diff --git a/Azleal.md b/Azleal.md
index 6b605f2f..d11a8f87 100644
--- a/Azleal.md
+++ b/Azleal.md
@@ -378,4 +378,6 @@ receive()   fallback()
 
 3.  EIP712 类型化数据签名
 
+4.  
+
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