Shengyuan, Jin Dong, Qujing, can't do the real estate license.

1. First of all, within a certain period of time, buyers will not return the house, while developers will pay liquidated damages on a daily basis; Another is that buyers return a house, and developers pay a certain penalty.

2. If negotiation fails, you can entrust a lawyer to send a lawyer's letter to the developer. A lawyer's letter can play the role of reminding and warning the other party.

3. In the end, if the developer still refuses to solve the problem through negotiation and sending a letter, he can bring a lawsuit to the court, asking the developer to continue to perform the contract or demand the termination of the contract, and investigate the developer's liability for breach of contract.