Legal analysis: only ID card, mobile phone number, bank card and photos are needed to apply for a fitness card. Because of the different fitness institutions, the relative requirements for accreditation are different, but most regular fitness institutions need these documents. Fitness cards handled by fitness institutions are all from real-name registration system, and ID cards and photos are inevitable. The mobile phone number is for the convenience of contact, not to mention the bank card.

Legal basis: People's Republic of China (PRC) Identity Card Law.

Thirteenth citizens engaged in related activities, need to prove their identity, have the right to use the identity card to prove their identity, the relevant units and their staff shall not refuse. The relevant units and their staff members shall keep confidential the personal information of citizens recorded in the resident identity cards obtained in the course of performing their duties or providing services.

Fourteenth in any of the following circumstances, citizens should show their identity cards to prove their identity:

(a) the registered items of permanent residence have changed;

(2) military service registration;

(3) Marriage registration and adoption registration;

(4) Going through exit formalities;

(5) Other circumstances in which it is necessary to prove identity with a resident ID card as stipulated by laws and administrative regulations.

A citizen who has not obtained a resident identity card in accordance with the provisions of this Law may, when engaging in the relevant activities specified in the preceding paragraph, use other means of proof that meet the requirements of the state to prove his identity.