In principle, if you apply for a credit card repeatedly at the same bank, you need to wait for more than three months. And generally speaking, there are three types of reasons for credit card rejection:

The first type of reason is the applicant’s basic information, such as under 18 years old, occupation that is prohibited for bank credit cards, insufficient information provided, and salary slips. The information is not detailed and so on.

The second type of reason is the applicant’s credit situation, such as the applicant applying repeatedly, having an unstable job, having a bad credit record, and the applicant cannot be contacted, etc.

The third category is other reasons, such as the contact person not knowing or unwilling to be the contact person, the applicant's health reasons, the contact person not meeting the requirements, etc.

You'd better confirm the real reason why your first application failed, and pay more attention when applying for the second time to prevent being rejected again.