy-server的版本号（不要修改）
-ServerVersion=3.0.2
+ServerVersion=3.1
 # scrcpy-server推送到安卓设备的路径
 ServerPath=/data/local/tmp/scrcpy-server.jar
 # 自定义adb路径，例如D:/android/tools/adb.exe
diff --git a/docs/KeyMapDes.md b/docs/KeyMapDes.md
index bd896cda1..3d83df990 100644
--- a/docs/KeyMapDes.md
+++ b/docs/KeyMapDes.md
@@ -60,6 +60,8 @@ Description of the unique attributes of different key mapping types:
     -key The key code to be mapped
     -startPos Simulate the start position of touch drag
     -endPos Simulate the end position of touch drag
+    -dragSpeed Speed of the drag movement (range 0-1, default 1.0). Higher values result in faster movements
+    -startDelay Optional delay in milliseconds to wait after the initial touch before starting the drag movement
 
 -KMT_STEER_WHEEL
     -centerPos steering wheel center point
@@ -71,3 +73,18 @@ Description of the unique attributes of different key mapping types:
     -rightOffset After pressing the right direction key, drag it to the right offset of the center to the right of the centerPos position
     -upOffset After pressing the up arrow key, drag it to the upper offset position horizontally relative to the centerPos position
     -downOffset Press the down arrow key and drag it to the downOffset position horizontally relative to the centerPos position
+
+## Visual Key Mapping Tool
+
+A web-based GUI tool is available to help you create and manage key mappings visually: [ScrcpyKeyMapper](https://github.com/w4po/ScrcpyKeyMapper)
+
+![ScrcpyKeyMapper Screenshot](https://raw.githubusercontent.com/w4po/ScrcpyKeyMapper/main/assets/screenshot.png)
+
+You can use this tool to:
+- Create key mappings visually
+- Test your mappings in real-time
+- Export mappings as JSON files
+- Import existing mappings for editing
+
+Try it online: [ScrcpyKeyMapper Web App](https://w4po.github.io/ScrcpyKeyMapper)
+
diff --git a/docs/KeyMapDes_zh.md b/docs/KeyMapDes_zh.md
index 07669a0f1..3cace6feb 100644
--- a/docs/KeyMapDes_zh.md
+++ b/docs/KeyMapDes_zh.md
@@ -60,6 +60,8 @@
     - key 要映射的按键码
     - startPos 模拟触摸拖动的开始位置
     - endPos 模拟触摸拖动的结束位置
+    - dragSpeed 拖动移动的速度（范围0-1，默认1.0）。数值越大，移动越快
+    - startDelay 可选的延迟时间（毫秒），在开始拖动移动之前等待指定的时间
 
 - KMT_STEER_WHEEL
     - centerPos 方向盘中心点
@@ -72,5 +74,16 @@
     - upOffset 按下上方向键后模拟拖动到相对centerPos位置水平偏上upOffset处
     - downOffset 按下下方向键后模拟拖动到相对centerPos位置水平偏下downOffset处
     
+## 可视化按键映射工具
 
-    
+现在有一个基于Web的GUI工具可以帮助你直观地创建和管理按键映射：[ScrcpyKeyMapper](https://github.com/w4po/ScrcpyKeyMapper)
+
+![ScrcpyKeyMapper截图](https://raw.githubusercontent.com/w4po/ScrcpyKeyMapper/main/assets/screenshot.png)
+
+你可以使用这个工具来：
+- 直观地创建按键映射
+- 实时测试你的映射
+- 导出映射为JSON文件
+- 导入现有映射进行编辑
+
+在线试用：[ScrcpyKeyMapper网页应用](https://w4po.github.io/ScrcpyKeyMapper)