Recent year, though the price of houses is increasing, it is still in the range that most people can pay. Sudden huge profit does not appear in the estate development. There is no visible increase on purchasing or building house according to the family income. For the lack of public product, the spending on education and medical care is rising rapidly. People have developed ability of uncertain expectation, and their ability of purchasing hous- es is going down. More and more people dare not purchasing houses, and then it seems that the price of houses is much higher to them. In a word, the lack of product is the main reason for the higher prise of housing.