The seemingly inconspicuous bristles have had such a big impact, not to mention important rare metals such as tungsten and rare earths, the United States is rich in mineral resources, and it is a little uncomfortable at the beginning, as long as the mining efforts are increased, the gap can be completely filled after a year at most, but the United States can only ensure that it is enough in terms of these rare metals, and it is impossible to have too much balance to export, so the life of Britain and France can be sad

For China, a big agricultural country, the production of chemical fertilizers and pesticides is extremely important, so it has long been highly valued by Hu Weidong, the development of the chemical fertilizer industry is particularly rapid, the total output in 1940 is close to 1.2 million tons, enough to meet the needs of 80 million acres of grain fields, although it is still far from the day when the country's farmland is used with chemical fertilizers, but it is enough to make the total grain output in 1940 set a new historical record, and the annual output of cotton and other major agricultural products has generally hit a record high.

In addition, the rapid increase in pesticide production and the extensive development of farmland and water conservancy infrastructure throughout the country, coupled with the widespread establishment of cooperatives, are conducive to the organization of disaster prevention and resistance, greatly reducing the impact of natural disasters, and is also one of the important reasons for the bumper agricultural harvest in 1940.

Compared with other years, the development of industry and agriculture in 1940 differed only in quality and quantity, while the construction of large-scale projects was almost a difference between "have" and "nothing". Previously, due to the ongoing war of resistance against Japanese aggression and the unclear situation, the Red Party did not dare to invest too much in the construction of large-scale projects, which included the Yanpanxia Hydropower Station, the Lanxin Railway, and several short-distance railways connecting the mining areas with the central cities in the Central Plains Liberated Area.

However, by 1940, the complete end of the civil war gave the Central People's Government a stable environment and human, financial and material resources for large-scale construction. In addition to the above-mentioned coastal deep-water port and large-scale shipyard, Lanxin Railway, Tibet Highway (which has increased to 4), Yanpanxia Hydropower Station, it also includes the reconstruction and expansion project of Fengman Hydropower Station in Northeast China, Liujiaxia Hydropower Station in the upper reaches of the Yellow River, Baocheng Railway, Chengdu-Kunming Railway, Chengdu-Chongqing Railway, Wuhan Yangtze River Bridge, Sanmenxia Yellow River Bridge, Yellow River Control Project, More than 30 large-scale engineering projects such as the Huai control project.

The amount of manpower, finance, and material resources invested in this effort is rare in human history, and despite all the flaws in the national system, it is undoubtedly a shortcut to China's modernization under the current situation in which China is in ruins and has a weak foundation. And compared with history, China currently has a great advantage, that is, the production of agricultural machinery pesticides and fertilizers has a good foundation. It can greatly improve the labor productivity and agricultural output of agriculture. Therefore, even if a large-scale construction project is carried out, it will not lead to famine because agricultural production will be affected, but will be able to absorb a large number of agricultural labor that has been idle due to the increase in labor productivity.

Of course, it must be stated. Because many projects need to be investigated and approved first. So not all of them started at the same time. Otherwise, even with China's manpower, it will still be a little unbearable when the war in the southwest is still unfinished. Moreover, the Liujiaxia Hydropower Station, the Yellow River Control Project, the Huai Control Project and other water conservancy projects are of great significance to agriculture. Among them, the significance of the Yellow Control Project and the Huai Control Project is particularly huge.

Speaking of the management of the Yellow River, after the founding of the People's Republic of China in history, there has been a detour, obviously as early as the Ming Dynasty, our ancestors have put forward the clever strategy of "harnessing water and flushing sand", but at that time, most of China's hydraulic scientists were superstitious about the views of Soviet experts, rejected the correct opinions of a few sober people, and wrongly suggested that the central government build the Sanmenxia Reservoir, which led to serious silting up of the reservoir and the upstream river, which not only failed to control the sediment problem of the Yellow River, but made the problem more serious, making the comprehensive management of the Yellow River difficult. As for the waste of human and financial resources, it is even more staggering.

And now that Hu Weidong, a traverser, is in charge of the overall situation, he will naturally not make the same mistake again, and the construction of the Sanmenxia Yellow River Bridge is even more impossible. Although the strategy of "water and sand diversion" based on informatization cannot be effectively implemented for the time being because the scientific and technological conditions have not yet been reached, it is still possible to partially achieve "water and sand diversion" through manual coordination, but it is not as convenient as it is under the conditions of informatization, and the effect will definitely be worse. The core of his thinking -- the idea of using the water of the Yellow River to wash away the sand of the Yellow River -- is all the more widely accepted because of Hu Weidong's incomparable prestige in China's scientific and technological circles, so the newly built reservoirs and dams and the Yellow River embankments have followed this idea and have been properly laid out.

However, the construction layout of water conservancy projects is a long-term consideration, and in order to avoid immediate problems, the reinforcement of the old Yellow River embankment cannot be ignored. But the Yellow River is at least drewn, compared to the Hongze Lake, which was formed by silting up downstream and not being able to enter the sea, and the Huai River, which is flooded without a dam to block it, is the biggest scourge in China today.

Because Hongze Lake is the river water silted up on the plain, the area is large and shallow, it is very different from the normal lake, it often dries up in a large area when it is dry, and it is easy to flood when it rains, the common people in the two Huai areas call it "heavy rain disaster, small rain and small disaster, no rain and drought." It is not at all like a natural lake that has the function of regulating the climate and reducing flood and drought disasters, but it makes the people of Lianghuai suffer deeply. In order to eradicate this scourge once and for all, Hu Weidong is determined to wipe it out of the face of the earth once and for all, so that it can open up large tracts of fertile land, which is much more food than the fish in Hongze Lake

At that time, China was poor and backward, and water conservancy construction basically relied entirely on manpower, and the work efficiency was too low, so it was impossible to complete the grand jihua of restoring the ancient Huai River road (Note 1) and emptying Hongze Lake.

Note 1: The ancient river channel has long ceased to exist, and if you want to restore it, you must dig it again, and for a large river like the Huai River, if there is only one main river channel into the sea, you must dig out a wide and deep enough river channel, this amount of engineering is too large for China at that time, far less than the main irrigation canal in northern Jiangsu is divided into multiple channels to discharge the water The scheme is practical, but in terms of the amount of water discharged, it is still a wide and deep main stream The effect is better, and it can also take advantage of shipping. (To be continued......)