diff --git a/internal/rpc/user/user.go b/internal/rpc/user/user.go
index 66bd1d682..f889214ad 100644
--- a/internal/rpc/user/user.go
+++ b/internal/rpc/user/user.go
@@ -598,6 +598,8 @@ func (s *userServer) UserRegister(ctx context.Context, req *pbuser.UserRegisterR
 			CreateTime:       now,
 			AppMangerLevel:   user.AppMangerLevel,
 			GlobalRecvMsgOpt: user.GlobalRecvMsgOpt,
+			FirstName:        user.FirstName,
+			LastName:         user.LastName,
 		})
 	}
 	if err := s.db.Create(ctx, users); err != nil {
diff --git a/pkg/common/convert/user.go b/pkg/common/convert/user.go
index 1130d81e2..a85e025d1 100644
--- a/pkg/common/convert/user.go
+++ b/pkg/common/convert/user.go
@@ -31,8 +31,10 @@ func UserDB2Pb(user *relationtb.User) *sdkws.UserInfo {
 		CreateTime:       user.CreateTime.UnixMilli(),
 		AppMangerLevel:   user.AppMangerLevel,
 		GlobalRecvMsgOpt: user.GlobalRecvMsgOpt,
-		Phone:             user.Phone,
-		PhoneVisibility:   user.PhoneVisibility,
+		FirstName:        user.FirstName,
+		LastName:         user.LastName,
+		Phone:            user.Phone,
+		PhoneVisibility:  user.PhoneVisibility,
 		CallAcceptSetting: user.CallAcceptSetting,
 		MsgReceiveSetting: user.MsgReceiveSetting,
 	}
@@ -51,6 +53,8 @@ func UserPb2DB(user *sdkws.UserInfo) *relationtb.User {
 		CreateTime:       time.UnixMilli(user.CreateTime),
 		AppMangerLevel:   user.AppMangerLevel,
 		GlobalRecvMsgOpt: user.GlobalRecvMsgOpt,
+		FirstName:        user.FirstName,
+		LastName:         user.LastName,
 	}
 }
 
@@ -63,6 +67,8 @@ func UserPb2DBMap(user *sdkws.UserInfo) map[string]any {
 		"nickname":            user.Nickname,
 		"face_url":            user.FaceURL,
 		"ex":                  user.Ex,
+		"first_name":          user.FirstName,
+		"last_name":           user.LastName,
 		"app_manager_level":   user.AppMangerLevel,
 		"global_recv_msg_opt": user.GlobalRecvMsgOpt,
 	}
@@ -106,6 +112,7 @@ func UserPb2DBMapEx(user *sdkws.UserInfoWithEx) map[string]any {
 	if user.MsgReceiveSetting != nil {
 		val["msg_receive_setting"] = user.MsgReceiveSetting.Value
 	}
+	// TODO: Add FirstName/LastName support to UserInfoWithEx proto when regenerated
 
 	return val
 }
diff --git a/pkg/common/storage/model/user.go b/pkg/common/storage/model/user.go
index 3903316e0..f1dcd6c99 100644
--- a/pkg/common/storage/model/user.go
+++ b/pkg/common/storage/model/user.go
@@ -50,6 +50,8 @@ type User struct {
 	AppMangerLevel   int32     `bson:"app_manger_level"`
 	GlobalRecvMsgOpt int32     `bson:"global_recv_msg_opt"`
 	CreateTime       time.Time `bson:"create_time"`
+	FirstName        string    `bson:"first_name"`
+	LastName         string    `bson:"last_name"`
 	// Phone 用户手机号（明文，仅服务端留存，下发时按 PhoneVisibility 过滤）
 	Phone string `bson:"phone"`
 	// PhoneVisibility 0=所有人可见 1=仅好友可见 2=隐藏
diff --git a/protocol b/protocol
index 90aae1d57..a186c4a07 160000
--- a/protocol
+++ b/protocol
@@ -1 +1 @@
-Subproject commit 90aae1d576466a1fa55eba386d1f7a38ca6062d0
+Subproject commit a186c4a0722d8ea983dacd34b6664f23e23dc18e