How to authenticate paypal?

Login account-click the fund tab-click the associated bank account-click OK-enter information-enter verification code-authentication succeeded.

The specific steps are as follows:

Sign in to your PayPal account.

Click the Funds tab, and then click the associated bank account.

Enter the details of UnionPay card and click Add Card.

Click Confirm Now, and the UnionPay website will open in a new window.

Enter relevant information as required, and authorize China UnionPay to send verification code via SMS.

Enter the verification code on the same page, click OK, and the verification is successful.