Legal analysis: you can return a house if the bank loan is not approved, but it depends on what the reason is: if it is caused by the developer or the bank, you can get a full refund, and the developer will compensate you for the bank interest in the same period; If you can't get a loan for personal reasons, the developer has the right to charge a certain amount of liquidated damages according to the agreement in the purchase contract. Please refer to the agreement in your house purchase contract for details.

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 according to the breach of contract, or agree on the calculation method of the amount 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 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.