diff --git a/internal/rpc/group/group.go b/internal/rpc/group/group.go
index 2175aee04..d345a4c03 100644
--- a/internal/rpc/group/group.go
+++ b/internal/rpc/group/group.go
@@ -165,25 +165,14 @@ func (s *groupServer) CreateGroup(ctx context.Context, req *pbGroup.CreateGroupR
 	if req.OwnerUserID == "" {
 		return nil, constant.ErrArgs.Wrap("no group owner")
 	}
-	var userIDs []string
-	for _, userID := range req.InitMembers {
-		userIDs = append(userIDs, userID)
-	}
-	for _, userID := range req.AdminUserIDs {
-		userIDs = append(userIDs, userID)
-	}
-	userIDs = append(userIDs, req.OwnerUserID)
-	if utils.IsDuplicateID(userIDs) {
+	userIDs := append(append(req.InitMembers, req.AdminUserIDs...), req.OwnerUserID)
+	if utils.Duplicate(userIDs) {
 		return nil, constant.ErrArgs.Wrap("group member repeated")
 	}
-	users, err := getUsersInfo(ctx, userIDs)
+	userMap, err := getUserMap(ctx, userIDs)
 	if err != nil {
 		return nil, err
 	}
-	userMap := make(map[string]*open_im_sdk.UserInfo)
-	for i, user := range users {
-		userMap[user.UserID] = users[i]
-	}
 	for _, userID := range userIDs {
 		if userMap[userID] == nil {
 			return nil, constant.ErrUserIDNotFound.Wrap(userID)
@@ -254,10 +243,9 @@ func (s *groupServer) GetJoinedGroupList(ctx context.Context, req *pbGroup.GetJo
 	if len(groups) == 0 {
 		return resp, nil
 	}
-	var groupIDs []string
-	for _, group := range groups {
-		groupIDs = append(groupIDs, group.GroupID)
-	}
+	groupIDs := utils.Slice(groups, func(e *relation2.GroupModel) string {
+		return e.GroupID
+	})
 	groupMemberNum, err := s.GroupInterface.GetGroupMemberNum(ctx, groupIDs)
 	if err != nil {
 		return nil, err
diff --git a/pkg/common/db/table/relation/group.go b/pkg/common/db/table/relation/group.go
index 70c2d3681..1306eded4 100644
--- a/pkg/common/db/table/relation/group.go
+++ b/pkg/common/db/table/relation/group.go
@@ -12,7 +12,7 @@ type GroupModel struct {
 	Notification           string    `gorm:"column:notification;size:255" json:"notification"`
 	Introduction           string    `gorm:"column:introduction;size:255" json:"introduction"`
 	FaceURL                string    `gorm:"column:face_url;size:255" json:"faceURL"`
-	CreateTime             time.Time `gorm:"column:create_time;index:create_time"`
+	CreateTime             time.Time `gorm:"column:create_time;index:create_time;autoCreateTime"`
 	Ex                     string    `gorm:"column:ex" json:"ex;size:1024" json:"ex"`
 	Status                 int32     `gorm:"column:status"`
 	CreatorUserID          string    `gorm:"column:creator_user_id;size:64"`
diff --git a/pkg/utils/utils_v2.go b/pkg/utils/utils_v2.go
index cabf9067e..94bd15cd9 100644
--- a/pkg/utils/utils_v2.go
+++ b/pkg/utils/utils_v2.go
@@ -144,6 +144,14 @@ func SliceSetAny[E any, K comparable](es []E, fn func(e E) K) map[K]struct{} {
 	})
 }
 
+func Slice[E any, T any](es []E, fn func(e E) T) []T {
+	v := make([]T, len(es))
+	for i := 0; i < len(es); i++ {
+		v = append(v, fn(es[i]))
+	}
+	return v
+}
+
 // SliceSet slice to map[E]struct{}
 func SliceSet[E comparable](es []E) map[E]struct{} {
 	return SliceSetAny(es, func(e E) E {