Among them, public green space includes block and strip public green space such as residential park, small garden and group green space. Even the bottom scattered, massive and banded public green space should have a width of not less than 8m and an area of not less than 400m2. The green area within the land area should not be less than 70% of the total area (including the water surface), and at least13 of the green area can receive direct sunlight all the year round, and some leisure and entertainment facilities should be added. In the design and calculation, the area of green courtyard land such as green space beside residence also requires that the land within the range of building exterior wall 1.5m and road sideline 1m should not be included in the green land. "