Yes, you can specify a credit card or account for transactions.

1. Go to the Menu and select "Settings" > "Payment Settings" > "Default Payment Method" > Choose your pre-selected payment card or account.
2. In "Scan to Pay" payment mode, the system will show your pre-selected payment method first. You can click on "Credit Card" or "Smart Account" or "Payment Account" and change to another credit card or account for payment.
3. In "QR Code Payment" mode, system will show your pre-selected payment method first. You can click on " Credit Card" or "Smart Account" or "Payment Account" and change to another the credit card or account for payment.