"Signature" consumption mode: After spending by credit card, the cardholder signs the POS purchase slip to confirm the transaction.
"Password+signature" consumption mode: When using a credit card to swipe a card at UnionPay POS, POS will ask the cardholder to enter the transaction password to verify the cardholder's identity, and after the transaction is successful, the cardholder needs to sign a purchase order at POS to confirm the transaction.