Summary：Staff members check the wall of Yindongpo Tunnel of Guizhou-Guangxi Railway with the light from torches in Duyun

Staff members check the wall of Yindongpo Tunnel of Guizhou-Guangxi Railway with the light from torches in Duyun City, southwest China's Guizhou Province, Aug. 20, 2018. Railway maintenance workers here patrolled the 8.5-kilometer tunnel and took necessary measures to ensure the safety of railway transportation during the flood season.