The Chinese are a wily bunch. They are damn clever.
In addition to refilling used water bottles with tap bottle and peddling it as spring water, they also stand and squat on highways looking for work. You may see this in U.S. cities - will work for food, or some equivalent.
What they do, we found out, is squat on the highway with a sign that says something like "will show you around for cash," but it could say "dumb tourist, give me money and I will fuck you up the ass."
I don't think it said the later. That would be mean. I don't think that happens.
If you are new to a city and need help getting around and finding your way, these people will show you the tourist sites and other places of interest for a price. Simply pick one of them up on the side of the road and cart him or her around.