Two students take a nap on their seats during a training class in an indoor stadium in Jinan city, East China's Shandong province, July 15, 2012. Some 3,500 students, who plan to take the national graduate school entrance examination in 2013, gathered in the stadium on Sunday to attend a large-scale training class organized by a training agency. [Photo/Asianewsphoto]

A student yawns during a training class in an indoor stadium for next year's national graduate school entrance examination in Jinan city, East China's Shandong province, July 15, 2012. [Photo/Asianewsphoto]