diff --git a/internal/api/router.go b/internal/api/router.go
index d6bf4e130b..33f16ade32 100644
--- a/internal/api/router.go
+++ b/internal/api/router.go
@@ -1,7 +1,9 @@
 package api
 
 import (
+	"context"
 	"fmt"
+	"github.com/openimsdk/protocol/user"
 	"net/http"
 	"strings"
 
@@ -164,6 +166,7 @@ func newGinRouter(disCov discovery.SvcDiscoveryRegistry, config *Config) *gin.En
 		authRouterGroup.POST("/get_user_token", a.GetUserToken)
 		authRouterGroup.POST("/parse_token", a.ParseToken)
 		authRouterGroup.POST("/force_logout", a.ForceLogout)
+
 	}
 	// Third service
 	thirdGroup := r.Group("/third")
@@ -297,3 +300,16 @@ var Whitelist = []string{
 	"/auth/get_admin_token",
 	"/auth/parse_token",
 }
+
+func init() {
+
+	var uc user.UserClient
+	var g *gin.Engine
+	g.POST("/get_admin_token", New(uc, uc.AccountCheck))
+
+}
+
+func New[A, B, C any](c C, fn func(c C, ctx context.Context, req *A, opts ...grpc.CallOption) (*B, error)) func(c *gin.Context) {
+
+	return nil
+}
diff --git a/internal/rpc/conversation/conversation.go b/internal/rpc/conversation/conversation.go
index f534ca6dea..9fcd5abb1d 100644
--- a/internal/rpc/conversation/conversation.go
+++ b/internal/rpc/conversation/conversation.go
@@ -763,3 +763,32 @@ func (c *conversationServer) GetPinnedConversationIDs(ctx context.Context, req *
 	}
 	return &pbconversation.GetPinnedConversationIDsResp{ConversationIDs: conversationIDs}, nil
 }
+
+func (c *conversationServer) ClearUserConversationMsg(ctx context.Context, req *pbconversation.ClearUserConversationMsgReq) (*pbconversation.ClearUserConversationMsgResp, error) {
+	conversations, err := c.conversationDatabase.FindRandConversation(ctx, req.Timestamp, int(req.Limit))
+	if err != nil {
+		return nil, err
+	}
+	for _, conversation := range conversations {
+		if conversation.IsMsgDestruct == false || conversation.MsgDestructTime == 0 {
+			continue
+		}
+		rcpReq := &pbmsg.GetLastMessageSeqByTimeReq{ConversationID: conversation.ConversationID, Time: req.Timestamp - conversation.MsgDestructTime}
+		resp, err := pbmsg.GetLastMessageSeqByTime.Invoke(ctx, rcpReq)
+		if err != nil {
+			return nil, err
+		}
+		if resp.Seq == 0 {
+			continue
+		}
+		_, err = c.SetConversationMinSeq(ctx, &pbconversation.SetConversationMinSeqReq{
+			ConversationID: conversation.ConversationID,
+			OwnerUserID:    []string{conversation.OwnerUserID},
+			MinSeq:         resp.Seq + 1,
+		})
+		if err != nil {
+			return nil, err
+		}
+	}
+	return &pbconversation.ClearUserConversationMsgResp{}, nil
+}
diff --git a/internal/rpc/msg/clear.go b/internal/rpc/msg/clear.go
index 8d4bd0c8ee..eb7a4b7a60 100644
--- a/internal/rpc/msg/clear.go
+++ b/internal/rpc/msg/clear.go
@@ -10,7 +10,6 @@ import (
 	pbconv "github.com/openimsdk/protocol/conversation"
 	"github.com/openimsdk/protocol/msg"
 	"github.com/openimsdk/protocol/wrapperspb"
-	"github.com/openimsdk/tools/errs"
 	"github.com/openimsdk/tools/log"
 	"github.com/openimsdk/tools/mcontext"
 	"github.com/openimsdk/tools/utils/datautil"
@@ -20,16 +19,10 @@ import (
 )
 
