GTX-A line begins partial operation from Sat. morning stocking 0 43 03.29 13:38 https://youtu.be/T5PSJCvqF5M + 6 GTX-A 노선 30일부터 개통 '출퇴근 20분대' 시대 열린다 The Great Train Express or GTX, which shortens the commute time to ...