Why can't I select the Chinese region when I register an account on the App?

The App classifies the countries/regions into: Globally, Outside the Chinese mainland, and In the Chinese mainland.

OEM App:

• If you selected Outside the Chinese mainland when you created the OEM App, you cannot select the Chinese mainland during registration.

All-in-one App:

• If your App is available only in countries and regions outside the Chinese mainland (which can be downloaded from an App market outside the Chinese mainland), you cannot select the Chinese mainland during registration.
• To register an account in the Chinese mainland, download the App from an App market in the Chinese mainland with a mobile number that starts with +86 in the Chinese mainland.

If you use a global App, but your mobile number is not supported in the Chinese mainland, that is, not started with +86, or the local region of the iOS device is not the Chinese mainland, you cannot select the Chinese mainland during registration.