Aerial photo taken on Sept. 27, 2020 shows the Songzao coal mine in southwest China's Chongqing Municipality. A total of 17 people were trapped in the coal mine due to excessive level of carbon monoxide in Chongqing, local authorities said Sunday. The accident occurred at the Songzao coal mine, which belongs to a local energy company, in Qijiang District early Sunday morning, according to the district government. (Xinhua/Huang Wei)
