Policemen attend an anti-terrorism drill named "One-minute Handling" at the commercial district of Xidan in Beijing, capital of China, Aug. 29, 2014. (Xinhua/Li Wen)

A policeman attends an anti-terrorism drill named "One-minute Handling" at the commercial district of Xidan in Beijing, capital of China, Aug. 29, 2014. (Xinhua/Li Wen)

Policemen attend an anti-terrorism drill named "One-minute Handling" at the commercial district of Xidan in Beijing, capital of China, Aug. 29, 2014. (Xinhua/Li Wen)

 Policemen attend an anti-terrorism drill named "One-minute Handling" at the commercial district of Xidan in Beijing, capital of China, Aug. 29, 2014. (Xinhua/Li Wen)  

Policemen attend an anti-terrorism drill named "One-minute Handling" at the commercial district of Xidan in Beijing, capital of China, Aug. 29, 2014. (Xinhua/Li Wen)

Policemen attend an anti-terrorism drill named "One-minute Handling" at the commercial district of Xidan in Beijing, capital of China, Aug. 29, 2014. (Xinhua/Li Wen)