The registration address of the mayor of east china rock mechanical science and technology ltd. Is located in room 103, no. 19 qingdong road, tong tong tong, dongdong city, guangdong province. The registration authority is the market supervision authority of east china city, represented by a legal person and includes research and development, production and distribution, processing: general mechanical equipment, plastic packaging, automated mechanical equipment, intelligent mechanical equipment, specialized mechanical equipment and accessories, metal products, hardware spare parts; installation, repair, maintenance, technical advice, technical services; import and export of goods or technology (except for goods and technology which are prohibited by the state or involve administrative authorization). (projects subject to legal approval are not allowed to operate without the approval of the relevant authorities) i'm not sure