China failed to send verification code for human organ donation.

It is very common that the sending of SMS verification code fails due to the user's own reasons. For example:

1. User's mobile phone is blocked by the operator. At this time, the user can call the operator to cancel.

2. When the user's mobile phone is in the blind area of signal coverage, such as basement, deep mountain, etc. , or when the user's mobile phone is in a network signal shielding area, such as Tibet and other areas, it may be impossible to receive the SMS verification code.

3. The user's mobile phone is in arrears, turned off or stopped.