diff --git a/SUMMARY.md b/SUMMARY.md
index e60f018e..3ae54443 100644
--- a/SUMMARY.md
+++ b/SUMMARY.md
@@ -30,7 +30,7 @@
   * [一致性](/notes/一致性.md)
   * [分布式问题分析](/notes/分布式问题分析.md)
 
-
+This file is used to generate gitbook catalogue.