MTR to convert four-car trains into eight-car trains on Ma On Shan Line November 3, 2016 | Asia Pacific News Hong Kong MTR Corporation Limited (MTR) has announced plans to increase capacity on the Ma On Shan Line by replacing four-car trains with eight-car trains. Test runs of the eight-car trains are schedu... This content is available to only subscribers. Username or E-mail Password Remember Me Forgot Password