diff --git a/lang/zh_cn/help/lesson/bgcolor.html b/lang/zh_cn/help/lesson/bgcolor.html
deleted file mode 100644
index 31430a04d38..00000000000
--- a/lang/zh_cn/help/lesson/bgcolor.html
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@@ -1,3 +0,0 @@
-<p align="center"><b>幻灯片背景颜色</b></p>
-
-<p>输入6位十六进制数字表示的幻灯片颜色。</p>
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