diff --git a/README.md b/README.md
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+++ b/README.md
@@ -221,7 +221,7 @@ a: No such file or directory
 
 
 ##### delete_data
-
+![](delete_data.drawio.svg)
 
 ##### add_data
 Step 1: if 数据库满 then 提示数据库满并结束