What is the failure to send the verification information of WeChat friends?

The "sending failure" of WeChat friend verification prompt may be caused by the following three reasons:

1. Add the friends to be added to the WeChat blacklist. When WeChat sends a friend verification, it will prompt "Sending Failed" and cannot be added successfully;

2. It may be caused by the current network instability. It is suggested that the mobile phone be turned off for 5- 10 minutes, and try to add it in a better location.

3. Because your Friend Request has expired, the validity period of WeChat plus Friend Request is 10 days. Unable to pass the verification after expiration, your friend needs to resend the friend application.