diff --git a/EssOS/项目分析.md b/EssOS/项目分析.md
index f2f9a52..9e26324 100644
--- a/EssOS/项目分析.md
+++ b/EssOS/项目分析.md
@@ -17,3 +17,6 @@ c-->d
 d-->e
 ````
 
+````sequenceDiagram
+````
+