What should I do if the SMS number receiving the verification code is empty?

It may be because your mobile phone number is connected to the internet, so you can't receive the verification message normally. That is, your mobile phone number was originally connected to China Unicom, and it became a telecom or mobile card after the number was transferred to the network. This will happen to you. Solution: Get a new card or return it to the original operator. One is intercepted by security software. Second, it may be related to the website that publishes the verification code. Third, some telecom operators may not support it.