The project is located in Shenzhen, Guangdong. From 2015 to 2017, CYG Sunri had delivered dozens of online monitoring devices for cable grounding circulation, which are applied to variousscenarios such as engineering wells, tunnels, indoor substations, outdoor substations, etc. The operating environment is harsh, the operation and maintenance is difficult, the equipment installation conditions are complex and diverse, the equipment has long been soaked in water and electromagnetic interference are serious. Relying on leading reliability design and high-level protection, the equipment delivered by CYG Sunri has been running stably so far, providing safe, reliable and intelligent monitoring services to the customer.