First, pay attention to whether the contract indicates that the card is transferable and the requirements. Individual gyms have requirements on the time and frequency of card transfer. Second, if you want to buy a card transferred to you by others, you need to pay attention to ask yourself the market value of this card, because individual sales consultants will sell this card at a low price. There is a lot of such information on the Internet. If your card is transferred to others, please pay attention to the disclaimer.