Evacuees stay at a temporary shelter in Bikou Township of Wenxian County, Longnan, northwest China's Gansu Province, Aug. 18, 2020. In the wake of landslides and mountain torrents triggered by torrential rains, many residents in Longnan have been evacuated to temporary shelters set up in safe areas. (Xinhua/Du Zheyu)

Evacuees stay at a temporary shelter in Bikou Township of Wenxian County, Longnan, northwest China's Gansu Province, Aug. 18, 2020. In the wake of landslides and mountain torrents triggered by torrential rains, many residents in Longnan have been evacuated to temporary shelters set up in safe areas. (Xinhua/Du Zheyu)

Evacuees stay at a temporary shelter in Bikou Township of Wenxian County, Longnan, northwest China's Gansu Province, Aug. 18, 2020. In the wake of landslides and mountain torrents triggered by torrential rains, many residents in Longnan have been evacuated to temporary shelters set up in safe areas. (Xinhua/Du Zheyu)

Evacuees stay at a temporary shelter in Bikou Township of Wenxian County, Longnan, northwest China's Gansu Province, Aug. 18, 2020. In the wake of landslides and mountain torrents triggered by torrential rains, many residents in Longnan have been evacuated to temporary shelters set up in safe areas. (Xinhua/Du Zheyu)

Electric utility technicians check on lights and power supply at a temporary shelter in Quanjiawan Village of Wudu District, Longnan, northwest China's Gansu Province, Aug. 18, 2020. In the wake of landslides and mountain torrents triggered by torrential rains, many residents in Longnan have been evacuated to temporary shelters set up in safe areas. (Xinhua/Chen Bin)

Aerial photo taken on Aug. 18, 2020 shows tents at a temporary shelter in Quanjiawan Village of Wudu District, Longnan, northwest China's Gansu Province. In the wake of landslides and mountain torrents triggered by torrential rains, many residents in Longnan have been evacuated to temporary shelters set up in safe areas. (Xinhua/Chen Bin)

Villagers unload daily necessity supplies at a temporary shelter in Quanjiawan Village of Wudu District, Longnan, northwest China's Gansu Province, Aug. 18, 2020. In the wake of landslides and mountain torrents triggered by torrential rains, many residents in Longnan have been evacuated to temporary shelters set up in safe areas. (Xinhua/Chen Bin)

A boy does homework at a temporary shelter in Bikou Township of Wenxian County, Longnan, northwest China's Gansu Province, Aug. 18, 2020. In the wake of landslides and mountain torrents triggered by torrential rains, many residents in Longnan have been evacuated to temporary shelters set up in safe areas. (Xinhua/Du Zheyu)

A villager has dinner at a temporary shelter in Quanjiawan Village of Wudu District, Longnan, northwest China's Gansu Province, Aug. 18, 2020. In the wake of landslides and mountain torrents triggered by torrential rains, many residents in Longnan have been evacuated to temporary shelters set up in safe areas. (Xinhua/Chen Bin)