diff --git a/docs/坦克大战笔记.docx b/docs/坦克大战笔记.docx
index 5535b28..33f32cc 100644
Binary files a/docs/坦克大战笔记.docx and b/docs/坦克大战笔记.docx differ
diff --git a/src/com/demo/tank/course9/Explode.java b/src/com/demo/tank/course9_10/Explode.java
similarity index 96%
rename from src/com/demo/tank/course9/Explode.java
rename to src/com/demo/tank/course9_10/Explode.java
index 5cbe9c8..1558f37 100644
--- a/src/com/demo/tank/course9/Explode.java
+++ b/src/com/demo/tank/course9_10/Explode.java
@@ -1,4 +1,4 @@
-package com.demo.tank.course9;
+package com.demo.tank.course9_10;
 
 import com.demo.tank.util.Audio;
 import com.demo.tank.util.ResourceManager;