 // hard delete in Database.
-func (m *msgServer) DestructMsgs(ctx context.Context, req *msg.DestructMsgsReq) (_ *msg.DestructMsgsResp, err error) {
+func (m *msgServer) DestructMsgs(ctx context.Context, req *msg.DestructMsgsReq) (*msg.DestructMsgsResp, error) {
 	if err := authverify.CheckAdmin(ctx, m.config.Share.IMAdminUserID); err != nil {
 		return nil, err
 	}
-	if req.Timestamp > time.Now().UnixMilli() {
-		return nil, errs.ErrArgs.WrapMsg("request millisecond timestamp error")
-	}
-	if req.Limit <= 0 {
-		return nil, errs.ErrArgs.WrapMsg("request limit error")
-	}
 	docs, err := m.MsgDatabase.GetRandBeforeMsg(ctx, req.Timestamp, int(req.Limit))
 	if err != nil {
 		return nil, err
@@ -66,7 +59,7 @@ func (m *msgServer) DestructMsgs(ctx context.Context, req *msg.DestructMsgsReq)
 }
 
 // soft delete for user self
-func (m *msgServer) ClearMsg(ctx context.Context, req *msg.ClearMsgReq) (_ *msg.ClearMsgResp, err error) {
+func (m *msgServer) ClearMsg(ctx context.Context, req *msg.ClearMsgReq) (*msg.ClearMsgResp, error) {
 	temp := convert.ConversationsPb2DB(req.Conversations)
 
 	batchNum := 100
@@ -128,3 +121,11 @@ func (m *msgServer) ClearMsg(ctx context.Context, req *msg.ClearMsgReq) (_ *msg.
 
 	return nil, nil
 }
+
+func (m *msgServer) GetLastMessageSeqByTime(ctx context.Context, req *msg.GetLastMessageSeqByTimeReq) (*msg.GetLastMessageSeqByTimeResp, error) {
+	seq, err := m.MsgDatabase.GetLastMessageSeqByTime(ctx, req.ConversationID, req.Time)
+	if err != nil {
+		return nil, err
+	}
+	return &msg.GetLastMessageSeqByTimeResp{Seq: seq}, nil
+}
diff --git a/internal/tools/msg.go b/internal/tools/msg.go
index 46f1573f28..5226496450 100644
--- a/internal/tools/msg.go
+++ b/internal/tools/msg.go
@@ -16,7 +16,7 @@ func (c *cronServer) deleteMsg() {
 	ctx := mcontext.SetOperationID(c.ctx, operationID)
 	log.ZDebug(ctx, "Destruct chat records", "deltime", deltime, "timestamp", deltime.UnixMilli())
 	const (
-		deleteCount = 20
+		deleteCount = 200
 		deleteLimit = 50
 	)
 	var count int
diff --git a/internal/tools/s3.go b/internal/tools/s3.go
index 3b0122c84e..469b0d0cb3 100644
--- a/internal/tools/s3.go
+++ b/internal/tools/s3.go
@@ -11,25 +11,69 @@ import (
 
