Yes, as long as the overseas shopping website supports UnionPay payment, it can be used. Moreover, transactions in foreign currencies are directly converted into RMB, free of charge. Before you shop overseas, check the card organizations supported by the website. If there is a UnionPay logo, then it is OK. If not, you can apply for a CCB dual-logo Global Payment Dragon credit card, which will have a wider range of uses and free foreign currency transactions.