Online application (basically every CCB outlet can) is a traditional way to apply for a credit card. When applying, you should bring proof of work income (work permit, employment certificate, salary card (preferably more than 3 months), tax bill, social security bill, provident fund bill for the last 3 months, etc. Not all of them are needed, but you can. If you can attach some financial certificates, such as real estate, car output and the time limit of CCB. (In the case that proof of work income cannot be provided perfectly, it is best to have proof of financial resources. )
Online application, the procedure is relatively simple, and there is no need for additional diplomatic and economic proof. Banks will focus on the landlord's real estate, social security, provident fund, individual tax, personal credit and other information that can be queried online. If these efforts are not much or not much, this method is not recommended.