Ningbo Baosi Energy Equipment Co., Ltd. was established in 2005. The company is primarily engaged in the research & development, production, and selling of the core part of the screw compressor as well as the entire compressor. BAOSI is the leading manufacturer and supplier of screw air ends and screw compressor. Leaning on self-innovated core screw technology, the energy equipment industry has steadily developed and the technology team at BAOSI has continued to grow. The company has more than ten years experience in the research and manufacturing of screw rotors and air ends. BY 2015, production capacity reached 250,000 machines per year, and in April 2015, the company began to issue stocks on the Shenzhen Stock Exchange. The stock code is 300441. So far, the company has created a series of products including screw compressor air ends (low pressure, ordinary pressure, medium pressure, two stage, etc.), screw air compressors, two vacuum pumps, refrigeration screw air compressors, oil-gas multiphase pumps, flammable gas (CBM, oil-gas, petrochemical exhaust, biogas, shale gas, and other industrial gas), and recycling engineering equipment. After going public, the company’s total market value has reached over 10 billion RMB, with about 2,000 employees and 173,333㎡ factory and office area. Assets include nearly 100 units of Japanese Mazak machining centers, nearly 100 sets of screw rotor machines, 9 sets of German KAPP grinding machines, 3 sets of British Holroyd grinding machines, etc. In regard to the protection of intellectual property rights, the company has applied for more than 50patents domestically and abroad. stage energy-saving screw air compressor, medium pressure screw air compressors, screw