The article discusses the importance of developing a high-capacity inter-city rail mass transit system in China to meet the increasing traffic demand. The researchers used simulation and a bi-level model to analyze factors like speed, energy consumption, distance between stations, and ticket fares to optimize rail transit construction and passenger flow. The study aimed to find the best balance between rail transit and other modes of transportation for both planners and residents. The results provide valuable insights for managing inter-city rail operations in China.