diff --git a/content/post/teach-courses/index.md b/content/post/teach-courses/index.md
index 19990a3..67eb5d8 100644
--- a/content/post/teach-courses/index.md
+++ b/content/post/teach-courses/index.md
@@ -43,7 +43,6 @@ Teach your course by sharing videos with your students. Choose from one of the f
 
     {{</* bilibili BV1WV4y1r7DF */>}}
 
-{{< bilibili BV1WV4y1r7DF >}}
 
 **Video file**