Aerial photo taken on July 12, 2020 shows the Nankang dike of the Poyang Lake in Lushan City, east China's Jiangxi Province. The Poyang Lake, China's largest freshwater lake located in the eastern province of Jiangxi, saw its water level rise to a record high Saturday midnight, according to the provincial department of water resources. (Xinhua/Peng Zhaozhi)

Staff members watch the water level at the Xingzi hydrological station of the Poyang Lake in east China's Jiangxi Province, July 12, 2020. The Poyang Lake, China's largest freshwater lake located in the eastern province of Jiangxi, saw its water level rise to a record high Saturday midnight, according to the provincial department of water resources. (Xinhua/Peng Zhaozhi)

Aerial photo taken on July 12, 2020 shows the Nankang dike of the Poyang Lake in Lushan City, east China's Jiangxi Province. The Poyang Lake, China's largest freshwater lake located in the eastern province of Jiangxi, saw its water level rise to a record high Saturday midnight, according to the provincial department of water resources. (Xinhua/Peng Zhaozhi)

The water level at the Xingzi hydrological station of the Poyang Lake surpasses its record in 1998 in east China's Jiangxi Province, July 12, 2020. The Poyang Lake, China's largest freshwater lake located in the eastern province of Jiangxi, saw its water level rise to a record high Saturday midnight, according to the provincial department of water resources. (Xinhua/Peng Zhaozhi)

The water level at the Xingzi hydrological station of the Poyang Lake reaches 22.61 meters in east China's Jiangxi Province, July 12, 2020. The Poyang Lake, China's largest freshwater lake located in the eastern province of Jiangxi, saw its water level rise to a record high Saturday midnight, according to the provincial department of water resources. (Xinhua/Peng Zhaozhi)

Staff members prepare to measure the flow velocity by boat at the Xingzi hydrological station of the Poyang Lake in east China's Jiangxi Province, July 12, 2020. The Poyang Lake, China's largest freshwater lake located in the eastern province of Jiangxi, saw its water level rise to a record high Saturday midnight, according to the provincial department of water resources. (Xinhua/Peng Zhaozhi)

Boats are seen on the Poyang Lake in east China's Jiangxi Province, July 12, 2020. The Poyang Lake, China's largest freshwater lake located in the eastern province of Jiangxi, saw its water level rise to a record high Saturday midnight, according to the provincial department of water resources. (Xinhua/Peng Zhaozhi)

Staff members watch the water level at the Xingzi hydrological station of the Poyang Lake in east China's Jiangxi Province, July 12, 2020. The Poyang Lake, China's largest freshwater lake located in the eastern province of Jiangxi, saw its water level rise to a record high Saturday midnight, according to the provincial department of water resources. (Xinhua/Peng Zhaozhi)

Aerial photo taken on July 12, 2020 shows the Nankang dike of the Poyang Lake in Lushan City, east China's Jiangxi Province. The Poyang Lake, China's largest freshwater lake located in the eastern province of Jiangxi, saw its water level rise to a record high Saturday midnight, according to the provincial department of water resources. (Xinhua/Peng Zhaozhi)