diff --git a/.github/workflows/cleanup-after-milestone-prs-merged.yml b/.github/workflows/cleanup-after-milestone-prs-merged.yml
index 4e9cc403d..8a3e381d6 100644
--- a/.github/workflows/cleanup-after-milestone-prs-merged.yml
+++ b/.github/workflows/cleanup-after-milestone-prs-merged.yml
@@ -11,7 +11,7 @@ jobs:
 
     steps:
     - name: Checkout repository
-      uses: actions/checkout@v3
+      uses: actions/checkout@v4.2.0
 
     - name: Get the PR title and extract PR numbers
       id: extract_pr_numbers
@@ -36,15 +36,6 @@ jobs:
           echo "proceed=false" >> $GITHUB_OUTPUT
         fi
 
-    - name: Delete branch after PR close
-      if: steps.extract_pr_numbers.outputs.proceed == 'true' || contains(github.event.pull_request.labels.*.name, 'milestone-merge')
-      run: |
-        BRANCH_NAME="${{ github.event.pull_request.head.ref }}"
-        echo "Branch to delete: $BRANCH_NAME"
-        git push origin --delete "$BRANCH_NAME"
-      env:
-        GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
-
     - name: Use extracted PR numbers and label PRs
       if: (steps.extract_pr_numbers.outputs.proceed == 'true' || contains(github.event.pull_request.labels.*.name, 'milestone-merge')) && github.event.pull_request.merged == true
       run: |
@@ -63,3 +54,12 @@ jobs:
         done
       env:
         GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+
+    - name: Delete branch after PR close
+      if: steps.extract_pr_numbers.outputs.proceed == 'true' || contains(github.event.pull_request.labels.*.name, 'milestone-merge')
+      run: |
+        BRANCH_NAME="${{ github.event.pull_request.head.ref }}"
+        echo "Branch to delete: $BRANCH_NAME"
+        git push origin --delete "$BRANCH_NAME"
+      env:
+        GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
\ No newline at end of file
diff --git a/go.mod b/go.mod
index f3535b30d..4e8fcbb4b 100644
--- a/go.mod
+++ b/go.mod
@@ -57,4 +57,5 @@ require (
 	golang.org/x/sys v0.18.0 // indirect
 	golang.org/x/text v0.14.0 // indirect
 	google.golang.org/genproto/googleapis/rpc v0.0.0-20240318140521-94a12d6c2237 // indirect
+	gopkg.in/yaml.v3 v3.0.1 // indirect
 )
diff --git a/internal/conversation_msg/api.go b/internal/conversation_msg/api.go
index 282c739cd..8a6af4e6e 100644
--- a/internal/conversation_msg/api.go
+++ b/internal/conversation_msg/api.go
@@ -520,12 +520,16 @@ func (c *Conversation) SendMessage(ctx context.Context, s *sdk_struct.MsgStruct,
 			break
 		}
 		name := s.FileElem.FileName
+
 		if name == "" {
 			name = s.FileElem.FilePath
 		}
 		if name == "" {
 			name = fmt.Sprintf("msg_file_%s.unknown", s.ClientMsgID)
 		}
+
+		delFile = append(delFile, s.FileElem.FilePath)
+
 		res, err := c.file.UploadFile(ctx, &file.UploadFileReq{
 			ContentType: content_type.GetType(s.FileElem.FileType, filepath.Ext(s.FileElem.FilePath), filepath.Ext(s.FileElem.FileName)),
 			Filepath:    s.FileElem.FilePath,
@@ -657,7 +661,7 @@ func (c *Conversation) SendMessageNotOss(ctx context.Context, s *sdk_struct.MsgS
 }
 
