We took a bus trip to Hainan this week. On the way back, the bus turns off the frreeway near a little one-intersection town where the road is chewed up for repairs. The speed is about 5 mph. Three boys on a motorcycle come up behind the bus and pull off the license plate, offering it for sale back to the driver for ¥200 (about $30). One of them saw me taking pictures and asked to see the camera, with his buddies joining in. I politely didn't laugh, and didn't move. Once in town, there's a police checkpoint, where, they made us stop and put the plate back on. No corruption involved (I don't think) - this was just 3 kids on a motorcycle. The police were checking papers and licenses. Police don't investigate much of anything. The solution is to make sure your plate is securely fastened. This plate had the round-head screws, but was only mounted with sheet metal screws into fiberglass.