diff --git a/Armv8.2-SM3和SM4.md b/Armv8.2-SM3和SM4.md
index 32597bf..e487fc4 100644
--- a/Armv8.2-SM3和SM4.md
+++ b/Armv8.2-SM3和SM4.md
@@ -26,6 +26,8 @@ AESE指令相当于：
 1. ShiftRows(State)
 1. SubBytes(State)
 
+**使用全0 RoundKey有没有什么副作用？**
+
 ```
     go test -v -short -bench . -run=^$ ./...
     goos: linux