A staff member uses a water hose during a firefighting sports meeting at the Potala Palace in Lhasa, Tibet autonomous region, on Wednesday. The event, co-organized by the palace's management and fire departments, aims to popularize fire prevention knowledge to protect the structure, a world cultural heritage complex with thousands of chambers. [Photo by HE PENGLEI/CHINA NEWS SERVICE]

Firefighters take part in a firefighting sports meeting at the Potala Palace in Lhasa, Tibet autonomous region, on Nov 13, 2019. [Photo/China News Service]

Firefighters take part in a firefighting sports meeting at the Potala Palace in Lhasa, Tibet autonomous region, on Nov 13, 2019. [Photo/Chinanews.com]

A staff member uses a water hose during a firefighting sports meeting at the Potala Palace in Lhasa, Tibet autonomous region, on Nov 13, 2019. [Photo/Chinanews.com]

Firefighters take part in a firefighting sports meeting at the Potala Palace in Lhasa, Tibet autonomous region, on Nov 13, 2019. [Photo/Chinanews.com]