Do you know whether the second-hand houses in Chongqing are calculated by surface or by interior?

Second-hand houses in Chongqing are calculated according to the construction area, and new houses are calculated according to the interior area. If the money is not enough, but there is a place to live at present, it is recommended to buy an auction house with a first-hand house; Buying a second-hand house that others have lived in for a long time will not be much cheaper, and my heart will definitely be uncomfortable. If you don't have enough money, but you are in a hurry to move in, it is recommended to buy a second-hand clean house or a second-hand house with hardcover that the developer has not yet moved in. For example, in Asia-Pacific Business Valley, a down payment of about 6W is enough (one room and one living room). At present, the deed tax for buying a second-hand house is 3 points, which is 1.5 points if you are the first suite or rural hukou. The key is to choose a suitable community with convenient work and the best life.