 func (c *cronServer) clearS3() {
 	start := time.Now()
-	executeNum := 10
-	// number of pagination. if need modify, need update value in third.DeleteOutdatedData
-	pageShowNumber := 500
 	deleteTime := start.Add(-time.Hour * 24 * time.Duration(c.config.CronTask.FileExpireTime))
 	operationID := fmt.Sprintf("cron_s3_%d_%d", os.Getpid(), deleteTime.UnixMilli())
 	ctx := mcontext.SetOperationID(c.ctx, operationID)
 	log.ZDebug(ctx, "deleteoutDatedData", "deletetime", deleteTime, "timestamp", deleteTime.UnixMilli())
+	const (
+		deleteCount = 200
+		deleteLimit = 100
+	)
+
 	var count int
-	for i := 1; i <= executeNum; i++ {
-		ctx := mcontext.SetOperationID(c.ctx, fmt.Sprintf("%s_%d", operationID, i))
-		resp, err := c.thirdClient.DeleteOutdatedData(ctx, &third.DeleteOutdatedDataReq{ExpireTime: deleteTime.UnixMilli(), ObjectGroup: c.config.CronTask.DeleteObjectType, Limit: int32(pageShowNumber)})
+	for i := 1; i <= deleteCount; i++ {
+		resp, err := c.thirdClient.DeleteOutdatedData(ctx, &third.DeleteOutdatedDataReq{ExpireTime: deleteTime.UnixMilli(), ObjectGroup: c.config.CronTask.DeleteObjectType, Limit: deleteLimit})
 		if err != nil {
 			log.ZError(ctx, "cron deleteoutDatedData failed", err)
 			return
 		}
 		count += int(resp.Count)
-		if resp.Count < int32(pageShowNumber) {
+		if resp.Count < deleteLimit {
 			break
 		}
 	}
 	log.ZDebug(ctx, "cron deleteoutDatedData success", "deltime", deleteTime, "cont", time.Since(start), "count", count)
 }
+
+//	var req *third.DeleteOutdatedDataReq
+//	count1, err := ExtractField(ctx, c.thirdClient.DeleteOutdatedData, req, (*third.DeleteOutdatedDataResp).GetCount)
+//
+//	c.thirdClient.DeleteOutdatedData(ctx, &third.DeleteOutdatedDataReq{})
+//	msggateway.GetUsersOnlineStatusCaller.Invoke(ctx, &msggateway.GetUsersOnlineStatusReq{})
+//
+//	var cli ThirdClient
+//
+//	c111, err := cli.DeleteOutdatedData(ctx, 100)
+//
+//	cli.ThirdClient.DeleteOutdatedData(ctx, &third.DeleteOutdatedDataReq{})
+//
+//	cli.AuthSign(ctx, &third.AuthSignReq{})
+//
+//	cli.SetAppBadge()
+//
+//}
+//
+//func extractField[A, B, C any](ctx context.Context, fn func(ctx context.Context, req *A, opts ...grpc.CallOption) (*B, error), req *A, get func(*B) C) (C, error) {
+//	resp, err := fn(ctx, req)
+//	if err != nil {
+//		var c C
+//		return c, err
+//	}
+//	return get(resp), nil
+//}
+//
+//func ignore(_ any, err error) error {
+//	return err
+//}
+//
+//type ThirdClient struct {
+//	third.ThirdClient
+//}
+//
+//func (c *ThirdClient) DeleteOutdatedData(ctx context.Context, expireTime int64) (int32, error) {
+//	return extractField(ctx, c.ThirdClient.DeleteOutdatedData, &third.DeleteOutdatedDataReq{ExpireTime: expireTime}, (*third.DeleteOutdatedDataResp).GetCount)
+//}
+//
+//func (c *ThirdClient) DeleteOutdatedData1(ctx context.Context, expireTime int64) error {
+//	return ignore(c.ThirdClient.DeleteOutdatedData(ctx, &third.DeleteOutdatedDataReq{ExpireTime: expireTime}))
+//}
diff --git a/internal/tools/user_msg.go b/internal/tools/user_msg.go
index 52a2b6bdce..3d4ca40d3f 100644
--- a/internal/tools/user_msg.go
+++ b/internal/tools/user_msg.go
@@ -3,7 +3,6 @@ package tools
 import (
 	"fmt"
 	pbconversation "github.com/openimsdk/protocol/conversation"
-	"github.com/openimsdk/protocol/msg"
 	"github.com/openimsdk/tools/log"
 	"github.com/openimsdk/tools/mcontext"
 	"os"
@@ -14,18 +13,22 @@ func (c *cronServer) clearUserMsg() {
 	now := time.Now()
 	operationID := fmt.Sprintf("cron_user_msg_%d_%d", os.Getpid(), now.UnixMilli())
 	ctx := mcontext.SetOperationID(c.ctx, operationID)
-	log.ZDebug(ctx, "clear msg cron start")
-	conversations, err := c.conversationClient.GetConversationsNeedClearMsg(ctx, &pbconversation.GetConversationsNeedClearMsgReq{})
-	if err != nil {
-		log.ZError(ctx, "Get conversation need Destruct msgs failed.", err)
-		return
+	log.ZDebug(ctx, "clear user msg cron start")
+	const (
+		deleteCount = 200
+		deleteLimit = 100
+	)
+	var count int
+	for i := 1; i <= deleteCount; i++ {
+		resp, err := c.conversationClient.ClearUserConversationMsg(ctx, &pbconversation.ClearUserConversationMsgReq{Timestamp: now.UnixMilli(), Limit: deleteLimit})
+		if err != nil {
+			log.ZError(ctx, "ClearUserConversationMsg failed.", err)
+			return
+		}
+		count += int(resp.Count)
+		if resp.Count < deleteLimit {
+			break
+		}
 	}
-
-	_, err = c.msgClient.ClearMsg(ctx, &msg.ClearMsgReq{Conversations: conversations.Conversations})
-	if err != nil {
-		log.ZError(ctx, "Clear Msg failed.", err)
-		return
-	}
-
-	log.ZDebug(ctx, "clear msg cron task completed", "cont", time.Since(now))
+	log.ZDebug(ctx, "clear user msg cron task completed", "cont", time.Since(now), "count", count)
 }
diff --git a/pkg/common/storage/controller/conversation.go b/pkg/common/storage/controller/conversation.go
index bf41cce957..d4088e0c0e 100644
--- a/pkg/common/storage/controller/conversation.go
+++ b/pkg/common/storage/controller/conversation.go
@@ -74,6 +74,8 @@ type ConversationDatabase interface {
 	GetNotNotifyConversationIDs(ctx context.Context, userID string) ([]string, error)
 	// GetPinnedConversationIDs gets pinned conversationIDs by userID
 	GetPinnedConversationIDs(ctx context.Context, userID string) ([]string, error)
+	// FindRandConversation finds random conversations based on the specified timestamp and limit.
+	FindRandConversation(ctx context.Context, ts int64, limit int) ([]*relationtb.Conversation, error)
 }
 
