A long line for the Beijing bus greets weary commuters in Yanjiao on June 16, 2014.

Another long day at work comes to an end in Guomao area, Beijing, but these commuters need to wait in the dark in another long line for their bus home to Yanjiao on April 22, 2015.

Even though buses have a yellow no-standing area around their rear door, the commuter routes are so packed with people that passengers, like these on July 9, 2014, spill into the area and get jammed against the door. Photos by Wang Jing / China Daily

A driver tries to use his mirror for a clear look at the road but so many passengers have crowded onto his bus in Yanjiao that they block his view on July 9, 2014.

Weary passengers doze on an early morning bus from Yanjiao to Beijing on Sept 2, 2014. Lack of sleep is common in this city built as somewhere to sleep.

Sometimes the wait is just too much. A woman climbs over a fence to get to the front of the line for her bus home from Beijing on April 22, 2015.

A group of people chose a carpool as an alternative to get back to Yanjiao after a day's work in Guomao in the Central Business District of Beijing, on April 22, 2015.