Traveling through the sword to engage in military industry

Jin City's rental housing is still relatively safe, and Ren Zhong doesn't plan to change his return location, so he directly chooses his apartment complex as the fixed return point. The system happily confirms this time.

After he confirms the fixed return point for the main plane crossing, a new situation appears in the system.

"Bright Sword Crossing System."

Current Time: February 2024, Balizhuang, Jin City.

Return Countdown: 23:59:58.

Points: 17200.

Do you want to choose to return to the fixed location?

Currently available fixed return location: Houshan Cave, Daxiagou, Jinzhong.

No option to return to the last crossing location."

As expected, after the system upgrade, it finally revealed something new: the option to choose a fixed return location.

It's just that the actual crossing address of the fixed location leaving the return point cannot exceed 10 li (5 kilometers) in distance. This function seems impressive, but in reality, it's almost useless at this stage.

Therefore, Ren Zhong quickly stopped researching this thing. In his opinion, the top priority is to resolve the problem of the No. 81 Chemical Factory as soon as possible.

He can't count on Zhao Lidong for this matter. They are all academic scumbags in science subjects like chemistry who choose to study liberal arts. Therefore, Ren Zhong is well aware of his limitations. He searched online for chemistry tutoring and started calling them one by one.

"Mr. Li, I simply want to study some chemical reactions and preparations, but I didn't study high school chemistry well, so I had to study liberal arts. Now I want to make up for these regrets. I feel that studying these chemical reactions is very interesting," Ren Zhong said to the first chemistry teacher he called.

"Mr. Ren, I originally thought I was applying for a tutoring job for high school chemistry experiments. I have never encountered an adult like Mr. Ren learning chemistry experiments before. Perhaps it's not what you expect," Li Subing said after listening to Ren Zhong's idea, almost without hesitation, choosing to refuse. Accompanying an adult to do basic chemical reaction experiments made Li Subing feel unreliable.

Which adult would come to learn and play with this kind of thing?

"Mr. Li, don't rush to refuse. The price I can offer is 600 yuan per class hour. The chemical reactions we study basically don't exceed the scope of high school chemistry, such as sulfuric acid preparation and nitric acid preparation. We use a relatively old chemical distillation method to verify whether it can be achieved and, if so, what kind of efficiency can be improved."

"If you have time, let's chat in person. I'm not kidding. I sincerely want to find a chemistry experiment teacher to help me improve. For the class hours, let's set 30 class hours for the first phase, one class hour per day. I'll drive Mr. Li to a place to do experiments and then drive him back. Pick-up and drop-off are included during the learning period."

Under the conditions offered by Ren Zhong, Li Subing was a little tempted. He is a high school chemistry teacher, but if Ren Zhong's requirements are really some high school experiments, then he might as well give it a try. Anyway, the other party includes pick-up and drop-off. If it doesn't work out, he'll just lose a little time.

"Okay, let's add each other on WeChat and share our location information for easy pick-up."

Li Subing couldn't resist Ren Zhong's monetary offensive and finally agreed.

At a farmhouse courtyard, Ren Zhong and Li Subing quickly appeared here.

Sulfur ore and various beakers and utensils have all been purchased by Ren Zhong.

"Mr. Li, I understand. How about this, we increase the class hour fee to 800. Later, Mr. Li doesn't have to answer any questions on the spot. You can go back and study them and then reply."

In the original historical timeline, the Eighth Route Army's military industry workers already knew that sulfuric acid was the "mother of chemical industry." To manufacture high explosives, the key was to produce sulfuric acid.

Due to the Japanese "mopping-up operations," in February 1939, the Technical Research Society of the Supply Department of the Jizhong Military Region (established in Louti Village, Renqiu County in August 1938) moved from the Jizhong Plain to Gegong Village, Tang County, in the western Taihang Mountains. Here, they successfully produced sulfuric acid using the "laboratory method" with bottles and jars.

However, mass-producing sulfuric acid using the industrial method was by no means easy. Acid-making equipment must be acid-resistant and corrosion-resistant. In the base area with extremely scarce material conditions, finding lead and stainless steel materials became an impossible task. In March 1940, without lead chambers or stainless steel materials, the technicians used their ingenuity and boldly innovated. They successfully trial-produced sulfuric acid in Shennan Town, Wan County, using locally produced pottery jars, creating a new "jar tower method" sulfuric acid production process, achieving a major breakthrough.

On June 30, 1940, after the Eighth Route Army Commander-in-Chief learned that the Jin-Cha-Ji Military Region could industrially produce sulfuric acid and nitric acid, he immediately sent a telegram to the then commander to congratulate him: "You can now manufacture sulfuric acid and nitric acid yourself. This is a major progress in our industrial construction and also the main key to solving industrial construction, especially the military industry. The headquarters has also experimented with self-made sulfuric acid, but it has not been successful. Now the sulfur production area in southeastern Shanxi is occupied by the enemy and there is no source. Self-manufacturing is impossible. The border area produces sulfur and can already manufacture (sulfuric acid). It is hoped that it will be greatly expanded to supply all industrial sectors in North China, first and foremost the needs of the (military) industrial sector. Strengthen and improve the quality..."

In May 1940, after four surveys, the factory site was finally selected in the relatively hidden Da'angou Village (Wangjiazhuang), Tang County. In July, the Da'angou Chemical Factory was officially established. For confidentiality, the chemical factory was called "Vinegar Factory" to the outside world at that time. In the winter of the same year, it was named the First Chemical Factory of the Industry Department of the Jin-Cha-Ji Military Region.

In the early days of the factory, there were only more than 30 people. Under the guidance of the person in charge, Mr. Huang, the works director, Mr. Zang, and the resident technician, Mr. Wei, they worked hard for two months and used indigenous methods to manufacture a set of multi-cylinder connected tower acid-making equipment and acid-steaming equipment, called the "jar tower method" of acid-making, and began to produce while experimenting. By the end of 1940, the acid-making equipment gradually became perfect, and sulfuric acid production entered the right track. Each day and night (at that time, it was a three-shift system) could produce more than 50 jin of concentrated sulfuric acid with a concentration of about 98%.

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With the gradual improvement of production conditions and the continuous improvement of workers' technical level, the chemical factory also manufactured products such as nitric acid and smokeless powder, and the efficiency and output continued to increase. By 1942, the monthly output of nitric acid was 1,000 kg, sulfuric acid was 3,000 kg, and nitrocellulose was 200 kg.

The Da'angou Chemical Factory had extremely poor production conditions and no protective measures, relying entirely on dedication and hard work.

Ren Zhong's chemical factory is preparing to replicate and improve this Da'angou Chemical Factory.

However, Ren Zhong not only needs to replicate it, but also needs to improve it so that the production conditions of this new factory can be greatly improved and the harm to the human body can be reduced. Therefore, Ren Zhong is looking for chemistry tutors to do experiments one by one according to the process he has decomposed and disassembled, and then find improvement methods from them, and solve the problems step by step in the main plane before transplanting them to the Bright Sword plane.

The first chemistry tutor he found, although only a high school chemistry teacher, obviously had far more knowledge of chemistry than Ren Zhong. After reading Ren Zhong's experiment plans one by one, although he felt that the money was not easy to earn, who told Ren Zhong to keep adding money?

From sulfur ore to the final production of concentrated sulfuric acid, it is very challenging for Ren Zhong, but for a chemistry teacher like him, it is only a little troublesome.

Therefore, even though it was the first time he received a private tutoring opportunity that was not test-oriented, Li Subing did it while holding his nose!

After all, earning money is not shameful!