 func NewConversationDatabase(conversation database.Conversation, cache cache.ConversationCache, tx tx.Tx) ConversationDatabase {
@@ -401,3 +403,7 @@ func (c *conversationDatabase) GetPinnedConversationIDs(ctx context.Context, use
 	}
 	return conversationIDs, nil
 }
+
+func (c *conversationDatabase) FindRandConversation(ctx context.Context, ts int64, limit int) ([]*relationtb.Conversation, error) {
+	return c.conversationDB.FindRandConversation(ctx, ts, limit)
+}
diff --git a/pkg/common/storage/controller/msg.go b/pkg/common/storage/controller/msg.go
index 88089f1a09..c29544c333 100644
--- a/pkg/common/storage/controller/msg.go
+++ b/pkg/common/storage/controller/msg.go
@@ -103,6 +103,8 @@ type CommonMsgDatabase interface {
 	SetUserConversationsMinSeq(ctx context.Context, conversationID string, userID string, seq int64) error
 
 	DeleteDoc(ctx context.Context, docID string) error
+
+	GetLastMessageSeqByTime(ctx context.Context, conversationID string, time int64) (int64, error)
 }
 
 func NewCommonMsgDatabase(msgDocModel database.Msg, msg cache.MsgCache, seqUser cache.SeqUser, seqConversation cache.SeqConversationCache, kafkaConf *config.Kafka) (CommonMsgDatabase, error) {
@@ -1016,3 +1018,7 @@ func (db *commonMsgDatabase) GetMaxSeqsWithTime(ctx context.Context, conversatio
 func (db *commonMsgDatabase) DeleteDoc(ctx context.Context, docID string) error {
 	return db.msgDocDatabase.DeleteDoc(ctx, docID)
 }
+
+func (db *commonMsgDatabase) GetLastMessageSeqByTime(ctx context.Context, conversationID string, time int64) (int64, error) {
+	return db.msgDocDatabase.GetLastMessageSeqByTime(ctx, conversationID, time)
+}
diff --git a/pkg/common/storage/database/conversation.go b/pkg/common/storage/database/conversation.go
index 30ca01ee71..1fb53cfed2 100644
--- a/pkg/common/storage/database/conversation.go
+++ b/pkg/common/storage/database/conversation.go
@@ -42,4 +42,5 @@ type Conversation interface {
 	GetConversationIDsNeedDestruct(ctx context.Context) ([]*model.Conversation, error)
 	GetConversationNotReceiveMessageUserIDs(ctx context.Context, conversationID string) ([]string, error)
 	FindConversationUserVersion(ctx context.Context, userID string, version uint, limit int) (*model.VersionLog, error)
+	FindRandConversation(ctx context.Context, ts int64, limit int) ([]*model.Conversation, error)
 }
diff --git a/pkg/common/storage/database/mgo/conversation.go b/pkg/common/storage/database/mgo/conversation.go
index 10e223c893..851ec99c40 100644
--- a/pkg/common/storage/database/mgo/conversation.go
+++ b/pkg/common/storage/database/mgo/conversation.go
@@ -228,3 +228,35 @@ func (c *ConversationMgo) GetConversationNotReceiveMessageUserIDs(ctx context.Co
 func (c *ConversationMgo) FindConversationUserVersion(ctx context.Context, userID string, version uint, limit int) (*model.VersionLog, error) {
 	return c.version.FindChangeLog(ctx, userID, version, limit)
 }
+
+func (c *ConversationMgo) FindRandConversation(ctx context.Context, ts int64, limit int) ([]*model.Conversation, error) {
+	pipeline := []bson.M{
+		{
+			"$match": bson.M{
+				"is_msg_destruct":   true,
+				"msg_destruct_time": bson.M{"$ne": 0},
+			},
+		},
+		{
+			"$addFields": bson.M{
+				"next_msg_destruct_timestamp": bson.M{
+					"$add": []any{
+						bson.M{
+							"$toLong": "$latest_msg_destruct_time",
+						}, "$msg_destruct_time"},
+				},
+			},
+		},
+		{
+			"$match": bson.M{
+				"next_msg_destruct_timestamp": bson.M{"$lt": ts},
+			},
+		},
+		{
+			"$sample": bson.M{
+				"size": limit,
+			},
+		},
+	}
+	return mongoutil.Aggregate[*model.Conversation](ctx, c.coll, pipeline)
+}
diff --git a/pkg/common/storage/database/mgo/msg.go b/pkg/common/storage/database/mgo/msg.go
index 937dbae1dd..e014654663 100644
--- a/pkg/common/storage/database/mgo/msg.go
+++ b/pkg/common/storage/database/mgo/msg.go
@@ -1290,7 +1290,9 @@ func (m *MsgMgo) GetRandBeforeMsg(ctx context.Context, ts int64, limit int) ([]*
 			},
 		},
 		{
-			"$sample": limit,
+			"$sample": bson.M{
+				"size": limit,
+			},
 		},
 	})
 }
@@ -1307,53 +1309,56 @@ func (m *MsgMgo) DeleteMsgByIndex(ctx context.Context, docID string, index []int
 	return mongoutil.UpdateOne(ctx, m.coll, bson.M{"doc_id": docID}, bson.M{"$set": set}, true)
 }
 
