People clean shops and street in Ciqikou ancient town, southwest China's Chongqing Municipality, Aug. 21, 2020. Sanitation workers, volunteers and local residents have started to clean and disinfect the ancient town as floodwater began to recede in Chongqing. (Xinhua/Liu Chan)

Aerial photo taken on Aug. 21, 2020 shows the flood-affected area in Ciqikou ancient town, southwest China's Chongqing Municipality. Sanitation workers, volunteers and local residents have started to clean and disinfect the ancient town as floodwater began to recede in Chongqing. (Xinhua/Liu Chan)

A worker cleans a shop in Ciqikou ancient town, southwest China's Chongqing Municipality, Aug. 21, 2020. Sanitation workers, volunteers and local residents have started to clean and disinfect the ancient town as floodwater began to recede in Chongqing. (Xinhua/Liu Chan)

Staff clean a shop in Ciqikou ancient town, southwest China's Chongqing Municipality, Aug. 21, 2020. Sanitation workers, volunteers and local residents have started to clean and disinfect the ancient town as floodwater began to recede in Chongqing. (Xinhua/Liu Chan)

People clean shops in Ciqikou ancient town, southwest China's Chongqing Municipality, Aug. 21, 2020. Sanitation workers, volunteers and local residents have started to clean and disinfect the ancient town as floodwater began to recede in Chongqing. (Xinhua/Liu Chan)

Residents clean a yard in Ciqikou ancient town, southwest China's Chongqing Municipality, Aug. 21, 2020. Sanitation workers, volunteers and local residents have started to clean and disinfect the ancient town as floodwater began to recede in Chongqing. (Xinhua/Liu Chan)

Aerial photo taken on Aug. 21, 2020 shows the flood-affected area in Ciqikou ancient town, southwest China's Chongqing Municipality. Sanitation workers, volunteers and local residents have started to clean and disinfect the ancient town as floodwater began to recede in Chongqing. (Xinhua/Liu Chan)

Aerial photo taken on Aug. 21, 2020 shows sanitation workers cleaning mud and garbage in Ciqikou ancient town, southwest China's Chongqing Municipality. Sanitation workers, volunteers and local residents have started to clean and disinfect the ancient town as floodwater began to recede in Chongqing. (Xinhua/Liu Chan)

Aerial photo taken on Aug. 21, 2020 shows the flood-affected area in Ciqikou ancient town, southwest China's Chongqing Municipality. Sanitation workers, volunteers and local residents have started to clean and disinfect the ancient town as floodwater began to recede in Chongqing. (Xinhua/Liu Chan)

Aerial photo taken on Aug. 21, 2020 shows people cleaning shops and streets in Ciqikou ancient town, southwest China's Chongqing Municipality. Sanitation workers, volunteers and local residents have started to clean and disinfect the ancient town as floodwater began to recede in Chongqing. (Xinhua/Liu Chan)

Aerial photo taken on Aug. 21, 2020 shows the flood-affected area in Ciqikou ancient town, southwest China's Chongqing Municipality. Sanitation workers, volunteers and local residents have started to clean and disinfect the ancient town as floodwater began to recede in Chongqing. (Xinhua/Liu Chan)