In fact, there is no shortage of water in North China, but there is a shortage of grain in the south. Data show that about 70% of the water used in north China is used for arable land, while the overall grain self-sufficiency rate in the south is close to that of Africa, and the huge gap is mainly

In fact, there is no shortage of water in North China, but there is a shortage of grain in the south. Data show that about 70% of the water used in North China is used for arable land, while the overall grain self-sufficiency rate in the south is close to That of Africa, and the huge gap mainly relies on the northern grain subsidies and a small amount of foreign imports to ensure the basic survival of the south. For example, shandong, Hebei, Henan, Subei, northern Anhui, has been able to feed 200-300 million more people outside the entire north China, and if north China only guarantees self-sufficiency, there will be no shortage of water.