-//func (m *MsgMgo) ClearMsg(ctx context.Context, t time.Time) (int64, error) {
-//	ts := t.UnixMilli()
-//	var count int64
-//	for {
-//		msgs, err := m.GetBeforeMsg(ctx, ts, 100)
-//		if err != nil {
-//			return count, err
-//		}
-//		if len(msgs) == 0 {
-//			return count, nil
-//		}
-//		for _, msg := range msgs {
-//			num, err := m.deleteOneMsg(ctx, ts, msg)
-//			count += num
-//			if err != nil {
-//				return count, err
-//			}
-//		}
-//	}
-//}
-
 func (m *MsgMgo) DeleteDoc(ctx context.Context, docID string) error {
 	return mongoutil.DeleteOne(ctx, m.coll, bson.M{"doc_id": docID})
 }
 
-//func (m *MsgMgo) DeleteDocMsg(ctx context.Context, ts int64, doc *relation.MsgDocModel) (int64, error) {
-//	var notNull int
-//	index := make([]int, 0, len(doc.Msg))
-//	for i, message := range doc.Msg {
-//		if message.Msg != nil {
-//			notNull++
-//			if message.Msg.SendTime < ts {
-//				index = append(index, i)
-//			}
-//		}
-//	}
-//	if len(index) == 0 {
-//		return 0, errs.New("no msg to delete").WrapMsg("deleteOneMsg", "docID", doc.DocID)
-//	}
-//	if len(index) == notNull {
-//		if err := m.DeleteDoc(ctx, doc.DocID); err != nil {
-//			return 0, err
-//		}
-//	} else {
-//		if err := m.setNullMsg(ctx, doc.DocID, index); err != nil {
-//			return 0, err
-//		}
-//	}
-//	return int64(len(index)), nil
-//}
+func (m *MsgMgo) GetLastMessageSeqByTime(ctx context.Context, conversationID string, time int64) (int64, error) {
+	pipeline := []bson.M{
+		{
+			"$match": bson.M{
+				"doc_id": bson.M{
+					"$regex": fmt.Sprintf("^%s:", conversationID),
+				},
+			},
+		},
+		{
+			"$match": bson.M{
+				"msgs.msg.send_time": bson.M{
+					"msgs.msg.send_time": bson.M{
+						"$lte": time,
+					},
+				},
+			},
+		},
+		{
+			"$sort": bson.M{
+				"_id": -1,
+			},
+		},
+		{
+			"$limit": 1,
+		},
+		{
+			"$project": bson.M{
+				"_id":                0,
+				"msgs.msg.send_time": 1,
+				"msgs.msg.seq":       1,
+			},
+		},
+	}
+	res, err := mongoutil.Aggregate[*model.MsgDocModel](ctx, m.coll, pipeline)
+	if err != nil {
+		return 0, err
+	}
+	if len(res) == 0 {
+		return 0, nil
+	}
+	var seq int64
+	for _, v := range res[0].Msg {
+		if v.Msg.SendTime <= time {
+			seq = v.Msg.Seq
+		}
+	}
+	return seq, nil
+}
diff --git a/pkg/common/storage/database/mgo/msg_test.go b/pkg/common/storage/database/mgo/msg_test.go
index eff847d262..7218ef1ad1 100644
--- a/pkg/common/storage/database/mgo/msg_test.go
+++ b/pkg/common/storage/database/mgo/msg_test.go
@@ -15,10 +15,10 @@ import (
 )
 
