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Firefighters in Chongqing, a city in Southwest China, have put out an outbreak of major wildfires caused by extreme heatwaves in only nine days. They dealt with this by lighting a fire and linking it with the burning forest fire in 1． opposite direction. The two fires 2． (lead) to a sudden shortage of oxygen which effectively stopped the fire. On the night of August 25, forest fire teams from neighbouring Yunnan province decided to set a backfire with these two conditions. Firstly, a forest isolation（隔离）belt was set by large numbers of volunteers, 3． (clear) away any possible combustible（易燃的）materials for the ongoing wildfire. So when this fire came, nothing was left to bum. Secondly, firefighters grabbed a perfect chance when the wind changed its direction. They followed the wind blowing from the north to the south and put out a new fire 4． flared（燃烧）up and ran into the wildfire.

The whole process took 3 hours and around midnight, the 5． (new) lit backfire cut off and put out the powerful fire. 6． this may sound simple, it required clever tactics（策略）and a great amount of joint effort. With fifty professional firefighters at the front and 7． (thousand) of armed police and volunteers in the back, the team finally brought the fire under 8． (control).

9． the next morning, all the forest fires in Chongqing had been put out. It was a shining witness to the 10． (city) emergency response and quick action.