Why can some Android WeChat rental numbers be uploaded directly without playing with their faces?

Because the other person is an adult, face recognition appears to protect minors.

If the user of Android WeChat rental number is a minor, and others use your number in different places, face recognition will pop up to protect minors. The rental number can assist the renter in face recognition, and the helper can click on the SMS link for verification.

Face recognition pops up when renting a number, just to see if it is registered with your own name. If you are not, you can return him to the company.