Hi,
I did the china tour in October this year, and took both my canon
dslr and zoom and a smaller pocket size camera.
The reason for two, was the dslr for the day trips, great wall, pandas and the like and in the evening the smaller pocket digital for the night food market etc. It was safe to take either camera out and you see many people out and about with very expensive equipment, just like anywhere in the world just be cautious. I use a pac safe camera strap on the dslr, which is not only strong but doesn't display the cameras name.
As for weight, put the camera in your carry on, which is advisable anyway, I had no real problems other than leaving a lithon battery in my case, any batteries must be in your carry on luggage, and they can pick them up using the machines at the airports.
Both cameras gave quality and convenience and I came back with far too many pictures, 1200, but they will remind me of a excellent trip for a long time to come. Hope that helps.