China Construction Bank has several JCB credit cards. There are UnionPay and JCB dual currency ones, and there are JCB single currency ones.
If it is a JCB single logo, CCB’s website says that “JCB brand Japanese travel cards can be used at overseas JCB merchants and JCB machines, but are not supported for use on domestic JCB networks and UnionPay networks.” Therefore, it is not convenient to use within the country. .
If you have UnionPay JCB dual logo, then it is a RMB-USD dual-currency credit card. If you use UnionPay's POS consumption, it will be recorded in RMB. If it is settled in other foreign currencies, it will be recorded in US dollars.
You can log in to the CCB credit card website and click on credit card application. There are many introductions to the card types. You can take a look.