The registration address of yingchun city empirical technology development co. Ltd. Is at c3-hinghai international community no. 1001 on the intersection of riverside street and the southern ring road in changchun city. The registration authority is the south customs subdirectorate of the changchun city market supervisory authority, which operates on behalf of zhang woo-tong and includes the development of magnetic applications; the design of magnetic products; the development and testing of scientific instruments; the manufacture and sale of magnetic and electrical products, instruments and instruments; the sale of electronic products, metal materials and non-metal materials; and the processing of mechanical products (projects subject to the approval of the law and subject to the authorization of the relevant authorities)