General items: 5G communication technology services; Manufacturing of communication equipment; Sales of communication equipment; Manufacturing of special equipment (excluding manufacturing of licensed professional equipment); Mining machinery manufacturing; Sales of mining machinery; R&D of distribution switch control equipment; Manufacturing of distribution switch control equipment; Sales of power distribution switch control equipment; Geological disaster management services; Technical services for geological exploration; Manufacturing of special geological exploration and seismic instruments; Sales of special geological exploration and seismic instruments; Sales of metal materials; Sales of coal and products; Motor manufacturing; Manufacturing of mechanical and electrical equipment; Sales of mechanical and electrical equipment; Software development; Software sales; Artificial intelligence application software development; Artificial intelligence hardware sales; Manufacturing of industrial automatic control system devices; Sales of industrial automatic control system devices; Engineering technical services (excluding planning management, survey, design and supervision); Technical service, technical development, technical consultation, technical exchange, technology transfer and technology promotion; Information system integration service (except for licensed business, it can independently operate projects not prohibited or restricted by laws and regulations)