diff --git a/辅助工具链.txt b/辅助工具链.txt
index 26e9502..6da4bf6 100644
--- a/辅助工具链.txt
+++ b/辅助工具链.txt
@@ -1,3 +1,5 @@
+https://www.zhihu.com/question/311903282/answer/1150522263
+
 pdf转markdown
 
 https://pdf2md.morethan.io/