diff --git a/README.md b/README.md
index 2066efd..bf2e364 100644
--- a/README.md
+++ b/README.md
@@ -2,3 +2,5 @@
 A simple tool to download lyrics in Netease Music
 
 English|[简体中文](./README_cn.md)
+# How does it work?
+>It uses the third-party module 'requests' to fetch the lyric on music.163.com