There is only one pronunciation of "brush" in Cantonese, and there is another pronunciation of "sha" in various Cantonese dictionaries, but it is not commonly used.

"Ka" is the English transliteration of "Card", which is translated into "Card" in Hong Kong and "Card" in the Mainland.

"Lu Card" was first spoken in Hong Kong, and was later imitated and popular in Cantonese.

Cantonese says "Luca Card/Card" and Mandarin says "swipe your card".

In fact, there is also a saying of "swiping a card" in Hong Kong and Guangdong, which means putting a magnetic card into or close to a magnetic card machine, so that the magnetic head can read it and identify the information in the magnetic card, so as to confirm the identity of the cardholder or increase or decrease the amount of money stored in the magnetic card. Because some magnetic cards need to be moved on the magnetic card machine, which is similar to the action of a brush, it is called swiping. Although this can also be used to talk about bank card consumption, it is more used to describe the situation of swiping IC cards and Octopus.

when using a bank card to spend money, it is more likely to say "Lu Card"

ps: In the past, when there was no pos terminal, the card was manually pressed, which required manual authorization from the card-issuing bank. The transaction could not be automatically debited, and the transaction payment could only be received after checking with the bank. (It seems to have appeared in old Hong Kong movies. First, the bank card was placed on a square machine platform, and then a square board on the machine slid from side to side and swept the bank card. That slippery action is "Lu" in Hong Kong dialect)

pss, the details about manual card pressing-there is almost no place to manually press cards now.

Manual card pressing is usually used without POS machines or internet access. The pressing operation must have a pressure-sensitive duplicate "direct purchase order" (at least two copies) and a telephone. Check before pressing the bill (the judgment is to see whether the information on the card is valid first, and then look through the blacklist of bank card numbers that are thicker than the yellow pages provided by the bank regularly to see if they are on the list. If you still feel uneasy, the cashier will call the acquiring bank for authorization, and then look at the ID card or something. Then, the operator prints the card number, name, etc. raised on the credit card on the purchase order with the credit card pressing device, and writes the information such as the amount and date, then calls the authorization hotline of the acquiring bank, reports the card information to apply for authorization, and writes the obtained authorization code on the purchase order, and then the cardholder signs it after confirming that it is correct. After checking the signature, the operator gives the cardholder a copy of the credit card and the purchase order. At this point, the manual pressing procedure is completed. Authorized calls are usually dialed immediately. In some areas with poor communication or good credit discipline, merchants will encounter the situation that they will deliver the goods to complete the transaction after signing the card. Authorization will be completed in the future, but merchants are at risk of credit card fraud (if customers use invalid cards to pay, they will not be able to find out immediately without applying for an authorization code immediately).

now, the luka card is swiped by POS terminal and settled by unionpay network. after the account is rolled on the machine at the end of business every day, the account clearing center of the acquiring bank will do batch processing after receiving the data and transfer the transaction money to the account designated by the merchant the next day.