Hello! Open the sidebar in the play Store and click Account-Payment Method-More Payment Settings. Open "Payment Center", click menu-Settings on the left, click the edit symbol next to the country/region, and select Create New Payment Data. If you want to pay in dollars, choose a country with dollars as the main currency, such as the United States, and then fill in the billing address and save it. After saving, click the menu and select the payment method-add credit card/bank card. At this time, if you buy from the play store again, the payment currency will become US dollars. If you want to change it to GBP /HKD next time, or go to the payment center, switch to the corresponding area in the payment information in the menu.