Tianjin Longchuan Purification Engineering Co., Ltd. was established in 2000 with a registered capital of 35 million yuan. It is a professional company engaged in clean room design, installation and air-conditioning system installation. It has the national first-level qualification for professional contracting of mechanical and electrical equipment installation projects and professional contracting qualifications for building decoration and building intelligent projects. The company is now a national high-tech enterprise, a Tianjin Little Giant Enterprise, a Tianjin Famous Trademark Enterprise, and a Tianjin Contract-abiding Enterprise. Reputable enterprise, Tianjin patent pilot enterprise, director unit of Clean Technology Branch of China Refrigeration and Air-Conditioning Industry Association, director unit of Clean Room Technology Branch of China Electronics Society, president unit of Tianjin Federation of Industry and Commerce Purification Engineering Chamber of Commerce, vice chairman unit of Tianjin Purification Engineering Association ; The company cooperates closely with colleges and universities and scientific research units, and has become a teaching and scientific research base for the School of Environmental Science and Engineering of Tianjin University and the Department of Energy and Mechanical Engineering of Tianjin Urban Construction College.