This is illegal. I am a real estate salesman. Now I'm in Shijiazhuang, no matter where I am, I have to pay deed tax and public maintenance fund when the house comes down. After paying this money, the Housing Authority will give the key. Your mortgage has not come down yet. This house is not yours yet. Did you get the blue (or green) contract? It should have the seal of Keene, the developer of the Housing Authority. If there is, so much the better. If you don't, then. . . It is not recommended to pay this money.