private static void OnNetworkQualityChangedNotifyCallback(string userId, int upQuality, int downQuality)
        {
#if UNITY_STANDALONE_WIN || UNITY_STANDALONE_OSX
            if ((IAliRtcEngine.OnNetworkQualityChangedNotify != null) && AliRtcEngineCallBackQueue.Current != null)
            {
                AliRtcEngineCallBackQueue.Current.EnQueue(() =>
                {
                    IAliRtcEngine.OnNetworkQualityChangedNotify(userId, upQuality, downQuality);
                });
            }
#else
            if ((instance.OnNetworkQualityChangedNotify != null) && AliRtcEngineCallBackQueue.Current != null)
            {
                AliRtcEngineCallBackQueue.Current.EnQueue(() =>
                {
                    instance.OnNetworkQualityChangedNotify(userId, upQuality, downQuality);
                });
            }
#endif
        }