The registered address of zhejiang tiansai tsai technological co. Ltd. Is the industrial district of zhejiang county, where the mayor of hingzhou, zhejiang province, zheung county, zheng an town, is the chang xian county market supervisory authority, represented by a legal person, guo jianyong, who operates in the areas of thermal smelting and processing; the development of biotechnology, technical advice, transfer of results; the sale of chemical products (other than hazardous chemicals and vulnerable chemicals), packaging materials; and the import and export of goods. (projects subject to legal approval may not operate without the approval of the relevant department)