operators are not allowed to make unfair and unreasonable provisions to consumers, such as excluding or restricting consumers' rights, reducing or exempting operators' responsibilities, and aggravating consumers' responsibilities, by means of format clauses, notices, statements, shop notices, etc., and are not allowed to use format clauses and technical means to force transactions. Format clauses, notices, statements, shop notices, etc. contain the contents listed in the preceding paragraph, and their contents are invalid.

So

it is illegal to stipulate the minimum consumption in restaurants.

Unilateral formulation of such terms

harms the legitimate interests of consumers.

It restricts consumers' right to choose independently.

Besides such overlord clauses as "minimum consumption"

There are also "no bringing drinks"

No bringing drinks ".

article 9 of the consumer protection law

consumers have the right to choose their own goods or services. Consumers have the right to choose their own operators to provide goods or services, choose their own varieties of goods or services, and decide whether to buy or not to buy any kind of goods or accept or not to accept any kind of services. Consumers have the right to compare, identify and select when they choose their own goods or services.

in case of disputes between consumers and business operators, they can be resolved through the following channels:

(1) settlement through consultation with business operators;

(2) requesting consumers' associations or other mediation organizations established according to law to mediate;

(3) complain to the relevant administrative department;

(4) submit it to an arbitration institution for arbitration according to the arbitration agreement reached with the operator;

(5) bring a lawsuit to the people's court.