Runjian Co., Ltd., a communication technology service company, engages in the communication network construction and maintenance business in China. The company offers communication network management and maintenance services, including communication consulting design, communication engineering, communication facility operation and maintenance, and product integration; data center operation and maintenance management services. It also provides information network management services, which include smart campus and transportation, AI and big data, cloud, industrial Internet of Things, grid digitalization, social governance, financial media, 5G application technology research and development, industry ERP, smart park, and digital village services. In addition, the company offers energy network management and maintenance services, comprising power project construction, maintenance and operation, design consulting services, information system development, power Internet of Things technology application, energy-saving energy storage, new energy, and comprehensive energy project investment services. Further, it engages in provision of engineering supervision consulting, power engineering construction, and information system integration services; and production and sale of communication and electronic products. The company was formerly known as Runjian Communication Co., Ltd. and changed its name to Runjian Co., Ltd. in April 2019. The company was founded in 2003 and is headquartered in Guangzhou, China.