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When was the Yellow River restored to its former course after the 1938 diversion?
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Yellow River
The Yellow River (Huang He) basin and the Yangtze River (Chang Jiang) basin and their drainage networks.
The Yellow River was restored to its former northern course in 1947.1
This followed the 1938 diversion, during which Chinese Nationalist forces deliberately destroyed dikes near Zhengzhou to impede the advance of invading Japanese troops during the Sino-Japanese War. The dikes were subsequently rebuilt between 1946 and 1947, allowing the river to be rediverted to its previous path, where it once again empties into the Bo Hai.21