Calculated at 6‰. Credit card swiping machines in commercial banks are all calculated according to 6‰, which is uniformly stipulated by the People's Bank of China. In actual settlement, it may be above 5‰. The full name of POS is point-of-sale information management system, which means "point-of-sale" in Chinese. It is a terminal reader equipped with bar code or OCR code technology, which has the cash register function of cash or barter bank.