![Firefighters conduct an emergency drill at the Potala Palace in Lhasa, southwest China\'s Tibet Autonomous Region, May 7, 2019. (Xinhua/Li Xin)](http://www.ecns.cn/hd/2019/05/08/f24768b6698e455c90f87fcf53f8c893.jpg)
Firefighters conduct an emergency drill at the Potala Palace in Lhasa, southwest China's Tibet Autonomous Region, May 7, 2019. (Xinhua/Li Xin)
![Firefighters connect fire hoses during an emergency drill at the Potala Palace in Lhasa, southwest China\'s Tibet Autonomous Region, May 7, 2019. (Xinhua/Li Xin)](http://www.ecns.cn/hd/2019/05/08/8e149519cdf049c0832bf52fd46c7f91.jpg)
Firefighters connect fire hoses during an emergency drill at the Potala Palace in Lhasa, southwest China's Tibet Autonomous Region, May 7, 2019. (Xinhua/Li Xin)
![Firefighters run in an emergency drill at the Potala Palace in Lhasa, southwest China\'s Tibet Autonomous Region, May 7, 2019. (Xinhua/Li Xin)](http://www.ecns.cn/hd/2019/05/08/6f7fe67816364ba3af400849ffd7bc4e.jpg)
Firefighters run in an emergency drill at the Potala Palace in Lhasa, southwest China's Tibet Autonomous Region, May 7, 2019. (Xinhua/Li Xin)
![Firefighters conduct an emergency drill at the Potala Palace in Lhasa, southwest China\'s Tibet Autonomous Region, May 7, 2019. (Xinhua/Li Xin)](http://www.ecns.cn/hd/2019/05/08/86be19f4d439467db171809ac93b96ca.jpg)
Firefighters conduct an emergency drill at the Potala Palace in Lhasa, southwest China's Tibet Autonomous Region, May 7, 2019. (Xinhua/Li Xin)
![A firefighter runs in an emergency drill at the Potala Palace in Lhasa, southwest China\'s Tibet Autonomous Region, May 7, 2019. (Xinhua/Li Xin)](http://www.ecns.cn/hd/2019/05/08/34761ec70f094bcbafd3a9ac981daaa1.jpg)
A firefighter runs in an emergency drill at the Potala Palace in Lhasa, southwest China's Tibet Autonomous Region, May 7, 2019. (Xinhua/Li Xin)