diff --git a/SM4-with-GFNI.md b/SM4-with-GFNI.md
index 3560079..a881bad 100644
--- a/SM4-with-GFNI.md
+++ b/SM4-with-GFNI.md
@@ -17,6 +17,7 @@
 ## GFNI
 1. Affine Transformation (单指令)
 2. Affine Transformation Inverse (单指令)
+[示例代码](https://github.com/emmansun/simd/blob/main/amd64/sse/sse_gfni_test.go)
 
 # 生成映射
 [AES SM4 GFNI](https://gist.github.com/emmansun/cb9f14beafa9f75954f3e1883b62a2d3)