If you buy a new house with the developer, you will receive a lawyer's letter from the developer before handing over the house, telling you that you can get the key to the new house with the developer after paying off part of the final payment, even if you get the key, you have to hand over the house. After delivery, you can check whether there are any defects in the house, and the developer is responsible for maintenance. The warranty period of the new house is 1 year.
If you buy a second-hand house, the delivery time is negotiated by the buyer and the seller in advance, and the buyer and the seller conduct it through a lawyer. The buyer pays the final payment on the pre-agreed date, the seller gives the key to the buyer, and the lawyer gives the transfer document to the buyer, which is regarded as completion of delivery. The sale of second-hand houses follows the principle of what you see is what you get. /zd/ym