Photo taken on Oct. 16, 2019 shows a flashover experience room at a national hazardous chemicals emergency rescue base of Sinopec Zhongyuan Oilfield in Puyang, central China's Henan Province. The national hazardous chemicals emergency rescue base in Puyang is a comprehensive training base integrating training, drill, appraisal, seminar and competition regarding emergency fire fighting. (Xinhua/Cai Yang)