I visited Xi'an about two weeks ago, this was my first trip to Xi'an, but my 4th or 5th time in mainland China. I've also visited a fair number of other countries.

I notice something in Xi'an that I've never really seen before and I wanted to ask if anyone can explain it.

Xi'an has a number of scooters/motorbikes on the road, some are mototaxi drivers. Xi'an also has Thai-style tuk tuks.

Anyway, I noticed that a strangely high percentage (50%?) of the scooters and tuk tuks I saw driving around Xi'an at night weren't using their headlights. Why not? Are their headlights all broken? Are they trying to save the bulb life? Are they trying to save gas by not using headlights?

Is using headlights as a sign of being wimp in Xi'an/China?

I never noticed this phenomenon in Beijing or Shanghai, was I not paying attention?