diff --git a/docs/README-cn.md b/docs/README-cn.md
index 7ec707e..12172d6 100644
--- a/docs/README-cn.md
+++ b/docs/README-cn.md
@@ -31,7 +31,7 @@ For an English version of readme, please move [here](https://github.com/shenjack
     - `Pyglet 1.5.16`
     - `Json5 0.9.5`
     - `pillow 8.1.0`
-    - `AMD R5 5600X`(AMD YES!)
+    - `AMD R5 5600X(AMD YES!）`
 -
     - `开发平台2 macOS Big Sur`
     - `Python 3.8.7`
diff --git a/docs/background.png b/docs/background.png
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diff --git a/docs/plan_features/multi-control.md b/docs/plan_features/multi-control.md
index c2f2922..9098873 100644
--- a/docs/plan_features/multi-control.md
+++ b/docs/plan_features/multi-control.md
@@ -4,4 +4,29 @@
 
 ## shenjackyuanjie(writer)
 
+## planing
+
 ## 描述
+
+### 示例1
+
+可以让多个指令舱同时进行动作
+
+比如一个空间站由很多部分组成
+
+每一个部分都由不同的指令舱控制
+
+多指令舱控制就可以实现空间站所有部分统一加速、减速
+
+其实也是某种程度上的统一控制
+
+### 示例2
+
+在同时发射多枚火箭/卫星时
+
+可以让火箭在操作其他火箭的时候继续燃烧
+
+（就是说操纵A火箭的时候，B火箭还能继续燃烧）
+
+### 底层机制
+
diff --git a/docs/rua!.md b/docs/rua!.md
index d00cff2..d5d067f 100644
--- a/docs/rua!.md
+++ b/docs/rua!.md
@@ -12,4 +12,9 @@ pyglet 坐标轴原点是左上角
 
 # 渲染
 
-屏幕坐标系需要*100（有待测试）
\ No newline at end of file
+屏幕坐标系需要*100（有待测试）
+
+# 素材提供
+
+[背景候选1号](background.png)
+来自 @底层萌新 QQ：1744251171
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