Zhu Jie, vice principle of the No. 2 middle school, arranges new books for students in Bikou Township of Wenxian County, Longnan, northwest China's Gansu province, Aug. 28, 2020. Life of locals returns to normal gradually as people from all walks of life have made their efforts to battle against the aftermath of floods triggered by torrential rains and assist in post-disaster recovery and reconstruction. (Xinhua/Du Zheyu)

Rescuers remove a temporary shelter in Bikou Township of Wenxian County, Longnan, northwest China's Gansu province, Aug. 28, 2020. Life of locals returns to normal gradually as people from all walks of life have made their efforts to battle against the aftermath of floods triggered by torrential rains and assist in post-disaster recovery and reconstruction. (Xinhua/Du Zheyu)

A medical worker disinfects a street in Bikou Township of Wenxian County, Longnan, northwest China's Gansu province, Aug. 28, 2020. Life of locals returns to normal gradually as people from all walks of life have made their efforts to battle against the aftermath of floods triggered by torrential rains and assist in post-disaster recovery and reconstruction. (Xinhua/Du Zheyu)

Employees clean up toys in a stationery shop in Bikou Township of Wenxian County, Longnan, northwest China's Gansu province, Aug. 28, 2020. Life of locals returns to normal gradually as people from all walks of life have made their efforts to battle against the aftermath of floods triggered by torrential rains and assist in post-disaster recovery and reconstruction. (Xinhua/Du Zheyu)

Medics arrange disinfectant for street disinfection in Bikou Township of Wenxian County, Longnan, northwest China's Gansu province, Aug. 28, 2020. Life of locals returns to normal gradually as people from all walks of life have made their efforts to battle against the aftermath of floods triggered by torrential rains and assist in post-disaster recovery and reconstruction. (Xinhua/Du Zheyu)

Rescuers disassemble a temporary shelter in Bikou Township of Wenxian County, Longnan, northwest China's Gansu province, Aug. 28, 2020. Life of locals returns to normal gradually as people from all walks of life have made their efforts to battle against the aftermath of floods triggered by torrential rains and assist in post-disaster recovery and reconstruction. (Xinhua/Du Zheyu)

Combo photo shows rescuers searching for stranded people along a flooded street on Aug. 18, 2020(up) and local residents walking along the same street on Aug. 28, 2020 (bottom) in Wenxian County, Longnan, northwest China's Gansu province. Life of locals returns to normal gradually as people from all walks of life have made their efforts to battle against the aftermath of floods triggered by torrential rains and assist in post-disaster recovery and reconstruction. (Xinhua/Du Zheyu)

Combo photo shows a street on Aug. 18, 2020(up, taken by mobile phone) and on Aug. 28, 2020 (bottom) respectively in Bikou Township of Wenxian County, Longnan, northwest China's Gansu province. Life of locals returns to normal gradually as people from all walks of life have made their efforts to battle against the aftermath of floods triggered by torrential rains and assist in post-disaster recovery and reconstruction. (Xinhua/Du Zheyu)

Combo photo shows the water level of Bailong River on Aug. 18, 2020(up) and on Aug. 28, 2020 (bottom) respectively in Bikou Township of Wenxian County, Longnan, northwest China's Gansu province. Life of locals returns to normal gradually as people from all walks of life have made their efforts to battle against the aftermath of floods triggered by torrential rains and assist in post-disaster recovery and reconstruction. (Xinhua/Du Zheyu)

Combo aerial photo shows a view of Bikou Township on Aug. 18, 2020(up) and on Aug. 28, 2020 (bottom) respectively in Wenxian County, Longnan, northwest China's Gansu province. Life of locals returns to normal gradually as people from all walks of life have made their efforts to battle against the aftermath of floods triggered by torrential rains and assist in post-disaster recovery and reconstruction. (Xinhua/Du Zheyu)