Like example, before 11/2017, 651-653 used on extra train during morning peak hours, but start at 11/2017, these 3 trips were added on regular timetable.
@@truckotis8209 One train on regular timetable now. This train is 050. The 600s may be considered T50 Special Amended: Now New T50 85428/41428 34735/41438 37745/89453