i also remember the time when the YCK to TPY(5
stations) stretch was first open for service. later more and
more stations progressively opened. that time the East line was
not yet ready and the North line was through service to
the West line. can go from AMK to Clementi without
transferring.
This is correct. It should also be technically possible to
operate an AMK - Raffles Place - Jurong East - Woodlands - AMK
circle line in both directions.