Shenzhen city polytechnic ltd. Has a registration address in madan street, shenzhen city. The registration authority is the shenzhen city market supervisory authority, representing li zhenhua, which operates in the following areas: chemical products (excluding hazardous chemicals), precision hardware, automation equipment, plastics, technology development and marketing; domestic trade, import and export of goods and technology. (except in laws, administrative regulations or decisions of the state council prohibiting and requiring the approval of projects prior to registration, such as the production of chemical products (excluding hazardous chemicals), precision hardware, automation equipment and plastics。