Legal analysis: First, if the enrollment advertisement or service contract stipulates "invalid refund", consumers advocate that full refund should be implemented in accordance with this agreement. Second, if the service contract is not fulfilled and the consumer proposes to terminate the contract, the educational institution shall refund part of the service fee in accordance with the principle of fairness. Third, consumers' actual acceptance of educational services cannot prove that there is a price difference between the services they receive and the services agreed in the contract, and the request for refund of service fees cannot be supported. Fourth, if consumers and educational institutions have objections to the content, quantity and price of educational services, they should accept the claims proved by evidence and judge whether there are reasons for refund.

Legal basis: Civil Code of People's Republic of China (PRC).

Article 505 The validity of a contract concluded by the parties beyond the scope of business shall be determined in accordance with Section 3 of Chapter VI of Part I of this Law and the relevant provisions of this Chapter, and the contract shall not be deemed invalid because it exceeds the scope of business.

Article 506 The following exemption clauses in the contract are invalid: (1) Causing personal injury to the other party; (2) Causing property losses to the other party due to intentional or gross negligence.