China has one time zone. People outside of Beijing and the eastern Chinese seaboard don't experience sunrise until as late as 10 AM in some places. I don't find

China has one time zone. People outside of Beijing and the eastern Chinese seaboard don't experience sunrise until as late as 10 AM in some places. I don't find that terribly sensible, frankly. It might make scheduling communication easier, but I agree with a lot of the other comments pointing out that 9 AM actually means something to people as far as time of day goes.