The reason why banks have zero credit cards is because of the bad debt rate and they don't want to miss potential good users. Most of them are aimed at newly graduated college students or credit card whites. So it's normal for you to apply for an unlimited card. For example, the League of Legends credit card issued by China Merchants Bank has a red cover and is a zero-quota credit card for college students. College students only need to provide academic certificates and identity certificates to apply.

Don't cancel your credit card immediately after you get it. As long as it is used properly, the bank will increase the credit card limit.

You can deposit cash in the credit card for more than 3 months, and the bank will increase the credit card. The amount of credit line depends on the cardholder's monthly deposit and consumption.