It was no surprise. Train arrivals are displayed on boards that indicate the destination and time until the next train arrives. Over 2.2 million passengers ride the system each day. Inside an MTR train late at night. There are no vestibule doors, only end doors opposite ends of the train.
Most people stand on the train.
They are air-conditioned and comfortable and have animated signs that show your location and destination and which side the doors will open. Signs on the platform indicate when the next train will arrive. A northbound KCR train arrives at Kowloon Tong, the Hong Kong equivalent of 125st. There are no subway stations at the southern terminal of Hung Hom in Kowloon, but you can ride a Star Ferry from there to Hong Kong, or catch a bus. Because of the subway connection, Kowloon Tong is a very busy station.