Firefighters conduct emergency drill at Potala Palace in Lhasa, China's Tibet

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Firefighters conduct an emergency drill at the Potala Palace in Lhasa, southwest China's Tibet Autonomous Region, May 7, 2019. (Xinhua/Li Xin)

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A firefighter is seen conducting an emergency drill at the Potala Palace in Lhasa, southwest China's Tibet Autonomous Region, May 7, 2019. (Xinhua/Li Xin)

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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)

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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)

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Firefighters conduct an emergency drill at the Potala Palace in Lhasa, southwest China's Tibet Autonomous Region, May 7, 2019. (Xinhua/Li Xin)

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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)