In the year of 2007，a series of policies aimed to regulate leasing market were issued，which will help to active and develop the leasing market.It has recorded the booming demand of houses along with the Metro lines with the remarkable rent increase，which has definitely been the feature of the property market in 2007. However，the price gap（annual leasing income between sales price）has been enlarged in 2007，which has caught a lot of attentions from all parties.It will be the Olympics year in China in 2008. The favorable news will definitely stimulated the leasing demand in the market and a fast rent increase is predictable. As the macro control goes further deep，sales price of new property will slow down the increase speed. Comprehensively，with considering those opposite two trends，the price gap（annual leasing income between sales price）could be reduced.