diff --git a/SUMMARY.md b/SUMMARY.md
index 625f8f5..9abab1d 100644
--- a/SUMMARY.md
+++ b/SUMMARY.md
@@ -1,4 +1,4 @@
-# Summary
+bui# Summary
 
 * [简介](README.md)
 * [序言](preface.md)