If you are a self-employed, you can apply for a credit card of China Merchants Bank by providing your individual business license and tax bill for the last three months, and you can also provide your other financial certificates: income tax withholding certificate; Copy of self-owned real estate license; Copy of self-owned car driving license; Bank certificates of deposit and other information that can prove your economic level.
If you can't apply for the main card directly without a business license, you can see if there are any immediate family members who can apply for the main card and handle the secondary card for you.