A worker operates an excavator to dig a channel between a flood storage area and the Jiangkou River in Feixi County of Hefei, east China's Anhui Province, July 26, 2020. A flood storage area near the Jiangkou River in Feixi County was put to use on Sunday, as the water level in the nearby Chaohu Lake remained high. Residents being affected due to the flood storage had already been evacuated. (Xinhua/Li Xin)

Aerial photo shows water from the Jiangkou River being diverted to a flood storage area in Feixi County of Hefei, east China's Anhui Province, July 26, 2020. A flood storage area near the Jiangkou River in Feixi County was put to use on Sunday, as the water level in the nearby Chaohu Lake remained high. Residents being affected due to the flood storage had already been evacuated. (Xinhua/Zhou Mu)

A worker operates an excavator to dig a channel between a flood storage area and the Jiangkou River in Feixi County of Hefei, east China's Anhui Province, July 26, 2020. A flood storage area near the Jiangkou River in Feixi County was put to use on Sunday, as the water level in the nearby Chaohu Lake remained high. Residents being affected due to the flood storage had already been evacuated. (Xinhua/Zhou Mu)

A worker operates an excavator to dig a channel between a flood storage area and the Jiangkou River in Feixi County of Hefei, east China's Anhui Province, July 26, 2020. A flood storage area near the Jiangkou River in Feixi County was put to use on Sunday, as the water level in the nearby Chaohu Lake remained high. Residents being affected due to the flood storage had already been evacuated. (Xinhua/Zhou Mu)

Aerial photo shows workers digging a channel between a flood storage area and the Jiangkou River in Feixi County of Hefei, east China's Anhui Province, July 26, 2020. A flood storage area near the Jiangkou River in Feixi County was put to use on Sunday, as the water level in the nearby Chaohu Lake remained high. Residents being affected due to the flood storage had already been evacuated. (Xinhua/Liu Junxi)

Aerial photo shows workers digging a channel between a flood storage area and the Jiangkou River in Feixi County of Hefei, east China's Anhui Province, July 26, 2020. A flood storage area near the Jiangkou River in Feixi County was put to use on Sunday, as the water level in the nearby Chaohu Lake remained high. Residents being affected due to the flood storage had already been evacuated. (Xinhua/Liu Junxi)