The registration address of shenzhen city c. E. T., ltd., is located in shenzhen city, on the street of yonggang district, located at block b. 101, located in shenzhen city. The registration authority is the shenzhen market supervision authority, represented by a legal person, wu sung-hyung. Production of instruments for monitoring and detection of pollutants in water quality; marketing of instruments for monitoring and detection of pollutants in water quality; manufacture of gas, liquid separation and pure equipment; manufacture of specialized mechanical equipment for water resources; sale of gas, liquid separation and pure equipment; sewage treatment and their reuse; marketing of ecological materials; sale of specialized equipment for environmental protection; technical services, technology development, technical advice, technology exchange, technology transfer, technology diffusion; environmental advisory services; water pollution prevention and control services; water-related advisory services. (b) licensing projects (in addition to legally approved projects, operating on an autonomous basis under an operating licence): home-based environmental products, water purification products, filtration cores, filters, and research and development and marketing of filters. (a project subject to legal approval may only be carried out with the approval of the relevant department, subject to the approval documents or licences of the relevant department)