1. Annual statistics and analysis report on urban rail transit in 2020;China Association of Metros,2021
2. Causes of derailment of a train in the Kunming subway system has been identified;Yang,2013
3. A stampede disturbance happens in the Shenzhen subway;Wangyi,2015
4. Railroad turnouts failure has been repaired;Yang,2018
5. Signal equipment failure in Shanghai subway line 12 has been repaired;Wang,2019