"Swish~" As a stream of white smoke exploded in the stove, the charcoal inside was immediately ignited, and it was burning very vigorously, but the white smoke was very choking. Zhang Zong was also very familiar with this smell. When he was a child, the smell of gunpowder was everywhere on the streets when he set off firecrackers during the Chinese New Year.

"What do you think, Mr. Zhang?" Sun Simiao asked Zhang Zong quite complacently. He just used the sulphur of fire that he invented, which can not only be used for ignition and elixir, but also treat some special drugs.

"It's very interesting, but its power is still too small." Zhang Zong shook his head at this time and said. Although the name is different, the sulphur of the fire in Sun Simiao's mouth is actually gunpowder, which is just one of the by-products of Taoist alchemy. Moreover, Taoism mainly studies gunpowder by using the stadium to refine alchemy, not to kill people, so it is not very powerful.

"Power? This thing is just for alchemy. What power does it need?" Sun Simiao asked with a puzzled expression when he heard this. He talked to Zhang Zong about the sulphur used for alchemy. As a result, Zhang Zong was also very interested and insisted on visiting it with his own eyes, so he demonstrated it, but he didn't expect that Zhang Zong would come to such a strange conclusion after reading it.

"This..." Zhang Zong also pondered for a moment, then smiled, "Master Sun, I actually know a formula for sulphurs of fire. Why don't I demonstrate how?"

"Now?" Sun Simiao asked again in surprise when he heard Zhang Zong's words. His method of making fire-sulphur brimstone was very complicated and even took a long time to prepare, and it was definitely not something that could be done in a short time.

"Don't worry, Taoist priest, it won't take much time!" Zhang Zong smiled confidently and said. This is Sun Simiao's alchemy room. All kinds of materials are very complete, and the production of gunpowder is not complicated. It's just a mix of three materials, so it can be made in a short time.

Sun Simiao was even more surprised when he heard Zhang Zong's answer, and nodded immediately to agree. Then Zhang Zong took out sulfur, saltpeter and charcoal, crushed them separately, mixed them in proportion to gunpowder, and obtained a bowl of black brown gunpowder. Then he sent it to Sun Simiao and said, "Okay, this is the sulphur I made, but I would rather call it gunpowder."

"So fast!" Sun Simiao saw that Zhang Zong had just simply mixed the three materials, and immediately said with disbelief.

Zhang Zong did not explain, but asked Sun Simiao for a bamboo tube, and a small hole was opened at one end, then poured the gunpowder into it, then made a twist of medicine, stuffed it into the bamboo tube and blocked the small hole, and a simple firecracker was made, but this was a real firecracker, far from comparable to the firecrackers that the Tang people stuffed sulfur into the bamboo.

"Master Sun, let's go to the yard to try the power of this gunpowder!" Zhang Zong weighed the huge firecracker with a very large portion and said with a smile.

Sun Simiao was also very curious about what Zhang Zong said about gunpowder, so he nodded immediately and agreed. So the two of them came to the yard together. There was a large stone in the corner of the wall. It should be the only one left in the wall that had been built before. There was a gap of palm-wide on the stone. So Zhang Zong stuffed the firecrackers into the crack of the stone and lit the medicine twist.

As the medicine twist made a "hissing" burning sound, Zhang Zong immediately turned around and ran away, and did not forget to pull Sun Simiao up. The two of them hid under the eaves, and Zhang Zong signaled the other party to cover their ears.

Although Sun Simiao was not sure about this, he still covered his ears like Zhang Zong. As a result, he heard a loud "boom". Even though Sun Simiao had already covered his ears, he was still scared and shivered. After all, the sound was like a thunder explosion. People who don’t know would even suspect that they were struck by lightning.

After the loud bang, the splashing gravel fell all over the ground. Zhang Zong walked forward, but he saw that the big rock in the corner of the wall had broken into two halves along the crack, and the explosion was blown out of a pit as big as a bowl.

Zhang Zong was not satisfied with the power of the explosion, but this power was actually good. Although his gunpowder ratio was fine, the sulfur and saltpeter in Sun Simiao had not been purified, and the impurities inside also affected the power of the gunpowder, so it was already quite good to produce such an effect.

"This... this thing can actually break mountains and crack stones!" Sun Simiao walked forward with a shocked look at this time and said incredible. He now doubted whether Zhang Zong's gunpowder and his own fire-sulphur were the same thing? Their power was too different.

"Actually, this is the real use of gunpowder!" Zhang Zong also said with some emotion at this time.

The original intention of the invention of gunpowder was originally just to refine alchemy, while the practice of alchemy was later used by Taoism to pursue immortality. However, as the formula of gunpowder became closer to the best proportion, its power finally attracted people's attention, and it was naturally used on the battlefield. With the use of gunpowder, human wars also entered the age of cold weapons to the age of hot weapons, and the efficiency of human beings' killing each other has been greatly improved countless times.

From the tools to pursue immortality to countless powerful tools to kill people, the role of gunpowder has been developed to the extreme, but it is a bit ironic no matter how you think about it. Human beings pursue immortality and cannot be obtained, so they can only use it to kill similar people. Later generations have invented countless more efficient methods of killing, and even destroyed the entire earth. That kind of irony is close to a kind of reality black humor.

"If such a powerful power is used to kill people, the consequences..." Sun Simiao couldn't help but have a cold war when he said this. He was a doctor and had only thought about how to save people all his life, but now this gunpowder is the advantage of killing people, which made him feel a strong sense of fear.

"Yes, gunpowder is actually born for war. If it is used on the battlefield, it can even defeat the strong with the weak and defeat the more with the few, thereby completely reversing the outcome of a war." Zhang Zong said very seriously.

In fact, when he was creating nitrifying glycerin, Zhang Zong thought about whether to get out gunpowder. With this thing, it would definitely make the Tang army more powerful and sweep across Tubo, and the Western Regions would not be a problem.

However, after thinking about it for a while, Zhang Zong finally decided not to take out the gunpowder for the time being. The main reason is that the Tang Dynasty is in its military prosperity and there is no strength around it. A mere Tubo is almost destroyed, so even if there is gunpowder, it is not very useful. If the formula of gunpowder is leaked, it will weaken the Tang army's advantages.

In addition, Zhang Zong also wanted to keep a trump card for himself. Although he now weaves a safety net for himself, in this imperial society, everyone's life and death are in the hands of the emperor, which makes Zhang Zong always feel unsafe, so leaving a few trump cards may help him save his life at a critical moment.
Chapter completed!