diff --git a/README.md b/README.md
index 72f176b..5c75760 100644
--- a/README.md
+++ b/README.md
@@ -6,10 +6,13 @@
 mkdir build
 cd build
 cmake ..
+# cmake -G"MinGW Makefiles" ..
 make
 make install
 ```
 
+In Windows, you need to convert `.cpp` and `.txt` from UTF-8 to GBK.
+
 ## How to use it?
 
 [English](https://github.com/Konano/Ingress-Field-Design/wiki/Instructions-for-use)