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. (Xinhua/Liu Xu)
Staff members climb down a stone wall while patrolling the Yindongpo Tunnel of Guizhou-Guangxi Railway 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. (Xinhua/Liu Xu)
Staff members light up torches to patrol the Yindongpo Tunnel of Guizhou-Guangxi Railway 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. (Xinhua/Liu Xu)
Staff members pass a stream of flowing water while patrolling the Yindongpo Tunnel of Guizhou-Guangxi Railway in Duyun City, southwest China's Guizhou Province, Aug. 20, 2018. Railway maintenance workers here patrolled the 8.5-kilometer tu
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. (Xinhua/Liu Xu)
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. (Xinhua/Liu Xu)
Staff members eat lunch in front of the Yindongpo Tunnel of Guizhou-Guangxi Railway 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. (Xinhua/Liu Xu)
Staff members eat lunch in front of the Yindongpo Tunnel of Guizhou-Guangxi Railway 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. (Xinhua/Liu Xu)
Staff members check the wall of Yindongpo Tunnel of Guizhou-Guangxi Railway with 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. (Xinhua/Liu Xu)
