TSINGHUATONGFANG CO.,LTD. is primarily engaged in the Internet services and terminal industry. It is also engaged in the smart city, public safety, environmental protection, as well as science and technology park industries. The Internet service and terminal industry chain includes chip business, hardware terminal industry and Internet content services. The smart city industry chain includes ubiquitous network, intelligent building, intelligent transportation system and urban heating network. The public safety industry chain includes security systems and defense industry. The energy saving and environmental protection industry chain includes building energy saving, industrial energy saving, semiconductor lighting and waterworks.