A teacher gives instructions of healthy sleeping body position on the World Sleep Day at a kindergarten in Kaifeng, central China's Henan Province, March 21, 2016.(Photo: Xinhua/Li Junsheng)
RIGHT BG
A teacher gives instructions of healthy sleeping body position on the World Sleep Day at a kindergarten in Kaifeng, central China's Henan Province, March 21, 2016.(Photo: Xinhua/Li Junsheng)
