Legal analysis: illegal. It is illegal for educational institutions not to refund money. If both parties sign a contract, they can settle accounts according to the contract. Educational institutions stipulate in the contract that tuition fees cannot be refunded, which is the "overlord clause". If students don't attend classes and the school doesn't pay the corresponding teaching activities, they shouldn't get tuition.

Legal basis: Article 585 of the Civil Code of People's Republic of China (PRC), the parties may agree that one party shall pay a certain amount of liquidated damages to the other party in case of breach of contract, and may also agree on the calculation method of damages for breach of contract. If the agreed liquidated damages are lower than the losses caused, the people's court or arbitration institution may increase the liquidated damages at the request of the parties; If the agreed liquidated damages are excessively higher than the losses caused, the people's court or arbitration institution may appropriately reduce them at the request of the parties. If the parties concerned pay liquidated damages for delayed performance, the breaching party shall also perform the debt after paying the liquidated damages.