In terms of transaction network selection, it is recommended to trade through UnionPay network, and the traded pounds will be converted into RMB, with no currency conversion fee. After you come back, you can directly repay RMB according to the bill.

if you choose to trade through the foreign card network (that is, through VISA, MasterCard and JCB network)

If the card level is above the standard platinum level, the traded pound will also be automatically converted into RMB, and there is no currency conversion fee

Conversely, if the card level is ordinary card or gold card (except single identification card), the traded pound will be converted into USD/EUR at the exchange rate first (depending on the foreign currency account of the credit card) When paying back the money, the landlord can choose to pay RMB into the credit card on the same day and call his home to purchase foreign exchange for repayment.

To sum up, the landlord can basically repay RMB after returning to China, and there is no need to repay GBP

If the landlord has other questions, you can ask them.