To apply for a credit card, the first requirements are age and financial stability. Applicants must be between 18 and 60 years old and have a stable job and source of income. The following are the specific application steps and required materials:

Domestic residents need to prepare the following documents: a completed application form, identification documents such as ID card, proof of residence, and income certificate proving stable income. Foreigners and people from Hong Kong, Macao and Taiwan are also required to provide a foreigner residence permit (employment type) or relevant employment certificate. If you are a private owner who starts your own business, you must also provide a copy of the industrial and commercial business license, which must indicate the applicant's name, company name and date of operation.

As for the credit card limit, each bank and card level are different. Generally, the overdraft limit for regular cards and gold cards is 50,000 yuan. After reaching this limit, if you want to increase the limit, you may need to apply for a higher-level platinum card. The limit is usually between 100,000 and 1 million. The overdraft limit is the consumption limit given by the bank. If you exceed the limit, you may need to pay additional fees.

The overdraft function of a credit card allows cardholders to repay in installments after consumption within a certain period. However, it should be noted that the overdraft period is up to 60 days. Overdraft will accrue interest at a daily interest rate of 0.5% to Fifteen calculations, specifically determined based on the number of overdue days and overdraft amount. Overdraft interest calculation is not divided into segments, and is calculated based on the highest interest rate bracket for the maximum overdraft amount.

After understanding the above conditions and regulations, applicants can prepare materials according to their own circumstances and apply for a suitable credit card from the bank. Remember to make timely repayments to avoid additional fees. More information can be found on Baidu Encyclopedia of Credit Cards.