as with other airport express stations, the airport express and tung chung line are separated with a different paid area for the airport express, thus passengers changing between two lines must go downstairs and past through floor u1, and then go upstairs again. in tsing yi station, the 4 platforms are constructed in a stacked arrangement, with platforms 1 and 3 above platforms 2 and 4. platform 2 is only used to allow travellers coming from the hong kong international airport to alight, except between 7 am and 10 am on mondays to saturdays, when morning express services are available.