Only in China: The car seems consuming wood!
Some Chinese people are not get used to law enforcement or not willing to comply with the laws or regulations.
Cars are subject to have an emission check every two years, but there are some "exceptions".
One day I was taking a taxi in Beijing, a car in front of ours blowing out black gas from the exhaust!
I was puzzled.
"Oh, man. The car seems consuming wood!" the driver explained.