Can you use credit cards to add fuel ?

Yes, you can

Sure, go to the counter and tell them which fuel pump number and how much money's worth of fuel you want to buy, then swipe your card. Once the payment is successful, just take the corresponding fuel pump to refuel.

Sure, first go for authorization, then go get the gun and refuel, and finally check out.

Domestic credit cards are mostly not very useful. Go to the supermarket staff directly with cash and tell them which gun it is. The staff will operate it manually.

Can, but need to pay first. You can go in and say you are visiting, and prepay 20USD. Refund more and supplement less. Can't directly use on pump because need to input zip code.

ICBC credit card failed to refuel twice, and the first failure also deducted one dollar, which is said to be pre-authorized and will be refunded.

The fuel dispenser also has different cards. My ICBC card works, but the CMB card doesn't. There was also a time when the money wasn't deducted