The registration authority is the new river market supervisory authority, represented by the legal person zhang xiaomin, operating in the areas of shut-off, locking doors, rubber water, pollution fences, decontamination machines, transporters, traps, watermen's metal structures, rubber stoppages, gas dams, hydraulic dams, masonry machinery, environmental protection kits, sewage treatment kits, hydraulic kits and accessories, and sales; high-pressure support equipment, electric machines, cabinets, electrical lines, cables, lifting equipment, pipes, pipes and steel sales. (projects subject to legal approval may not operate without the approval of the relevant department)