The services agreed between consumers and gyms are not special goods and services, and should follow the rule that "the operator shall bear the responsibility for replacement and return". Moreover, because personal fitness involves personal rights, according to the nature of this kind of contract, it is not an enforceable contract; Refund of fitness card is not an unbreakable "iron law", even if the agreement signed with the gym indicates similar clauses such as "no card refund" and "once sold, the fee will not be refunded", it should be considered invalid. Before accepting the service, the consumer can request to cancel the contract and the gym will refund the corresponding service fee.