1, not all places can be swiped. You can look at the names of credit card issuers, such as MasterCard, VISA, JCB, etc. You need to swipe your card in a place with a answering POS machine, such as China UnionPay card. When going abroad, you must look for a POS machine with the UnionPay logo, unless the credit card is a dual-currency card.

2. Generally, consumption abroad is settled in US dollars. If you hold non-US dollar credit cards such as Japanese yen and euro, there will be a handling fee of three thousandths, and there will be a handling fee if you need enough US dollars to repay the loan when you return to China.