diff --git a/readme2.md b/readme2.md
index 81db4f2..630ab07 100644
--- a/readme2.md
+++ b/readme2.md
@@ -332,7 +332,7 @@ Step 2.13:if c == 11 then PrintScore
 Step 2.14:if c == 12 then WritetoFile
 Step 2.15:if c == 13 then ReadfromFile
 Step 2.16:if c == 0 then exit
-！[详细设计](257e234fdfd1fa6b1b8baa163ceaaa4./)
+！[详细设计](lyx.drawio.svg)
 系统模块图
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 1·输入n个学生的m门课成绩