At that time, the credit card limit that I just applied for was only five cards in 500 yuan, which was a commemorative edition of the Guangzhou Asian Games. This is very similar to your situation. Later, I changed the application certificate to prove my financial assets bill (provided by GF Securities)+education certificate+social security certificate (social security number)+personal income tax certificate (if you pay taxes, it will be sent to you, otherwise you can print it in local tax), and then I applied. Don't write too high a limit without a deposit certificate and real estate, otherwise it will be deducted directly.
Netizens say that ICBC's credit card is difficult because ICBC's audit is very strict. One is not to recognize the card, and the other is not to recognize the salary certificate. All certificates must be compulsory. As for China Merchants Bank, it used to be very simple, but now I hear it is also very strict. You can try other local banks.