Rescuers work at the site of factory collapse in Yilong New Area of the Bouyei-Miao Autonomous Prefecture of Qianxinan, southwest China's Guizhou Province, June 16, 2014. Five workers have been rescued but four others remain trapped after the collapse of a steel tunnel at the ferroalloy plant here, which occured at 10:20 p.m. on Sunday. The cause of the accident is being investigated. (Xinhua/Liu Yongsong)
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