Can credit cards starting with 37 be used in China?

The credit cards beginning with 1 and 37 are American Express. If the American Express card has only one logo, it can hardly be used in China.

2. American Express Card has the dual logos of American Express and UnionPay, so it can be used in China, and it is widely used. As long as there is a POS machine of UnionPay, it can be traded.

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