I remember how long ago, this was the only MTR line to do announcements in Cantonese-English-Mandarin instead of Cantonese-Mandarin-English on the other lines. It also used to not have the announcements when the doors closed: only the chimes. This kinda made sense since passengers would usually not stand by the doors. After the door chime synchronization, the door announcements were added and the announcements changed in the Cantonese-English-Mandarin style on other lines.