The registration address of dong zhiqiang city hard materials ltd. Is located in room 103, located at road no. 26, dang town compound, dong zheng city, guangdong province. The registration authority is the market supervision authority of dong zheng city. The legal entity is represented by gu zheng zheng, and its activities include sales of super hard materials, sand wheels, knives and cutting and polishing tools; and sales of tungsten steel slugs, measuring gear, filtering paper, grinding sticks, grinding gear, polishing materials, grinding materials, metal materials. (projects subject to legal approval to operate with the approval of the relevant department)