https://developers.weixin.qq.com/doc/oplatform/Mobile_App/Resource_Center_Homepage.html /MicroMsg.SDK.MMessageAct: sendUsingPendingIntent fail, ex = com.Qunar: Targeting S+ (version 31 and above) requires that one of FLAG_IMMUTABLE or FLAG_MUTABLE be specified when creating a PendingIntent.     Strongly consider using FLAG_IMMUTABLE, only use FLAG_MUTABLE if some functionality depends on the PendingIntent being mutable, e.g. if it needs to be used with inline replies or bubbles.