Citizens lie on a bench for a sleep in Jinan, capital of east China's Shandong Province, March 16, 2015. March 21 is the 15th World Sleep Day. (Xinhua/Guo Xulei)
Citizens lie on a bench for a sleep in Jinan, capital of east China's Shandong Province, March 16, 2015. March 21 is the 15th World Sleep Day. (Xinhua/Guo Xulei)