 func TestName1(t *testing.T) {
-	ctx, cancel := context.WithTimeout(context.Background(), time.Second*300)
-	defer cancel()
-	cli := Result(mongo.Connect(ctx, options.Client().ApplyURI("mongodb://openIM:openIM123@172.16.8.66:37017/openim_v3?maxPoolSize=100").SetConnectTimeout(5*time.Second)))
-
+	//ctx, cancel := context.WithTimeout(context.Background(), time.Second*300)
+	//defer cancel()
+	//cli := Result(mongo.Connect(ctx, options.Client().ApplyURI("mongodb://openIM:openIM123@172.16.8.66:37017/openim_v3?maxPoolSize=100").SetConnectTimeout(5*time.Second)))
+	//
 	//v := &MsgMgo{
 	//	coll: cli.Database("openim_v3").Collection("msg3"),
 	//}
@@ -44,16 +44,16 @@ func TestName1(t *testing.T) {
 	//}
 	//
 	//t.Log(total)
-
-	msg, err := NewMsgMongo(cli.Database("openim_v3"))
-	if err != nil {
-		panic(err)
-	}
-	res, err := msg.GetBeforeMsg(ctx, time.Now().UnixMilli(), []string{"1:0"}, 1000)
-	if err != nil {
-		panic(err)
-	}
-	t.Log(len(res))
+	//
+	//msg, err := NewMsgMongo(cli.Database("openim_v3"))
+	//if err != nil {
+	//	panic(err)
+	//}
+	//res, err := msg.GetBeforeMsg(ctx, time.Now().UnixMilli(), []string{"1:0"}, 1000)
+	//if err != nil {
+	//	panic(err)
+	//}
+	//t.Log(len(res))
 }
 
 func TestName10(t *testing.T) {
@@ -95,13 +95,20 @@ func TestName4(t *testing.T) {
 	defer cancel()
 	cli := Result(mongo.Connect(ctx, options.Client().ApplyURI("mongodb://openIM:openIM123@172.16.8.66:37017/openim_v3?maxPoolSize=100").SetConnectTimeout(5*time.Second)))
 
-	msg, err := NewMsgMongo(cli.Database("openim_v3"))
+	msg, err := NewConversationMongo(cli.Database("openim_v3"))
 	if err != nil {
 		panic(err)
 	}
-	res, err := msg.GetBeforeMsg(ctx, time.Now().UnixMilli(), []string{"1:0"}, 1000)
+	ts := time.Now().UnixMilli()
+	t.Log(ts)
+	res, err := msg.FindRandConversation(ctx, ts, 10)
 	if err != nil {
 		panic(err)
 	}
-	t.Log(len(res))
+	t.Log(res)
+}
+
+func TestName5(t *testing.T) {
+	var v time.Time
+	t.Log(v.UnixMilli())
 }
diff --git a/pkg/common/storage/database/msg.go b/pkg/common/storage/database/msg.go
index 17aaf23429..abb2a44c2f 100644
--- a/pkg/common/storage/database/msg.go
+++ b/pkg/common/storage/database/msg.go
@@ -48,4 +48,6 @@ type Msg interface {
 	GetRandBeforeMsg(ctx context.Context, ts int64, limit int) ([]*model.MsgDocModel, error)
 
 	GetRandDocIDs(ctx context.Context, limit int) ([]string, error)
+
+	GetLastMessageSeqByTime(ctx context.Context, conversationID string, time int64) (int64, error)
 }