Our tour bus had a little crash with another car when we were going to the Great Wall.
I don't know where is the worst place to drive: China or Mexico City... honestly I knew it would happen any time soon during our visit to Beijing so, watch out!
Be careful when crossing streets. Not onlky do you have to watch out for for the usual cars and buses, but also bicycles and scooters. These frequently dont abide by the rules as the 4 wheeled vehicles.
Be careful on pavements -many holes, spikes, levels etc. You get used to it after a while
Be even more careful crossing roads -try and be with someone else or in a group
Potentially dangerous foods are everywhere -enjoy!
The worst is probably McDonalds and other 'western' cuisine. Pizza Hut is a possible exception.
Public transport is good esp subway. Busses are a good way of getting around.
Also, be careful crossing streets, traffic is crazy and really busy, as you can see in the picture!! Until you know what you're doing shadow someone or use the overpasses. Same for bike riding.
Traffic... Who said rush hour traffic was bad back home...jeez. Careful with the bicycles as well :).
The street are crowded with buses, cars and even these 3-wheeled motorized bikes, so be careful when crossing the street.