Does the subject want to ask, "There are two Guangfa credit cards with the same amount. If you use a credit card to pay for 500 yuan, that credit card will also reduce 500 yuan. There are two Guangfa credit cards with the same amount. If you spend 500 on a credit card, that credit card will not be reduced by 500. The amount of each credit card is independent, and the amount of one credit card will not affect the amount of another credit card. There are two Guangfa credit cards with the same amount. Using the limit of one credit card will only reduce the available limit of this credit card and will not affect the limit of another credit card.