diff --git a/include/gmssl/sm9_z256.h b/include/gmssl/sm9_z256.h
index 3ea20564..5a1bf7ea 100644
--- a/include/gmssl/sm9_z256.h
+++ b/include/gmssl/sm9_z256.h
@@ -190,7 +190,6 @@ typedef struct {
 void sm9_z256_point_from_hex(SM9_Z256_POINT *R, const char hex[65 * 2]);
 int  sm9_z256_point_is_at_infinity(const SM9_Z256_POINT *P);
 void sm9_z256_point_set_infinity(SM9_Z256_POINT *R);
-void sm9_z256_point_copy(SM9_Z256_POINT *R, const SM9_Z256_POINT *P);
 void sm9_z256_point_get_xy(const SM9_Z256_POINT *P, sm9_z256_t x, sm9_z256_t y);
 int  sm9_z256_point_equ(const SM9_Z256_POINT *P, const SM9_Z256_POINT *Q);
 int  sm9_z256_point_is_on_curve(const SM9_Z256_POINT *P);
@@ -211,8 +210,6 @@ typedef struct {
 	sm9_z256_fp2 Z;
 } SM9_Z256_TWIST_POINT;
 
-//#define sm9_z256_twist_point_copy(R, P)	memcpy((R), (P), sizeof(SM9_Z256_TWIST_POINT))
-
 int sm9_z256_twist_point_to_uncompressed_octets(const SM9_Z256_TWIST_POINT *P, uint8_t octets[129]);
 int sm9_z256_twist_point_from_uncompressed_octets(SM9_Z256_TWIST_POINT *P, const uint8_t octets[129]);
 
diff --git a/src/sm9_z256_alg.c b/src/sm9_z256_alg.c
index abff4f20..30725632 100644
--- a/src/sm9_z256_alg.c
+++ b/src/sm9_z256_alg.c
@@ -1738,11 +1738,6 @@ void sm9_z256_point_set_infinity(SM9_Z256_POINT *R)
 	sm9_z256_set_zero(R->Z);
 }
 
-void sm9_z256_point_copy(SM9_Z256_POINT *R, const SM9_Z256_POINT *P)
-{
-	*R = *P;
-}
-
 // xy from this function are still mont
 void sm9_z256_point_get_xy(const SM9_Z256_POINT *P, sm9_z256_t x, sm9_z256_t y)
 {
@@ -1815,7 +1810,7 @@ void sm9_z256_point_dbl(SM9_Z256_POINT *R, const SM9_Z256_POINT *P)
 	sm9_z256_t X3, Y3, Z3, T1, T2, T3;
 
 	if (sm9_z256_point_is_at_infinity(P)) {
-		sm9_z256_point_copy(R, P);
+		*R = *P;
 		return;
 	}
 
@@ -1853,11 +1848,11 @@ void sm9_z256_point_add(SM9_Z256_POINT *R, const SM9_Z256_POINT *P, const SM9_Z2
 	sm9_z256_t X3, Y3, Z3, T1, T2, T3, T4;
 
 	if (sm9_z256_point_is_at_infinity(Q)) {
-		sm9_z256_point_copy(R, P);
+		*R = *P;
 		return;
 	}
 	if (sm9_z256_point_is_at_infinity(P)) {
-		sm9_z256_point_copy(R, Q);
+		*R = *Q;
 		return;
 	}
 
@@ -1929,7 +1924,7 @@ void sm9_z256_point_mul(SM9_Z256_POINT *R, const sm9_z256_t k, const SM9_Z256_PO
 	int i;
 
 	// T[i] = (i + 1) * P
-	sm9_z256_point_copy(&T[0], P);
+	T[0] = *P;
 
 	sm9_z256_point_dbl(&T[2-1], &T[1-1]);
 	sm9_z256_point_dbl(&T[4-1], &T[2-1]);
diff --git a/tests/sm9test.c b/tests/sm9test.c
index d8f2bd4f..c4bb2be6 100644
--- a/tests/sm9test.c
+++ b/tests/sm9test.c
@@ -659,7 +659,8 @@ int test_sm9_z256_ciphertext()
 	size_t len = 0;
 	int j = 1;
 
-	sm9_z256_point_copy(&C1, P1);
+	C1 = *P1;
+
 	if (sm9_ciphertext_to_der(&C1, c2, sizeof(c2), c3, &p, &len) != 1) goto err; ++j;
 	//printf("SM9_Z256_MAX_CIPHERTEXT_SIZE %zu\n", len);