Firemen work at the scene of a chemical plant blast in Baiyun District of Guiyang, capital of southwest China's Guizhou Province, Feb. 25, 2013. At least five people were injured in a chemical plant explosion in Guiyang on Monday morning. Part of the plant, which belongs to Bestchem, a local chemical company, was still burning by noon. Firefighters have been deployed to the blast scene while local environmental authorities are keeping an eye on the air quality. (Xinhua/Liu Xu)