Due to the diversification of investment subjects in greening construction, it is difficult for the competent government departments to master some greening projects, such as greening in residential quarters. On the one hand, in order to meet the requirements of the planning department for 30% green space rate, on the other hand, in order to meet the fashionable requirements of people's "living green" nowadays, and improve their housing prices, developers must greening, and at the same time, save funds, From the perspective of cost reduction, please