Huahui Engineering Design and Technological Innovation Center is one of the few three-star green building of office and commercial type in Zhejiang Province.The site of the project is compact with the ground green rate is only 10%. However, through roof gardens, roof farms, vertical greenery and other methods, about 4,500m² of greening has been added. Vertical greenery is distributed on each floor of the building, turning a 100-meter high-rise building into a vertical forest. It has innovated the ecological environment of high-rise offices and reduced the distance between people and nature .