It's not easy to handle. Bank credit cards are aimed at some customers with stable income, especially large state-owned banks such as workers, peasants, China Construction and China Post, which have better requirements for the identity of cardholders, and some employees such as civil servants, large state-owned enterprises and monopoly enterprises are more likely to apply. With all due respect, farmers are generally not the target customers of these big banks.
If you have a lot of assets in the post office, maybe you can. They won't do it for you, just close the account and transfer the deposit.