It's not dangerous. CCB credit cards are generally used in official website. When I finally submit my application, I need to use my mobile phone to get a dynamic verification code for identity verification. You should apply online under the guidance of the staff. Then tell the staff the verification code. He also helps you to enter your authentication identity in official website, which does not involve payment. And you know the purpose of this card yourself, so it's not dangerous. Of course, if it is a verification code for payment, you can't tell others, even your mother, if you are killed.