These two models of rolling stock are from the former KCRC network (KCR East Rail, West Rail and Ma On Shan Rail). They did not receive major changes after the merger of the two companies except for the updated route map, the exterior company logo and such. The capability of this EMU fleet is similar to those on the urban network. Starting from 2015, the West Rail and Ma On Shan line trains have been lengthened to 8 cars while the East Rail line 12 car sets have been withdrawn from the line in 2021. All train sets will receive larger TV displays and dynamic route map displays above every door, and will run on the Tuen Ma line in the future.