If you are a UnionPay single-currency credit card, you can spend money in Mexico with a UnionPay pos machine, but you can't spend money without it. If you are a dual-currency credit card of UnionPay and visa/ MasterCard, in Mexico, in addition to UnionPay's pos, you can also spend it through vsia/ MasterCard's pos machine. In fact, there are many pos machines that can use UnionPay in the world now. Even if there are no pos machines in this country, there will definitely be visa and MasterCard POS machines. You can rest assured of that.

In addition, it should be reminded that if it is an ordinary dual-currency credit card, you should contact CCB to purchase foreign exchange for repayment on the same day after returning home.