The project is located in Fenghua District, Ningbo City, and adopts a steel pipe three-dimensional truss structure system. It mainly consists of 34 radial cantilever main trusses in the east-west direction and 7 circumferential secondary trusses forming a spatial truss. The span and height of the main truss are arranged according to the building shape, with a maximum cantilever span of more than 20 meters. The main truss is hinged with concrete, and the truss nodes are welded with steel pipes intersecting. The long axis length in the north-south direction is nearly 210 meters, the short axis length in the east-west direction is nearly 190 meters, and the highest point elevation exceeds 29 meters. The front and rear double support nodes have a complex structural shape.