 func (c *Conversation) sendMessageToServer(ctx context.Context, s *sdk_struct.MsgStruct, lc *model_struct.LocalConversation, callback open_im_sdk_callback.SendMsgCallBack,
-	delFile []string, offlinePushInfo *sdkws.OfflinePushInfo, options map[string]bool, isOnlineOnly bool) (*sdk_struct.MsgStruct, error) {
+	delFiles []string, offlinePushInfo *sdkws.OfflinePushInfo, options map[string]bool, isOnlineOnly bool) (*sdk_struct.MsgStruct, error) {
 	if isOnlineOnly {
 		utils.SetSwitchFromOptions(options, constant.IsHistory, false)
 		utils.SetSwitchFromOptions(options, constant.IsPersistent, false)
@@ -709,13 +713,14 @@ func (c *Conversation) sendMessageToServer(ctx context.Context, s *sdk_struct.Ms
 	s.ServerMsgID = sendMsgResp.ServerMsgID
 	go func() {
 		//remove media cache file
-		for _, v := range delFile {
-			err := os.Remove(v)
+		for _, file := range delFiles {
+			err := os.Remove(file)
 			if err != nil {
-				// log.Error("", "remove failed,", err.Error(), v)
+				log.ZError(ctx, "delete temp File is failed", err, "filePath", file)
 			}
-			// log.Debug("", "remove file: ", v)
+			// log.ZDebug(ctx, "remove temp file:", "file", file)
 		}
+
 		c.updateMsgStatusAndTriggerConversation(ctx, sendMsgResp.ClientMsgID, sendMsgResp.ServerMsgID, sendMsgResp.SendTime, constant.MsgStatusSendSuccess, s, lc, isOnlineOnly)
 	}()
 	return s, nil
diff --git a/internal/conversation_msg/message_check.go b/internal/conversation_msg/message_check.go
index 5c14319b6..88f3e3c53 100644
--- a/internal/conversation_msg/message_check.go
+++ b/internal/conversation_msg/message_check.go
@@ -377,6 +377,7 @@ func (c *Conversation) groupHandle(ctx context.Context, self, others []*model_st
 	}
 	for _, chatLog := range allMessage {
 		if g, ok := groupMap[chatLog.SendID]; ok { // If group member info is successfully retrieved
+			log.ZDebug(ctx, "find in GetGroupMemberNameAndFaceURL", "sendID", chatLog.SendID, "faceURL", g.FaceURL, "nickName", g.Nickname)
 			if g.FaceURL != "" && g.Nickname != "" {
 				chatLog.SenderFaceURL = g.FaceURL
 				chatLog.SenderNickname = g.Nickname
@@ -386,6 +387,7 @@ func (c *Conversation) groupHandle(ctx context.Context, self, others []*model_st
 			if err != nil {
 				log.ZWarn(ctx, "getUserNameAndFaceURL error", err, "senderID", chatLog.SendID)
 			} else if faceURL != "" && name != "" {
+				log.ZDebug(ctx, "find in getUserNameAndFaceURL", "sendID", chatLog.SendID, "faceURL", faceURL, "nickName", name)
 				chatLog.SenderFaceURL = faceURL
 				chatLog.SenderNickname = name
 			}
diff --git a/internal/group/cache.go b/internal/group/cache.go
index 6ef8a1e6f..8e9e5c397 100644
--- a/internal/group/cache.go
+++ b/internal/group/cache.go
@@ -3,6 +3,7 @@ package group
 import (
 	"context"
 	"github.com/openimsdk/openim-sdk-core/v3/pkg/db/model_struct"
+	"github.com/openimsdk/tools/log"
 	"github.com/openimsdk/tools/utils/datautil"
 )
 
@@ -20,13 +21,14 @@ func (g *Group) GetGroupMembersInfoFunc(ctx context.Context, groupID string, use
 
 	for _, userID := range userIDs {
 		key := g.buildGroupMemberKey(groupID, userID)
-		if member, ok := g.groupMemberCache.Load(groupID); ok {
-			res[key] = member
+		if member, ok := g.groupMemberCache.Load(key); ok {
+			res[userID] = member
 		} else {
 			missingKeys = append(missingKeys, userIDs...)
 		}
 	}
 
+	log.ZDebug(ctx, "GetGroupMembersInfoFunc fetch", "missingKeys", missingKeys)
 	fetchData, err := fetchFunc(ctx, missingKeys)
 	if err != nil {
 		return nil, err
@@ -34,7 +36,7 @@ func (g *Group) GetGroupMembersInfoFunc(ctx context.Context, groupID string, use
 
 	for i, data := range fetchData {
 		key := g.buildGroupMemberKey(groupID, data.UserID)
-		res[key] = fetchData[i]
+		res[data.UserID] = fetchData[i]
 		g.groupMemberCache.Store(key, fetchData[i])
 	}
 
diff --git a/internal/group/group.go b/internal/group/group.go
index 36d7248ad..3783a3c72 100644
--- a/internal/group/group.go
+++ b/internal/group/group.go
@@ -156,6 +156,7 @@ func (g *Group) initSyncer() {
 			return g.db.DeleteGroupMember(ctx, value.GroupID, value.UserID)
 		}),
 		syncer.WithUpdate[*model_struct.LocalGroupMember, group.GetGroupMemberListResp, [2]string](func(ctx context.Context, server, local *model_struct.LocalGroupMember) error {
+			g.groupMemberCache.Delete(g.buildGroupMemberKey(server.GroupID, server.UserID))
 			return g.db.UpdateGroupMember(ctx, server)
 		}),
 		syncer.WithUUID[*model_struct.LocalGroupMember, group.GetGroupMemberListResp, [2]string](func(value *model_struct.LocalGroupMember) [2]string {
diff --git a/internal/interaction/msg_sync.go b/internal/interaction/msg_sync.go
index ebd65247e..4b3e9d40f 100644
--- a/internal/interaction/msg_sync.go
+++ b/internal/interaction/msg_sync.go
@@ -88,8 +88,15 @@ func (m *MsgSyncer) loadSeq(ctx context.Context) error {
 		log.ZError(ctx, "get conversation id list failed", err)
 		return err
 	}
+
 	if len(conversationIDList) == 0 {
-		m.reinstalled = true
+		version, err := m.db.GetAppSDKVersion(ctx)
+		if err != nil {
+			return err
+		}
+		if !version.Installed {
+			m.reinstalled = true
+		}
 	}
 
