diff --git a/lang/zh_cn/help/lesson/width.html b/lang/zh_cn/help/lesson/width.html
deleted file mode 100644
index 0ae1e01f41b..00000000000
--- a/lang/zh_cn/help/lesson/width.html
+++ /dev/null
@@ -1,3 +0,0 @@
-<p align="center"><b>幻灯片宽度</b></p>
-
-<p>输入幻灯片的宽度应当是多少像素。</p>
\ No newline at end of file