After making another long circle and reaching the southernmost factory building, Ling Yang said seriously, "Everything here is very dangerous. I suggest that everyone not touch it."

Ling Yang pointed to a pile of cans nearby and explained, "These are the products sent by the sulfuric acid and nitric acid factories. Some are here, and some are kept in the warehouse for future use. However, we don't yet have the ability to store sulfuric acid and nitric acid for long periods of time, so we have to use these products as soon as they arrive."

"Over there," Ling Yang pointed to the other end of the factory, "workers are dripping glycerin into a mixture of sulfuric acid and nitric acid. You can see that the mixture is placed in a porcelain basin in a stream we dug. The water in the stream is brought down from the mountains and is low in temperature, which helps control the temperature during production. If the workers notice smoke coming out of the porcelain basin while dripping glycerin, it means it's about to explode, so they will sink it directly to the bottom of the water."

"Here, a liquid is produced. This liquid is extremely dangerous and can explode with immense force if not handled with care. The principal personally named this liquid 'nitroglycerin'."

At this point, Lin Hai added, "You may not understand why it takes so much effort to produce this nitroglycerin. Let's go to the test site in the back mountain and take a look, and everyone will understand."

Following the deafening explosion from the back mountain, Lin Hai excitedly applauded and announced on the spot, "Although our technology is still lacking, and the storage and transportation of nitroglycerin still pose significant risks, we must continue to produce it. A sufficient amount of nitroglycerin will not only be used by civilians to support our mines and infrastructure, but will also allow our army to truly threaten fortified cities. Soldiers and militiamen armed only with sabers and light crossbows will no longer have to sigh in despair against towering, sturdy city walls. This is the foundation that will allow us to challenge the great powers of the future."

After that, Lin Hai continued to say to Ling Yang, "Regarding the storage, transportation, and use of nitroglycerin, you and the technicians should conduct a few more experiments and produce a manual. You will also be in charge of the management of the finished products. At this stage, any use of nitroglycerin requires my approval."

Lin Hai looked at the crowd still in shock. Yes, even for those who knew about the project, most of them were witnessing a nitroglycerin explosion for the first time today and were still in shock. Lin Hai said, "Today we have taken the first, and most crucial, step. After that, newer ammonium nitrate explosives are being developed, as are hydropower-driven power generation and storage equipment. You may not understand these things, but you don't need to know the specifics. You just need to understand that with these things and our unity, Qinghe will be unbeatable."

"Yes, I am impossible to be defeated. To be honest, I didn't expect that the bug of \u0027gunpowder is ineffective\u0027 could be bypassed so easily. So no matter who you are, the rules of this world you set have been broken by me. This world will still enter the age of hot weapons, whether you like it or not." Lin Hai thought silently in his heart.