A student takes a nap on a desk during his lunch break in a classroom in Hefei, Anhui province, June 2, 2012. The National College Entrance Exam, or "Gaokao", is held in June every year. Picture taken June 2, 2012. [Photo/Agencies]

Good-luck couplets are put up outside a hotel room in Shunqing district of Nanchong, Sichuan province, on May 28, 2012. As the National College Entrance Exam is approaching, many hotels in the city prepare special rooms for the exam, including "nutrition packages". The National College Entrance Exam, or gaokao, is scheduled for June 7-8. [Photo/Xinhua]