Why does Alipay registration currently only support mainland mobile phones? If it is a non-mainland mobile phone, the verification code cannot be accepted?

The possible reasons why the Alipay mobile phone can receive text messages but cannot receive the verification code are: 1. Caused by network communication abnormality, it is recommended to try at another time period; 2. Is there any downtime and arrears; 3. Is it Turn on blocking system text messages, or install software to intercept text messages. It is recommended to change the mobile phone card to another mobile phone and try; 4. If the quick payment operation has been modified in Alipay, but it is still sent to the original mobile phone, please ask your bank to modify the bank reservation mobile phone number; 5. Currently only mainland mobile phones are supported. If it is a non-mainland mobile phone, the verification code cannot be accepted