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hong
kong
china
mtr
travel
urban
rail
train
timelapse
time
lapse
modern
transport
city
railway
platform
transportation
station
hongkong
clock
watch
door
stairs
elevator
population
chinese
business
metro
people
tunnel
carriage
line
asia
fast
subway
mass
commute
crowd
busy
technology
metropolis
journey
corridor
way
popular
crowded
railroad
perspective
tube