At the end of March 1943, Yan'an City, where the brain center of the Yanhuanghong Party was located, ushered in a great development by leaps and bounds (it should be noted that before the great development, the Yanhuanghong Party infiltrated the list of Red Party spies according to the Bald Party provided by Wang Fan and declassified by later generations, monitored, cracked down, and destroyed the layout of the Bald Party's intelligence secret service agencies in the Red Party for more than 10 years, and avoided the leakage of important information such as training, army reorganization, development, and war preparation).

For speeding up the construction of the base area, Wang Fansi thought about it and after comprehensively considering the cost-effective, speed, implementation difficulty and other factors, he developed the Wang construction method: making full use of the storage function of the plane ring, in the hinterland of the Shaanxi-Gansu-Ningbo base area, a major transformation of geographical terrain was carried out. He took Yan'an as the starting point, in the northwest direction far away from the area occupied by the Japanese and the Bald Communists, by taking the horizontal line as the benchmark and the average altitude of the loess high slope as a reference, he collected the entire criss-crossing slopes of different shades to form a large area of flat land. Then, according to the topography, a "dirt road" of 30 kilometers (30,000 meters) was made to connect the major flatlands, and then the small oil refineries, small power plants, small steel mills, and small military factories brought by later generations were put into the first flat land in turn, and the six oil tankers were placed in front of the small refinery, buried with floating soil, and the oil discharge port was set aside. Then place the pipeline between the unloading port and the refinery, so that the workers only need to connect the pipeline to ensure that the interface does not leak oil. After the connection, open the control valve, you can let the oil flow down the pipeline to the refinery (the oil tanker is placed higher than the refinery, using gravitational potential energy, the oil automatically flows down), and after the refinery produces gasoline and oil, the remaining heavy oil is transported to the oil-fired power plant further down to generate electricity, and supply electricity to the steel mill and military factory (leaving enough raw materials such as open-pit iron ore and copper ore near the steel mill).

Wang Fan used the computers, projectors, curtains and other equipment brought by later generations to cooperate with the departments responsible for the protection of the Red Party to set up about 50 screening halls (select cadres who have undergone strict political examination, teach them how to use them, and learn by taking notes: first press the power button, wait for the operation interface to turn on, double-click a certain video file on the desktop, and start the projection). In this way, the army, workers, peasants, and intellectuals in Yan'an were trained by working during the day and watching overseas "movies" over and over again at night, so that they could understand how to operate, maintain, and maintain the tools, equipment, and weapons that were assigned to them. I don't know how to read it twice, I don't know how to read it ten times twice, learn and understand while doing, seize all the time to study, work, and train, emphasizing that "time is the most important resource, and wasting time is the most shameful!" The concept of ".

Materially, the living conditions in Yan'an have been greatly improved, a large number of color steel houses have been built, a number of schools have been established, intellectuals have been organized to educate children of school age in Yan'an, and each intellectuals have a dictionary of simple and traditional fonts (externally it is the Chinese font used by overseas Jinfan companies), teach pinyin (teachers and students learn together), and focus on learning 6000~8000 commonly used words. The use of field hospital equipment, the establishment of the first general hospital in Yan'an, advanced surgical equipment, sufficient medicines, rich catering greatly improved the recuperation environment of the wounded, increased the speed of recovery of the wounded, the Shaanxi, Gansu and Ningbo base areas under the jurisdiction of the county set up health centers, equipped with general physical examination equipment, each village issued the "Barefoot Doctor's Handbook" (thanks to the book "1949 I Come from the Future", let me know this medical book), take turns to send intellectuals to the villages to screen according to the knowledge mentioned in the book, and those who are sick are transferred to the county health center, Serious diseases were sent to Yan'an Hospital for treatment to improve the ability of disease prevention and treatment in rural areas.

In the second flat land, the first small fertilizer factory and small farm tool factory in the base area were built, and the small fertilizer factory mainly produced nitrogen, phosphorus and potassium fertilizer (the most important compound fertilizer in later generations), and used potassium chloride ore powder, phosphate rock, and coal mine as raw materials to synthesize in turn through the production line of later generations. In the later Yanhuang Republic, the annual production of chemical fertilizer exceeded 60 million tons, and the production line brought by Wang Fan was 50,000 tons at full capacity, according to the calculation of 5 kilograms of fertilizer per mu, the maximum fertilizer area was 10 million mu, which was enough for a period of time according to the needs of the land, of course, at the beginning because of unskilled, the output may only be 30~40% of the design capacity. The small farm tool factory mainly produces some farm tools that the people need on a daily basis in the base area. Because during the period of resistance against the Japanese invaders, the steel output of the Yanhuang land dropped sharply from more than 300,000 tons before the war to tens of thousands of tons, and it was mainly concentrated in the military industry of the bald party. However, the steel output of the Japanese is more than 6 million tons, and more than 10 million tons at the peak, so many people in the Yanhuang land use hoes made of wood, and some conditions go to the blacksmith shop to make an iron head. And in the future, as the world's factory, the Yanhuang Republic produced more than 900 million tons of steel a year! From the perspective of productivity alone, without considering economic benefits and environmental pollution (the daily price of raw material iron ore is rising, the steel produced by the economic crisis cannot be sold at a high price, etc.), it fully shows that the speed of the development of social productive forces is increasing geometrically. But in 1943, steel production was equivalent to the strength of the country, and it was still fully explained that it was the backbone of the country.

In the third flat land, the construction of the first pharmaceutical factory in the base area, the introduction of assembly lines, mainly the production of Western-style synthetic drugs, Wang Fan chose this because the retail and wholesale of drugs in later generations, compared with the production cost of Western drugs has a price difference of 10 times, so Wang Fan has passed the patent protection period, is widely produced by major domestic pharmaceutical factories such as aspirin and other Western-style drugs, with reference to the information provided by Alibaba.com, acquired a small pharmaceutical factory located in a third-tier city, and dismissed assembly line employees. The production line that has been running in smoothly has been moved from the main plane, and the original pharmaceutical factory retains raw material procurement personnel to facilitate the large-scale procurement of raw materials from the main plane. Because it is fully automatic, push-button operation, and there is a demonstration video, the base only needs to pay attention to the control of sanitary conditions to mass production. As a result, in later generations, a box of Western medicine (24 tablets) of about 15 yuan, its production cost was only about a few cents (not counting labor costs and machine depreciation costs, because during the Anti-Japanese War, the base area implemented a material rationing system, and there was no concept of wages), in addition to the production of medicines, a large number of medical cotton and bandages and other external medical consumables.

Considering that there is only one airfield in Yan'an and there is not enough ground for the whole army, Wang Fan took out a piece of the remaining flat land as a future airfield, found two soldiers of the Eighth Route Army with driving experience, drove a road roller and a bulldozer, and paved and compacted the asphalt transported by later generations, so that, with the addition of Yan'an Airport, the Yanhuanghong Party has two airports. Radars have been erected around the airport, antiaircraft artillery positions have been opened, and the personnel on duty at the airport are equipped with a number of individual versions of shoulder-fired surface-to-air missiles at an altitude of 2,000 meters and a firing distance of 8 kilometers, forming a defense force at high and low altitudes around the airport. As for the last few open spaces, they were temporarily used as training bases for armored divisions and motorized divisions.

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