The difference between Android international version mobile phones and national bank mobile phones

The overseas version of Android uses Google's GMS service, and then the app store has Google's Google Play built-in, and uses Google's unified push service GCM.
Therefore, the overseas version of Android is relatively consistent in terms of push services. We do not need to launch the APP on our mobile phones to receive push messages. We use Google's GMS and Googleplay, so the quality of Android apps is relatively high, and there are fewer rogue apps. It's much better to wake each other up, launch quietly in the background, and steal permissions. Most of the domestic versions of Android
are modified according to AOSP. They do not use Google's GMS and do not have Google Play. Major mobile phone manufacturers build their own stores for use. As for push services, some APP manufacturers do it themselves, some rely on third parties, and there is no Consistent.
This has resulted in the domestic system being significantly changed compared to native Android. Many people even call their modified version of the system a new system, even naming it OS.