Egrets are pictured in Fenhe River in Taiyuan, north China's Shanxi Province, Jan. 3, 2024. As the second-largest tributary of the Yellow River, Fenhe River stretches over 710 km, feeding a quarter of the population of Shanxi, thus known as the "mother river" of Shanxi.(Photo: Xinhua)

An egret forages in Fenhe River in Taiyuan, north China's Shanxi Province, Jan. 3, 2024. As the second-largest tributary of the Yellow River, Fenhe River stretches over 710 km, feeding a quarter of the population of Shanxi, thus known as the "mother river" of Shanxi.(Photo: Xinhua)

Egrets are pictured in Fenhe River in Taiyuan, north China's Shanxi Province, Jan. 3, 2024. As the second-largest tributary of the Yellow River, Fenhe River stretches over 710 km, feeding a quarter of the population of Shanxi, thus known as the "mother river" of Shanxi.(Photo: Xinhua)

Egrets are pictured in Fenhe River in Taiyuan, north China's Shanxi Province, Jan. 3, 2024. As the second-largest tributary of the Yellow River, Fenhe River stretches over 710 km, feeding a quarter of the population of Shanxi, thus known as the "mother river" of Shanxi.(Photo: Xinhua)