General projects: mining machinery manufacturing; mining machinery sales; environmental protection special equipment manufacturing; general equipment manufacturing (excluding special equipment manufacturing); mechanical and electrical equipment manufacturing; machinery and equipment sales; mechanical equipment sales; mechanical parts and components sales; mold manufacturing; mold sales; metal material sales; coal and products sales; software development; information system operation and maintenance services; technical services, technology development, technology exchange, technology transfer, technology promotion; enterprise management consulting; business training (excluding education and training, career) Skills training, etc. that require permission); import and export of goods; import and export of technology; import and export agents; machinery and equipment leasing; housing leasing; non-residential real estate leasing; land use rights leasing.