There is an app in China that helps Chinese Apple users download the APP. 
This flash app actually has 300 million Apple users, indicating that 300 million iPhone users in China do not have an Apple ID, and they don't know how to register an Apple ID and can only use the flash APP to use the iPhone. 

Many Chinese people don't even have an email address. 

They don't know how to register an Apple ID. Those 300 million iPhones are all low-ed-educated groups.

They don't understand that the iPhone has its own iCloud mailbox to register an Apple ID.