I read an article regarding motorcycle riding in China from the past. It said you can not operate your headlamp if another vehicle is approaching within 500 ft. Running lights provide sufficient light to drive safely. Back 20 years ago that seems reasonable as speeds and traffic were less.

The thought was as a courtesy you should turn off headlamp so as not to blind oncoming driver. So most motorcycle drivers never used headlamps as they would risk breaking rules-law. Debunks the cost saving argument...supports compliance with communist rules.