Under the support of energy-saving policy, China has begun to focus on the application of energy storage products in the field of rail transit. As the first scheme design and system integrator of super capacitor energy storage device for urban rail transit in China, Liaoning Baina Electric Co., Ltd. has provided energy storage devices for Shenyang light rail, Beijing Metro and Guangzhou Metro respectively. The results are highly recognized by experts and customers The product has been applied in batch on Shenyang Hunnan ground light rail line, and has been successfully put into trial operation on Beijing Metro Line 10.