diff --git a/SM3中的FF2和GG2函数.md b/SM3中的FF2和GG2函数.md
index b8c7fa3..18d3734 100644
--- a/SM3中的FF2和GG2函数.md
+++ b/SM3中的FF2和GG2函数.md
@@ -47,4 +47,10 @@ $GG2(X,Y,Z)$
 = $(\lnot X \land Z) \lor (\lnot X \land \lnot Y \land Z) \lor (X \land Y) \lor (X \land Y \land \lnot Z) $  
 = $((\lnot X \land Z) \lor (\lnot X \land Z \land \lnot Y)) \lor ((X \land Y) \lor (X \land Y \land \lnot Z))$  
 = $((X \land Y) \land (1 \lor \lnot Z)) \lor ((\lnot X \land Z) \land (1 \lor \lnot Y))$  
-= $(X \land Y) \lor (\lnot X \land Z)$  
\ No newline at end of file
+= $(X \land Y) \lor (\lnot X \land Z)$  
+
+$FF2(X, Y, Z) = (X \land Y) \bigoplus (X \land Z) \bigoplus (Y \land Z)$  
+$(X \land Y) \bigoplus (X \land Z) $  
+= $X \land (Y \bigoplus Z)$  
+= $X \land ((Y \land \lnot Z) \lor (\lnot Y \land Z))$  
+= $(X \land Y \land \lnot Z) \lor (X \land Z \land \lnot Y)$  
\ No newline at end of file