A villager clears up flotage from Maoyan River in Yongding District of Zhangjiajie City, central China's Hunan Province, Sept. 6, 2020. The city has organized people to regularly clear up flotage on the river to keep the riverway unimpeded. (Photo by Wu Yongbing/Xinhua)

Aerial photo shows villagers clearing up flotage from Maoyan River in Yongding District of Zhangjiajie City, central China's Hunan Province, Sept. 6, 2020. The city has organized people to regularly clear up flotage on the river to keep the riverway unimpeded. (Photo by Wu Yongbing/Xinhua)

Aerial photo shows villagers clearing up flotage from Maoyan River in Yongding District of Zhangjiajie City, central China's Hunan Province, Sept. 6, 2020. The city has organized people to regularly clear up flotage on the river to keep the riverway unimpeded. (Photo by Wu Yongbing/Xinhua)

A villager clears up flotage from Maoyan River in Yongding District of Zhangjiajie City, central China's Hunan Province, Sept. 6, 2020. The city has organized people to regularly clear up flotage on the river to keep the riverway unimpeded. (Photo by Wu Yongbing/Xinhua)

A villager clears up flotage from Maoyan River in Yongding District of Zhangjiajie City, central China's Hunan Province, Sept. 6, 2020. The city has organized people to regularly clear up flotage on the river to keep the riverway unimpeded. (Photo by Wu Yongbing/Xinhua)

A villager clears up flotage from Maoyan River in Yongding District of Zhangjiajie City, central China's Hunan Province, Sept. 6, 2020. The city has organized people to regularly clear up flotage on the river to keep the riverway unimpeded. (Photo by Wu Yongbing/Xinhua)