The registration address of ryda mines mechanics ltd. Is 50 metres south of the north-south rysinga factory road in the town of ziining, shandong province. The registration authority is the market supervision authority for the city of zining, which operates on behalf of zhang guangzhou. It includes engineering machinery, cranes, stakers, engineering tractors, garden machinery, road engineering equipment, mine machinery equipment and accessories, mine transport vehicles, underground dumpers, transformers, four-wheel tankers, underground transporters, tracked transport vehicles and accessories, mine electrical equipment, construction materials (without dangerous chemicals), machinery and accessories (without special equipment above), hardware products, heavy engineering machinery, agricultural machinery spare parts, and engineering machinery maintenance. (projects subject to legal approval may not operate without the approval of the relevant department)