Push notifications China

Hi. I help work on OneSignal and I happened to see this message here. Technically you can use OneSignal for this. OneSignal supports importing tokens via API, and then delivering notifications to them through OneSignal's API or dashboard. You will first have to make sure you can export your existing push tokens from Firebase. Note that many OneSignal features (such as tracking your notification click rate) won't work until you add the OneSignal library to your app and users update to the new version, but at least you can send them notifications. You can contact OneSignal support and reference this message for assistance if you're not sure where to start.

You can also use the APNS APIs directly for this, but it might be a little more complex. Apple's APNS APIs are documented here https://developer.apple.com/library/archive/documentation/NetworkingInternet/Conceptual/RemoteNotificationsPG/APNSOverview.html#//apple_ref/doc/uid/TP40008194-CH8-SW1

In China, Google products, including Firebase Cloud Messaging (FCM), face accessibility issues. For your camera app, one possible solution is to use a service like 21YunBox. Their acceleration suite facilitates connection to Google Firebase, which could help bypass the limitations you're facing with FCM in China. This approach aligns with China's firewall and data privacy regulations and offers enhanced push notification personalization. Just be aware that whatever solution you go with will require specific attention to China compliance.

If you want to learn more, you can reference this article: https://www.21cloudbox.com/accessing-chinas-mobile-app-market-overcoming-the-fcm-firewall.html

Consider the China compliance, it's better to leverage China local Push Service provider, like Ali Cloud's Mobile Platform as a Service or Tencent Push Notification Service (TPNS).