Zhengfan, a legal person, is represented by zhengfan, who operates in general: technical services, technology development, technical advice, technology exchange, technology promotion; mechanical equipment research and development; generic equipment manufacture (other than special equipment manufacture); manufacture of specialized equipment (other than licensed specialized equipment); sale of machinery equipment; import and export of goods; import and export of technology; import and export agents (in addition to legally authorized projects, operating independently of the law)