Urban rail transit equipment manufacturing; Transformer, rectifier and inductor manufacturing; Power distribution switchgear equipment manufacturing; High-speed rail equipment and parts manufacturing; Railway rolling stock parts manufacturing; Power transmission and distribution and control equipment manufacturing; Photovoltaic equipment and components manufacturing; New energy prime mover equipment manufacturing; Power facility equipment manufacturing; Electrical signal equipment device manufacturing; Electrical accessory manufacturing; Mechanical and electrical equipment manufacturing; Electrical equipment manufacturing; Industrial robot manufacturing; Mica product manufacturing; Rubber product manufacturing; Electrical equipment repair; Foreign contracted projects; Nuclear power equipment complete set and engineering technology research and development; Metal processing machinery manufacturing; Metal structure manufacturing; Steel rolling processing; Computer system services; Software development; Enterprise management consulting; Internet of Things technical services; Internet of Things technology research and development; Technology intermediary services; Artificial intelligence basic software development; Artificial intelligence application software development; Computer software and hardware and auxiliary equipment retail; Communication equipment sales; Electronic product sales; Network technical services; Security equipment sales; Office supplies sales; Technical services, technical development, technical consulting, technical exchange, technology transfer, technology promotion; Information technology consulting services; Internet sales (excluding goods requiring sales permits); Information system operation and maintenance services; Data processing and storage support services; Power facility installation, repair, and testing; General contracting of housing construction and municipal infrastructure projects