Students about to take the national college entrance examination walk into their test site in Guiyang, Southwest China's Guizhou province, on Monday June 7, 2010. The annual test, China's reigning yardstick for college admissions, has become a national phenomenon, or obsession sometimes, for which police clear the roads for exam-sitting students and freight trucks are asked to stop tooting. However, the national event has witnessed an increase of frauds in recent years, such as identity forgeries and high-tech cheating. [Photo/Xinhua]

A student about to take the national college entrance examination picks up a free bottle of water at a school in Guiyang, Southwest China's Guizhou province, on Monday June 7, 2010. [Photo/Xinhua]