General Projects: Sales of new ceramic materials; Technical services, development, consultation, exchange, transfer, and promotion; Manufacturing of special ceramic products; Sales of special ceramic products; Manufacturing of non-metallic mineral products; Sales of non-metallic minerals and products; Manufacturing of mining machinery; Sales of mining machinery; Research and development of valves and cocks; Manufacturing of general valves and cocks (excluding special equipment manufacturing); Sales of valves and cocks; Sales of plastic products; (Operate independently and lawfully according to business license, except for activities that require special approval)