Legal analysis: the return of the fitness card should be carried out according to the relevant agreement in the contract signed between the gym and the members.

Legal basis: Article 509 of General Principles of Civil Law of People's Republic of China (PRC), the parties shall fully perform their obligations as agreed. The parties shall abide by the principle of good faith and fulfill the obligations of notification, assistance and confidentiality according to the nature, purpose and trading habits of the contract. During the performance of the contract, the parties shall avoid wasting resources, polluting the environment and destroying the ecology.