Legal analysis: 1, the membership card has three functions at the same time: discount, stored value and integral. 2. Discount function: according to the discount information in the card, give corresponding discounts to the housing and catering. 3, stored value function: membership card can pre-store the amount in advance to facilitate consumption.

Legal basis: Law of People's Republic of China (PRC) on the Protection of Consumer Rights and Interests.

Article 16 When providing commodities or services to consumers, business operators shall perform their obligations in accordance with the provisions of this Law and other relevant laws and regulations. If there is an agreement between the operator and the consumer, they shall perform their obligations in accordance with the agreement, but the agreement between the two parties shall not violate the provisions of laws and regulations. When providing commodities or services to consumers, business operators shall abide by social morality, be honest and trustworthy, and protect the legitimate rights and interests of consumers; Unfair and unreasonable trading conditions shall not be set, and trading shall not be forced.

Article 17 Business operators shall listen to the opinions of consumers on the goods or services they provide and accept the supervision of consumers.