At 17:00 on December 4, 2020, Chongqing city Yongchuan District closed down for more than two months Hangshuidong Coal Mine Carbon monoxide exceeds the limit due to the removal of downhole equipment by the enterprise accident 24 people were trapped underground. accident Emergency rescue of national tunnel after occurrence Chongqing The national mine emergency rescue team and the surrounding professional rescue teams went to the site for reinforcement. Inoue details 