Police officers join a fire drill in front of Qi Nian Dian (Hall of Prayer for Good Harvest) at the Temple of Heaven Park in Beijing on September 14, 2015. (Photo/CFP)
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Police officers join a fire drill in front of Qi Nian Dian (Hall of Prayer for Good Harvest) at the Temple of Heaven Park in Beijing on September 14, 2015. (Photo/CFP)