Why did China divert the Yellow River from Jiangsu to the sea in 1952? What is the reason?

China has complete sovereignty over the Bohai Sea. The Yellow River flows into the Bohai Sea, forming an alluvial plain, which gradually reduces the area of the Bohai Sea. The climate regulation of the ocean is incomparable to that of the mainland. If the Bohai Sea is filled up, it will seriously affect the climate environment in North China. If Jiangsu enters the sea and the alluvial land continues to expand to the high seas, the problem of salinization of swamps in northern Jiangsu will be solved.