diff --git a/docs/note/optimization/README.md b/docs/note/optimization/README.md
index 7ae2760..977fd65 100644
--- a/docs/note/optimization/README.md
+++ b/docs/note/optimization/README.md
@@ -24,6 +24,7 @@
 ## DOMContentLoaded
 
 当初始的 **HTML** 文档被完全加载和解析完成之后，**`DOMContentLoaded`** 事件被触发，而无需等待样式表、图像和子框架的完全加载。
+qqq