Due to legal requirements in some regions, minors must have a parent's or legal guardian's permission to use WeChat. After successfully registering, this account will be prompted to set up Guardian Mode, including a payment card verification to ensure minors are using the account with a parent's or legal guardian's permission. If verification is not completed within 30 days of registration, the account will be permanently restricted, and you'll need to create a new account to continue using WeChat.
For more information on payment card verification, visit link.