Zhejiang Dadi Steel Structure Co., Ltd., founded in 1994 and headquartered in Hangzhou’s core industrial belt, is a key enterprise under Longyuan Construction (Stock Code: 600491), controlled by Hangzhou Communications Investment Group Co., Ltd.

As a pioneer in green prefabricated buildings, the company has built core competitiveness through the “Steel Structure + N” model, establishing a full-industry-chain service system covering engineering design, intelligent manufacturing, general contracting, curtain walls, and architectural decoration. Its business footprint spans more than 30 countries worldwide.

The company holds multiple top-level qualifications, including Class I General Contracting for Construction Projects, Class I Professional Contracting for Steel Structures, Class I Professional Contracting for Curtain Walls, Class II Professional Contracting for Architectural Decoration, Class A Special Design for Light Steel Structures, Class B Special Design for Curtain Walls, Special Grade Qualification for Steel Structure Manufacturing, and Special Qualification for Metal Roofing Design and Construction. It is also certified under international ISO Quality, Environmental, and Occupational Health Management Systems, AISC (USA), CE (EU), GOST (Russia), and accredited in physical and chemical testing capabilities.

The company has completed over 3,000 steel structure projects worldwide, including exhibition centers, sports stadiums, airport terminals, high-rise buildings, industrial plants, steel bridges, and prefabricated buildings. More than 100 projects have been awarded top prestigious construction honors such as the Luban Prize for Construction, Zhan Tianyou Civil Engineering Award, National Quality Project Award, China Steel Structure Gold Award, Flying Apsaras Award, Shanghai Jingang Award, Qianjiang Cup, Magnolia Award, and others.

Representative domestic projects include: Gansu Exhibition Center 5-Star Hotel, Shanghai Golden Bridge R&D Project, Hengqin International Trade Tower, Qidong Yinzhou Butterfly Lake-view Tower Project, Jiangsu Garden Expo, Sunshine Valley Steel Structure for Shanghai Expo, Haikou Wuyuanhe Stadium, Jinjiang International Exhibition Center, Longshan Sports Center, Ruijin Sports Complex, Guiyang Longdongbao International Airport Terminal 3, Hangzhou Xiaoshan International Airport Terminal 1, Gree (Nanjing) Central Air Conditioning Plant, and China Duty Free Hainan International Logistics Center EPC Project.

Representative overseas projects include: New Phnom Penh International Airport (Cambodia), Airport Projects in Zambia, Lomé International Airport (Togo), Brazzaville Stadium (Republic of Congo), Justice House of the Ministry of Justice (Georgia), Zijin Bor Copper Project (Serbia), GCGV Steel Structure Module Project (USA), POSCO Indonesia Integrated Steel Plant, Power Plant in the Philippines, and BV Power Plant (Indonesia). Following project inspections, the company has also established strategic partnerships with multiple overseas owners and international EPC enterprises.

The company places great emphasis on talent acquisition and development, with more than 60 professionals including PhDs, professors, senior engineers with professorial titles, National Registered Structural Engineers, and U.S. Registered Civil Engineers. The Space Structure Research Center of Zhejiang University serves as the company’s technical backbone and long-term research partner, with Dadi acting as its experimental base to ensure the quality of design, fabrication, and installation.

The company also collaborates closely with more than ten universities, design institutes, and research organizations—including Zhejiang University, Tongji University, Shuren University, Zhejiang Vocational and Technical College Tongji Design Institute, Guangdong Architectural Design Institute, Zhejiang Institute of Architectural Design, and Hangzhou Institute of Architectural Design—on developing new structures, processes, and technologies.

The company adheres to a unique development path of “specialization, speed, and flexibility,” driving industrial innovation with technological strength. It continues to increase R&D investment, advancing BIM digital construction and intelligent welding technologies, and providing integrated solutions covering “design–manufacturing–construction–services.”

Leveraging the trillion-level platform resources of Hangzhou Communications Investment Group and Longyuan Construction Group, we work hand in hand with global partners to deliver landmark projects. Through full-cycle project management, CE-certified quality, and EPC turnkey services, we are setting new benchmarks for “Made-in-China with Intelligence” in the international market.

Upholding the philosophy of “Green Construction, Intelligent Empowerment,” Dadi is reshaping the future of architecture with high standards—building the skyline with steel backbones and creating world landmarks with Chinese craftsmanship.