diff --git a/ssl/statem/statem_gmtls.c b/ssl/statem/statem_gmtls.c
index b9944eb9..ee853457 100644
--- a/ssl/statem/statem_gmtls.c
+++ b/ssl/statem/statem_gmtls.c
@@ -492,10 +492,11 @@ static int gmtls_construct_ske_sm2dhe(SSL *s, unsigned char **p, int *l, int *al
 		SSLerr(SSL_F_GMTLS_CONSTRUCT_SKE_SM2DHE, ERR_R_EVP_LIB);
 		goto end;
 	}
-	if (!(id = X509_NAME_oneline(X509_get_subject_name(x509), NULL, 0))) {
-		SSLerr(SSL_F_GMTLS_CONSTRUCT_SKE_SM2DHE, ERR_R_EVP_LIB);
-		goto end;
-	}
+//	if (!(id = X509_NAME_oneline(X509_get_subject_name(x509), NULL, 0))) {
+//		SSLerr(SSL_F_GMTLS_CONSTRUCT_SKE_SM2DHE, ERR_R_EVP_LIB);
+//		goto end;
+//	}
+    id = SM2_DEFAULT_ID;
 	zlen = sizeof(z);
 	if (!SM2_compute_id_digest(EVP_sm3(), id, strlen(id), z, &zlen,
 		EVP_PKEY_get0_EC_KEY(pkey))) {
@@ -626,11 +627,12 @@ static int gmtls_process_ske_sm2dhe(SSL *s, PACKET *pkt, int *al)
 	}
 
 	/* prepare sm2 z value */
-	if (!(id = X509_NAME_oneline(
-		X509_get_subject_name(s->session->peer), NULL, 0))) {
-		SSLerr(SSL_F_GMTLS_PROCESS_SKE_SM2DHE, ERR_R_EVP_LIB);
-		goto end;
-	}
+//	if (!(id = X509_NAME_oneline(
+//		X509_get_subject_name(s->session->peer), NULL, 0))) {
+//		SSLerr(SSL_F_GMTLS_PROCESS_SKE_SM2DHE, ERR_R_EVP_LIB);
+//		goto end;
+//	}
+    id = SM2_DEFAULT_ID;
 	zlen = sizeof(z);
 	if (!SM2_compute_id_digest(EVP_sm3(), id, strlen(id), z, &zlen,
 		EVP_PKEY_get0_EC_KEY(pkey))) {
@@ -696,7 +698,7 @@ static unsigned char *gmtls_new_cert_packet(X509 *x, int *l)
 
 	p = ret;
 	l2n3(n, p);
-	*l = n;
+	*l = n+3;
 
 end:
 	return ret;
@@ -777,7 +779,7 @@ static int gmtls_construct_ske_sm2(SSL *s, unsigned char **p, int *l, int *al)
 			SSL3_RANDOM_SIZE) <= 0
 		|| EVP_SignUpdate(md_ctx, &(s->s3->server_random[0]),
 			SSL3_RANDOM_SIZE) <= 0
-		|| EVP_SignUpdate(md_ctx, buf, n+3) <= 0) {
+		|| EVP_SignUpdate(md_ctx, buf, n) <= 0) {
 		SSLerr(SSL_F_GMTLS_CONSTRUCT_SKE_SM2, ERR_R_EVP_LIB);
 		goto end;
 	}
@@ -887,7 +889,7 @@ static int gmtls_process_ske_sm2(SSL *s, PACKET *pkt, int *al)
 			SSL3_RANDOM_SIZE) <= 0
 		|| EVP_VerifyUpdate(md_ctx, &(s->s3->server_random[0]),
 			SSL3_RANDOM_SIZE) <= 0
-		|| EVP_VerifyUpdate(md_ctx, buf, n+3) <= 0) {
+		|| EVP_VerifyUpdate(md_ctx, buf, n) <= 0) {
 		SSLerr(SSL_F_GMTLS_PROCESS_SKE_SM2, ERR_R_EVP_LIB);
 		goto end;
 	}