There is no credit card when going abroad, but a debit card with the UnionPay logo can be used, because many countries now have card readers and ATM machines that support UnionPay cards, so you can swipe your card and withdraw local currency with the correct withdrawal password. After the transaction is completed, UnionPay will deduct money from the debit card after converting it into RMB at the exchange rate of the day. UnionPay official website has a list of merchants/ATMs supporting UnionPay in various countries:.
-But it depends on the country you go to. The network coverage of UnionPay is not very dense. You will often meet non-UnionPay merchants or ATMs. It will be more convenient to have a dual-currency credit card.