It is illegal to give up private courses. 1. Even if both parties sign a contract, it is illegal to agree not to drop out of class. 2. The contracts signed for private classes have strong personal attributes and are not enforceable contracts; 3. Even if the contract is marked with similar clauses such as "no card refund" and "once sold, the fee will not be refunded", the clause shall be deemed invalid.

Legal objectivity:

Article 24 of the Law on the Protection of Consumers' Rights and Interests: If the goods or services provided by the operators do not meet the quality requirements, consumers may return them according to the provisions of the state and the agreement of the parties concerned, or require the operators to fulfill the obligations of replacement and repair. If there is no state regulation and agreement between the parties, consumers can return the goods within seven days from the date of receipt; After seven days, consumers who meet the statutory conditions for terminating the contract can return the goods in time. If it does not meet the statutory conditions for terminating the contract, it may require the operator to fulfill the obligations of replacement and repair. Where goods are returned, replaced or repaired in accordance with the provisions of the preceding paragraph, the business operator shall bear the necessary expenses such as transportation.