Shenzhen Y&D electronic information co.,ltd.(Shenzhen Y&D) is committed to safety engineering, advanced computing and mobile communication technology development,is deeply rooted in the field of rail transportation, and is the support unit of National Engineering Laboratory for the Safety Technology of Urban Mass Transit System, the construction unit of Safety Evaluation Center for industrial control system of rail transit, and the Standing director unit of China Cyberspace Security Association. According to the characteristics of urban rail transit in China, such as dense passenger flow, high degree of network, and great hidden danger to public safety, based on "software defined" and "data driven" information technology, Shenzhen Y&D is committed to exploring the reconstruction security system in the urban rail transit network space, fully support the "manufacturing country" strategy implementation.