 	// TODO With a large number of sessions, this could potentially cause blocking and needs optimization.
@@ -248,6 +255,11 @@ func (m *MsgSyncer) compareSeqsAndBatchSync(ctx context.Context, maxSeqToSync ma
 			}
 		}
 		defer func() {
+			if err := m.db.SetAppSDKVersion(ctx, &model_struct.LocalAppSDKVersion{
+				Installed: true,
+			}); err != nil {
+				log.ZError(ctx, "SetAppSDKVersion err", err)
+			}
 			m.reinstalled = false
 		}()
 		_ = m.syncAndTriggerReinstallMsgs(m.ctx, needSyncSeqMap, pullNums)
@@ -269,24 +281,24 @@ func (m *MsgSyncer) compareSeqsAndBatchSync(ctx context.Context, maxSeqToSync ma
 
 // startSync checks if the sync is already in progress.
 // If syncing is in progress, it returns false. Otherwise, it starts syncing and returns true.
-func (ms *MsgSyncer) startSync() bool {
-	ms.isSyncingLock.Lock()
-	defer ms.isSyncingLock.Unlock()
+func (m *MsgSyncer) startSync() bool {
+	m.isSyncingLock.Lock()
+	defer m.isSyncingLock.Unlock()
 
-	if ms.isSyncing {
+	if m.isSyncing {
 		// If already syncing, return false
 		return false
 	}
 
 	// Set syncing to true and start the sync
-	ms.isSyncing = true
+	m.isSyncing = true
 
 	// Create a goroutine that waits for 5 seconds and then sets isSyncing to false
 	go func() {
 		time.Sleep(5 * time.Second)
-		ms.isSyncingLock.Lock()
-		ms.isSyncing = false
-		ms.isSyncingLock.Unlock()
+		m.isSyncingLock.Lock()
+		m.isSyncing = false
+		m.isSyncingLock.Unlock()
 	}()
 
 	return true
diff --git a/internal/relation/relation.go b/internal/relation/relation.go
index a05869a25..962291cea 100644
--- a/internal/relation/relation.go
+++ b/internal/relation/relation.go
@@ -36,7 +36,7 @@ type Relation struct {
 	db                 db_interface.DataBase
 	user               *user.User
 	friendSyncer       *syncer.Syncer[*model_struct.LocalFriend, relation.GetPaginationFriendsResp, [2]string]
-	blockSyncer        *syncer.Syncer[*model_struct.LocalBlack, syncer.NoResp, [2]string]
+	blackSyncer        *syncer.Syncer[*model_struct.LocalBlack, syncer.NoResp, [2]string]
 	requestRecvSyncer  *syncer.Syncer[*model_struct.LocalFriendRequest, syncer.NoResp, [2]string]
 	requestSendSyncer  *syncer.Syncer[*model_struct.LocalFriendRequest, syncer.NoResp, [2]string]
 	conversationCh     chan common.Cmd2Value
@@ -53,6 +53,7 @@ func (r *Relation) initSyncer() {
 			return r.db.DeleteFriendDB(ctx, value.FriendUserID)
 		}),
 		syncer.WithUpdate[*model_struct.LocalFriend, relation.GetPaginationFriendsResp, [2]string](func(ctx context.Context, server, local *model_struct.LocalFriend) error {
+			r.user.UserCache.Delete(server.FriendUserID)
 			return r.db.UpdateFriend(ctx, server)
 		}),
 		syncer.WithUUID[*model_struct.LocalFriend, relation.GetPaginationFriendsResp, [2]string](func(value *model_struct.LocalFriend) [2]string {
@@ -132,7 +133,7 @@ func (r *Relation) initSyncer() {
 		syncer.WithFullSyncLimit[*model_struct.LocalFriend, relation.GetPaginationFriendsResp, [2]string](friendSyncLimit),
 	)
 
