diff --git a/EssOS/项目分析.md b/EssOS/项目分析.md
index d189bd6..378be2c 100644
--- a/EssOS/项目分析.md
+++ b/EssOS/项目分析.md
@@ -33,6 +33,8 @@ sequenceDiagram
 场景2
 
 ```flow
+graph TD;
+
 str=>start: Start
 op=>operation: 领导
 cond=>condition: 是否提交