The full Tuen Ma line will open on June 27. SCMP predictably came up with a strange headline: Hong Kong MTR: key section of costly Sha Tin-Central link to open by June 27 after repeated delays
A key stretch of the long-overdue Sha Tin to Central link, Hong Kong’s most expensive rail project, will fully open on June 27 after repeated delays and cost overruns, the city’s transport minister has said, while pledging the government will learn lessons from the saga.
RTHK got it right with its headline: MTR's Tuen Ma Line to get going on June 27 (yes, the name comes from the districts at the two ends), whilst HKFP had a rather oblique headline: Two new MTR stations to open next month, forming Hong Kong’s longest metro line. I think the word you may be looking for is “completing”. Or, more accurately, joining the Ma On Sha Line with West Rail.
I still think this is not a great name - at one stage there was a suggestion that it would be the East-West line, because it goes from the Eastern New Territories to the Western New Territories (and for part of it you’d only have to add a few letters at the start of the name, so that would save money). It would avoid confusion with the Tsuen Wan line. Or is that just me?