diff --git a/EssOS/项目分析.md b/EssOS/项目分析.md
index 9ce8f8f..d38287b 100644
--- a/EssOS/项目分析.md
+++ b/EssOS/项目分析.md
@@ -33,7 +33,8 @@ sequenceDiagram
 场景2
 
 ```flow
-str=>Start: 
+str=>start: Start
+end=>end: End
 ```