Because the house has to pay taxes, people who own multiple properties will put the extra houses on the market for sale, and those who want to invest in real estate speculation will not speculate again. There will be a large number of houses in the market. If the supply exceeds the demand, the house price will fall. For those who just need to buy a house, the cost of buying a house is reduced. Property tax can play a role in regulating the real estate market and make house prices return rationally.