Polish banks can use mobile banking to transfer money to banks in China. China Bank's card can accept small foreign exchange remittance, but when you take it, the bank will change it into RMB. Mbank in Poland has not signed a contract with a domestic bank, and the remittance has to go through a third-party bank, which is relatively slow. It takes at least two weeks, that is, half a month, sometimes longer, but not more than a month.