運賃値上げの補償で増発へ！ ソウルメトロ4号線・7号線ダイヤ改正(2023年10月30日)
Train addition for compensation of fare raise on Seoul Metro Line 4 and 7 on October 30, 2023.
https://www.train-times.net/article/seoul20231030
Rather than train addition, I want Seoul Metro to add more Express trains on multiple lines to reduce travel time. GTX, which will play the similar role, will be inaugurated though. It won't be enough.
