Hengtong group, a national innovative enterprise in China's optical fiber network, smart grid, big data Internet of things, new energy and new materials, financial investment and other fields, has more than 70 wholly-owned and holding companies (three of which are listed at home and abroad), It is the global optical communication and energy interconnection system integrator and network service provider, the top three global optical fiber communication, China's top 500 enterprises and China's top 100 private enterprises.