The Jiangnan Science City International Business Exhibition Center (Hangzhou Government Storage [2023] No. 124) and the underground parking lot on the south side (civil air defense project) have a total construction area of approximately 39,208 square meters, with an above-ground construction area of about 20,953 square meters and an underground construction area of approximately 18,255 square meters. The single-span steel structure is 38.6 meters. Among them, the Jiangnan Science City International Business Exhibition Center (Hangzhou Government Storage [2023] No. 124) project mainly involves the construction of characteristic commercial and business buildings. The project covers an area of 13,856 square meters, with a total construction area of approximately 35,300 square meters, including 20,780 square meters of above-ground construction area and 14,520 square meters of underground construction area. The main construction contents include civil engineering, installation engineering, outdoor ancillary works, fire protection engineering, etc. South Underground Parking Lot (Civil Air Defense Project) : The project covers an area of 7,525 square meters, approximately 3,908 square meters, including 173 square meters of above-ground construction area and 3,735 square meters of underground construction area. The main construction contents include the construction of an underground parking lot and above-ground management rooms, etc.