diff --git a/client/builders.go b/client/builders.go
index 2f70e0f8..a947d6d6 100644
--- a/client/builders.go
+++ b/client/builders.go
@@ -3,6 +3,9 @@ package client
 import (
 	"crypto/md5"
 	"encoding/hex"
+	"math/rand"
+	"strconv"
+
 	"github.com/Mrs4s/MiraiGo/binary"
 	"github.com/Mrs4s/MiraiGo/binary/jce"
 	"github.com/Mrs4s/MiraiGo/client/pb"
@@ -18,8 +21,6 @@ import (
 	"github.com/Mrs4s/MiraiGo/protocol/tlv"
 	"github.com/Mrs4s/MiraiGo/utils"
 	"github.com/golang/protobuf/proto"
-	"math/rand"
-	"strconv"
 )
 
 var (
@@ -680,7 +681,7 @@ func (c *QQClient) buildSystemMsgNewFriendPacket() (uint16, []byte) {
 }
 
 // ProfileService.Pb.ReqSystemMsgAction.Group
-func (c *QQClient) buildSystemMsgGroupActionPacket(reqId, requester, group int64, isInvite, accept, block bool) (uint16, []byte) {
+func (c *QQClient) buildSystemMsgGroupActionPacket(reqId, requester, group int64, isInvite, accept, block bool, reason string) (uint16, []byte) {
 	seq := c.nextSeq()
 	req := &structmsg.ReqSystemMsgAction{
 		MsgType: 1,
@@ -709,6 +710,7 @@ func (c *QQClient) buildSystemMsgGroupActionPacket(reqId, requester, group int64
 			}(),
 			GroupCode: group,
 			Blacklist: block,
+			Msg:       reason,
 			Sig:       EmptyBytes,
 		},
 		Language: 1000,
diff --git a/client/client.go b/client/client.go
index ba1a8123..40b19af7 100644
--- a/client/client.go
+++ b/client/client.go
@@ -707,13 +707,18 @@ func (c *QQClient) FindGroup(code int64) *GroupInfo {
 	return nil
 }
 
-func (c *QQClient) SolveGroupJoinRequest(i interface{}, accept bool) {
+func (c *QQClient) SolveGroupJoinRequest(i interface{}, accept, block bool, reason string) {
+	if accept {
+		block = false
+		reason = ""
+	}
+
 	switch req := i.(type) {
 	case *UserJoinGroupRequest:
-		_, pkt := c.buildSystemMsgGroupActionPacket(req.RequestId, req.RequesterUin, req.GroupCode, false, accept, false)
+		_, pkt := c.buildSystemMsgGroupActionPacket(req.RequestId, req.RequesterUin, req.GroupCode, false, accept, block, reason)
 		_ = c.send(pkt)
 	case *GroupInvitedRequest:
-		_, pkt := c.buildSystemMsgGroupActionPacket(req.RequestId, req.InvitorUin, req.GroupCode, true, accept, false)
+		_, pkt := c.buildSystemMsgGroupActionPacket(req.RequestId, req.InvitorUin, req.GroupCode, true, accept, block, reason)
 		_ = c.send(pkt)
 	}
 }
diff --git a/client/entities.go b/client/entities.go
index b2f4a37b..5b29b49a 100644
--- a/client/entities.go
+++ b/client/entities.go
@@ -267,19 +267,19 @@ func (m *GroupMemberInfo) Manageable() bool {
 }
 
 func (r *UserJoinGroupRequest) Accept() {
-	r.client.SolveGroupJoinRequest(r, true)
+	r.client.SolveGroupJoinRequest(r, true, false, "")
 }
 
-func (r *UserJoinGroupRequest) Reject() {
-	r.client.SolveGroupJoinRequest(r, false)
+func (r *UserJoinGroupRequest) Reject(block bool, reason string) {
+	r.client.SolveGroupJoinRequest(r, false, block, reason)
 }
 
 func (r *GroupInvitedRequest) Accept() {
-	r.client.SolveGroupJoinRequest(r, true)
+	r.client.SolveGroupJoinRequest(r, true, false, "")
 }
 
-func (r *GroupInvitedRequest) Reject() {
-	r.client.SolveGroupJoinRequest(r, false)
+func (r *GroupInvitedRequest) Reject(block bool, reason string) {
+	r.client.SolveGroupJoinRequest(r, false, block, reason)
 }
 
 func (r *NewFriendRequest) Accept() {