What does buying a card mean?

Buying a card password means that if you want to recharge, you need the card number and card password to recharge, and this is something you need to buy to have.

Card secret refers to the physical card or virtual card secret of the card purchased through the dealer and the password on the card. For example, playing games to buy some cards to recharge, you need to have card cheats. Generally, you can buy a physical card or use a virtual card. The card density of a physical card needs to be scraped off to expose a silver film; The secret of virtual card can be obtained directly through online purchase.