One morning, sometime in my 2nd year of stay in China, my wife and I hailed a red VW Santana taxi for a trip to downtown Shenzhen.
The agreed price was RMB80/=, and the ride proceeded smoothly, till we were about 5 km to the destination. Suddenly the car stalled. The driver told us to pay him the RM80, while he would call in a replacement car.
So I gave him a RMB100 note, but he quickly returned to me, saying it was a fake note. Stunned, I pulled out another RMB100 note for him, and the same happened. Incredibly, it happened a 3rd time.
After we got home, I discovered in my wallet three RMB100 notes with identical serial numbers! Oh Silly Me! That driver had swapped fake notes for my real ones.