Candidates take the national college entrance exam in a classroom of Hefei World Foreign Languages High School in Hefei, capital of east China's Anhui Province, June 7, 2014. The exam, known as the "gaokao", began on Saturday. A total of 9.39 million people have registered for the exam this year to vie for 6.98 million vacancies in universities and colleges. (Xinhua/Liu Junxi)