At present, domestic credit card issuance is basically based on the set card model (UnionPay foreign currency).
With the credit card package, you can enjoy unlimited quotas. Foreign currencies are basically in US dollar accounts, and the RMB limit is automatically converted into the US dollar limit according to the foreign exchange rate.
There are basically no channels and conditions for using foreign currency credit cards in China, but it is recommended to activate them because basic foreign currency credit cards will state that annual fees are waived during the validity period of the card (foreign credit card organizations in China directly seize user resources. No annual fee).