Photo taken on May 16, 2012 shows the empty Wuchang primary school near an accident site in Hangzhou, capital of east China's Zhejiang Province. Classes were suspended here. A truck, carrying 27 tons of vinyl chloride, turned over due to a traffic accident happening on a beltway of Hangzhou on May 14, 2012. The treatment is still under way up to now. [Xinhua]