China has been continuously introducing tightening housing policies; other than the policy of directional interest rate increase to raise the mortgage interest rate, there are also a number of administrative restriction policies. Recently, Changsha, Chongqing, Nanchang, Nanning and other seven cities announced restriction in property sales, with some even "freeze" the housing market. The duration of the policies varies from 2 to 8 years depending on the region. Until now, the layout of the policies gradually becomes clearer, which is to maintain the stability of the market until the announcement of the property tax.