Fire fighters carry "an injured man" during a fire fighting drill held in a school playground in the quake-hit Baoxing County, southwest China's Sichuan Province, May 2, 2013. The school playground was served as the largest evacuation settlement for nearly 4,000 displaced people in Baoxing after the strong earthquake occurred in last month. [Xinhua]

Fire fighters spray water during a fire fighting drill held in a school playground in the quake-hit Baoxing County, southwest China's Sichuan Province, May 2, 2013. The school playground was served as the largest evacuation settlement for nearly 4,000 displaced people in Baoxing after the strong earthquake occurred in last month. [Xinhua]

Fire fighters try to put out "a fire" during a fire fighting drill held in a school playground in the quake-hit Baoxing County, southwest China's Sichuan Province, May 2, 2013. The school playground was served as the largest evacuation settlement for nearly 4,000 displaced people in Baoxing after the strong earthquake occurred in last month. [Xinhua]

A volunteer (L) helps a fire fighter roll a water hose after a fire fighting drill held in a school playground in the quake-hit Baoxing County, southwest China's Sichuan Province, May 2, 2013. The school playground was served as the largest evacuation settlement for nearly 4,000 displaced people in Baoxing after the strong earthquake occurred in last month. [Xinhua]