diff --git a/samples/demo01.md b/samples/demo01.md
index 7b9f373..7d479e1 100644
--- a/samples/demo01.md
+++ b/samples/demo01.md
@@ -13,7 +13,6 @@ export_on_save:
 
 ```plantuml
 @startuml
-
 !include https://deep-tek.com/puml/core.puml
 
 用户 -> 认证中心: 登录操作
@@ -70,6 +69,7 @@ public void fun() {
 ```
 # C4图
 ```plantuml
+
 @startuml container-diagram
 
 !include https://deep-tek.com/puml/C4_Component.puml