In January this year, the Ministry of Transport issued the "Urban rail Transit Signal System Operation Technical Specifications (Trial)" (referred to as the "Technical Specifications"), aimed at further improving the reliability, availability, maintainability and safety of urban rail transit signal systems. Around the specific requirements of the "Technical Specifications", a number of experts from rail transit operators, design units, research institutions and signal system integrators discussed and exchanged views on the development status and trends of rail transit signal systems.