diff --git a/README.md b/README.md
index 616c3db59..bab0caa46 100644
--- a/README.md
+++ b/README.md
@@ -35,6 +35,7 @@ PikaScript is an ultra-lightweight Python engine with zero dependencies and zero
 <img src="https://user-images.githubusercontent.com/88232613/147799704-d79345da-a2b9-4593-b1eb-ff9de127429a.png" width="500"/>
 
 It's very easy to bind C function to python module with the help of Pika Pre-compiler.
+Only write the API of python in `.py` and the bindings are autoly generated by Pre-compiler.
 
 <img src="document/image/138021445-13643518-b0a3-4872-a290-5dec27697837.png" width="700"/>