-	r.blockSyncer = syncer.New[*model_struct.LocalBlack, syncer.NoResp, [2]string](func(ctx context.Context, value *model_struct.LocalBlack) error {
+	r.blackSyncer = syncer.New[*model_struct.LocalBlack, syncer.NoResp, [2]string](func(ctx context.Context, value *model_struct.LocalBlack) error {
 		return r.db.InsertBlack(ctx, value)
 	}, func(ctx context.Context, value *model_struct.LocalBlack) error {
 		return r.db.DeleteBlack(ctx, value.BlockUserID)
diff --git a/internal/relation/sync.go b/internal/relation/sync.go
index 0390be2f8..48a515101 100644
--- a/internal/relation/sync.go
+++ b/internal/relation/sync.go
@@ -104,7 +104,7 @@ func (r *Relation) SyncAllBlackList(ctx context.Context) error {
 		return err
 	}
 	log.ZDebug(ctx, "black from local", "data", localData)
-	return r.blockSyncer.Sync(ctx, datautil.Batch(ServerBlackToLocalBlack, serverData), localData, nil)
+	return r.blackSyncer.Sync(ctx, datautil.Batch(ServerBlackToLocalBlack, serverData), localData, nil)
 }
 
 func (r *Relation) SyncAllBlackListWithoutNotice(ctx context.Context) error {
@@ -118,7 +118,7 @@ func (r *Relation) SyncAllBlackListWithoutNotice(ctx context.Context) error {
 		return err
 	}
 	log.ZDebug(ctx, "black from local", "data", localData)
-	return r.blockSyncer.Sync(ctx, datautil.Batch(ServerBlackToLocalBlack, serverData), localData, nil, false, true)
+	return r.blackSyncer.Sync(ctx, datautil.Batch(ServerBlackToLocalBlack, serverData), localData, nil, false, true)
 }
 
 func (r *Relation) GetDesignatedFriends(ctx context.Context, friendIDs []string) ([]*sdkws.FriendInfo, error) {
diff --git a/internal/user/user.go b/internal/user/user.go
index e9f1044e7..a35a2c51b 100644
--- a/internal/user/user.go
+++ b/internal/user/user.go
@@ -69,6 +69,7 @@ func (u *User) initSyncer() {
 			return fmt.Errorf("not support delete user %s", value.UserID)
 		},
 		func(ctx context.Context, serverUser, localUser *model_struct.LocalUser) error {
+			u.UserCache.Delete(localUser.UserID)
 			return u.DataBase.UpdateLoginUser(context.Background(), serverUser)
 		},
 		func(user *model_struct.LocalUser) string {
diff --git a/pkg/db/group_member_model.go b/pkg/db/group_member_model.go
index 52bf5ea53..0d1fcb006 100644
--- a/pkg/db/group_member_model.go
+++ b/pkg/db/group_member_model.go
@@ -54,7 +54,7 @@ func (d *DataBase) GetGroupSomeMemberInfo(ctx context.Context, groupID string, u
 	d.mRWMutex.RLock()
 	defer d.mRWMutex.RUnlock()
 	var groupMemberList []*model_struct.LocalGroupMember
-	err := d.conn.WithContext(ctx).Where("group_id = ? And user_id IN ? ", groupID, userIDList).Find(&groupMemberList).Error
+	err := d.conn.WithContext(ctx).Where("group_id = ? AND user_id IN ? ", groupID, userIDList).Find(&groupMemberList).Error
 	return groupMemberList, errs.WrapMsg(err, "GetGroupMemberListByGroupID failed ")
 }
 
diff --git a/pkg/db/model_struct/data_model_struct.go b/pkg/db/model_struct/data_model_struct.go
index 612cab786..7bae3b6d6 100644
--- a/pkg/db/model_struct/data_model_struct.go
+++ b/pkg/db/model_struct/data_model_struct.go
@@ -399,7 +399,8 @@ func (LocalVersionSync) TableName() string {
 }
 
 type LocalAppSDKVersion struct {
-	Version string `gorm:"column:version;type:varchar(255);primary_key" json:"version"`
+	Version   string `gorm:"column:version;type:varchar(255);primary_key" json:"version"`
+	Installed bool   `gorm:"column:installed" json:"installed"` // Mark whether it has already been loaded
 }
 
 func (LocalAppSDKVersion) TableName() string {
diff --git a/test/long_conn_test.go b/test/long_conn_test.go
new file mode 100644
index 000000000..8ad191920
--- /dev/null
+++ b/test/long_conn_test.go
@@ -0,0 +1,20 @@
+package test
+
+import (
+	"github.com/openimsdk/openim-sdk-core/v3/open_im_sdk"
+	"testing"
+	"time"
+)
+
+func Test_SubscribeUsersStatus(t *testing.T) {
+	time.Sleep(time.Second)
+	message, err := open_im_sdk.UserForSDK.LongConnMgr().SubscribeUsersStatus(ctx, []string{"5975996883"})
+	if err != nil {
+		t.Error(err)
+	}
+	t.Log(message)
+	ch := make(chan struct{})
+	select {
+	case <-ch:
+	}
+}