The diameter of the large roof is about 160m, and the small roof is a circular flat roof supported on a 30m diameter inner ring of the large roof. The outer diameter is 42m, forming a saddle shaped outer ring with an irregular spatial curved surface. The 28 floor standing V-shaped columns arranged in the circumferential direction of the outer ring and the 28 inclined columns supported on the large roof (uniformly arranged along an ellipse with a diameter of 119.76-128.22m) jointly support the roof. The outer V-shaped column is a round steel pipe column with a diameter of 610mm and a length of 22m~31.5m; The inner inclined column is a round steel pipe column with a diameter of 299mm and a maximum length of no more than 6m. The maximum span of the large roof inside the inner inclined column is 128.22m, and the maximum horizontal length of a single truss of the large roof is about 49m, with a weight of about 35 tons. The height of the truss ranges from 0 to 10m