Generally, it is 5%- 10% for multiple floors,113%-17% for small and high floors, and 20%-23% for high floors and above. Future community is the first batch of modern grass-roots units in Zhejiang Province. According to the inquiry of Zhejiang Housing Management Bureau, the pool area of the community is 5%- 10%, and the pool area of small and high-rise buildings is11-17.