Lu Ning spent a lot of money to buy tens of thousands of books and several craftsmen from overseas to Jinyang, which also made Ma Jun's talents more comprehensive and his technical level greatly promote. In particular, construction, bridges, smelting, forging, papermaking, textiles, urban sewage discharge systems, etc., has played an unprecedented improvement, and technological progress is changing with each passing day. Various small inventions and small creations are like mushrooms after a rain.

Through more than ten years of development, although Lu Ning developed gunpowder, its power was not very high at first, as the refining level of nitrate, sulfur and other refinements gradually increased, the power of gunpowder has also increased year by year. This has helped a lot in building roads under the circulation of Lu Ning. Of course, a small part is also used for war and to blow up city walls.

Since returning from overseas, Lu Ning began to organize the work of manipulating artillery. At the beginning, Lu Ning wanted to cast copper cannon barrels. After all, there were too many copper cannons on TV in later movies and TV, which was very powerful. But later, he studied repeatedly with Ma Jun and his masters and felt that since he could smel the steel grade steel plate, he should be able to cast iron cannon barrels directly. It was not so easy to produce seamless steel pipes, which was much more difficult than casting copper cannon barrels.

In fact, Lu Ning didn't understand the research and development of gun barrels, but after all, he was a time traveler from later generations. He had seen gun barrels and other things online and magazines. For anyone in later generations, even if he didn't understand, he could tell a rough idea. Ma Jun and other great craftsmen are indeed great. They work hard to develop based on just a little concept Lu Ning said. From time to time, Lu Ning will come to guide and give some suggestions. Of course, they will do the specific things, of course, Ma Jun and his craftsmen.

Originally, during production, Ma Jun and others developed various tools, and under the guidance of Lu Ning, they also developed a simple lathe. Later, they used hydraulic power as power. Later, after they developed a steam engine, they let the steam engine do the power for mechanical processing. This was a record for this era, and it also allowed the mechanical processing to be born thousands of years ahead of schedule, creating conditions for industrialization within Lu Ning's jurisdiction.

As for the casting of seamless steel pipes, it was much more difficult. Ma Jun and others failed countless times, tried again, and failed again. I don’t know how many things they failed, but finally cast seamless steel pipes. After hearing this, Lu Ning was very excited and immediately ran to the research institute to watch. After watching, Lu Ning was disappointed. This is the kind of seamless steel pipe that Lu Ning had seen in later generations. There are many tiny air holes on the steel pipes, and some places are bumpy. Can this work?

Seeing Lu Ning looking disappointed, Ma Jun quickly asked, "Master, this has been done for countless hours and was also completed in one go. Can't it be used?"

Lu Ning looked up at Ma Jun and his craftsmen. Although he was disappointed, he still smiled and said to them: "It's great that you can make this, but this steel pipe is still not useful. There are tiny air holes on the steel pipe, so it's definitely not good to make cannons. Only when you create seamless steel pipes with no air holes and high-quality quality. Of course, you shouldn't be happy either. Failure is the mother of success. One day we will be able to cast excellent seamless steel pipes."

After hearing this, Ma Jun was also depressed. After working hard for so long, he spent a lot of manpower and material resources still failed. This made Ma Jun, a great scientist, feel very uncomfortable. "Lord, is it because we didn't get it right?"

A great craftsman under Ma Jun was also frustrated after hearing this and said in dissatisfaction: "Lord, we can repair these vents. This is considered to be the bumpy areas, and we have the ability to repair them perfectly."

When Lu Ning heard this, sweat, do you think you are using a toy cannon. If the holes and the potholes on the cannon can be used after repair, why not develop seamless steel pipes? The repaired cannon tube will definitely not withstand the explosion of powerful gunpowder. You don’t know the power of gunpowder when it explodes, but I know very well, especially if it explodes in such a small tube, the situation will be even worse. Maybe it will explode.

Lu Ning understood the mood of Ma Jun and others. After all, this was something they had worked hard to make through countless failures and hundreds of days and nights. But it was not useful after making it out, and it would not feel good if it was left in any of them. "Deheng, you don't have to be discouraged. It is a miracle that you can make such a thing in such a short time! As long as we think more about what methods or raw materials can improve it, it may not take long to make a more perfect steel pipe! As for the method of repairing this steel pipe, it must not work. You all know that the power of explosives is very huge. If you explode in such a small tube, the power is unimaginable. The repaired tube will definitely not be able to bear it, and it may even cause human life."

After listening to it, Ma Jun thought for a while and felt that he had figured out what he had done and was much happier. "Lord, after hearing what you said, I think we might have had a problem with the raw materials of the mold. When we try a few more materials, we should be clear about the reason."

When Lu Ning saw Ma Jun say this, he knew that he had come out of the shadow. It would take no time for Ma Jun and the others to come up with better seamless steel pipes. Ma Jun absolutely believed that Ma Jun only learned some simple physics, mechanical knowledge and simple common sense from Lu Ning. Ma Jun could create so many inventions and creations based on these alone, and that was definitely a genius. Otherwise, no matter how hard it was, ordinary people would not achieve such achievements. Moreover, Ma Jun now has countless great craftsmen, and they have talents from all aspects. This is mainly because Lu Ning took measures to improve and improve the status and treatment of craftsmen. The most powerful craftsmen in the world have basically gathered in the jurisdiction of Jinyang or Lu Ning, and it is also convenient for Ma Jun to find more talents, making Ma Jun's talented people even more.

Lu Ning smiled and looked at Ma Jun and the craftsmen, very satisfied, and said in an excited tone: "Deheng, this seamless steel pipe is really difficult to make, because the molten steel needs to be formed in one go and cannot affect the performance and quality of the steel. This requirement is very high. As long as you work hard, I think you will succeed. You can even make difficult things like steam engines, machine tools, and a thousand pound hammers. You have the ability to make this seamless steel pipe. It is only a matter of time, so don't worry."
Chapter completed!