Is there a difference between before closing the house and after taking the key?

There is a difference, and there is a big difference.

Sign the key first, indicating that you have closed the house and recognized the quality of the house. Then take the key first and then hand over all kinds of problems arising from the house inspection to the property maintenance. Of course, if it is a major problem that needs to be solved by the developer, it must be rectified by the developer. However, most of the problems of large and small buildings are kicked to the property office like a ball, and the owners only queue up in the property office to be solved. After all, your signature means that the developer got the last supervision payment, and the house payment is clear and has little to do with the developer.

And get the key before the house, the developer is eager to collect money, and the developer will actively solve the problems arising from the house inspection. Moreover, many things are unclear without first acceptance, after all, it involves possible damage and improper use in the decoration process. If the developer must take the key first and then repossess the house, he can take a flexible approach and indicate the words "I didn't see the house" or "I didn't inspect the house" in the repossession information, so that the problems arising from the house inspection can be handled flexibly.