If the amount of gunpowder produced is not very large, you can use glue or egg white to stir these three things well, just like stirring concrete, and when the glue or egg white is dry, it will become a grain of black powder.

However, Li Hao has no glue now, and he is even more reluctant to use egg whites to make gunpowder, so he can only boil it in a pot, put a large pot on the stove, pour in three raw materials, add water, and then stir constantly, and when the water is slowly boiled dry and becomes a viscous paste, stop the fire.

Next, pour the paste onto a wooden board and let it dry in the sun, and that's it.

Although boiling gunpowder is a bit dangerous, there is basically no problem if you are careful, Li Hao personally carried out the operation of boiling gunpowder, worked hard for a long time, and finally boiled a large pot of paste out, and then poured it on the wooden board to dry.

Now that Tingzhou has entered early summer, the sun is very fierce, only until ten in the evening, and the gunpowder has been dried, Li Hao hurriedly used a large jar to collect all the gunpowder, and took out the small crockpots that he had prepared a long time ago.

The crockpots he ordered were spherical, about the size of dragon fruit, but because the walls of the jars were too thick, the space inside was not very large, about the size of a baseball.

The next step is to load gunpowder, the five beauties want to help, Li Hao doesn't allow it, he drove them all out of the inner courtyard, what are you kidding, this step is very dangerous, how can you let them help, he almost didn't think about it at the time, since it was dangerous, why did he have to do it himself.

The chemical equation of gunpowder combustion is potassium nitrate plus sulfur plus carbon and oxygen combustion, which produces a large amount of nitrogen and carbon dioxide and potassium sulfide, among which nitrogen and carbon dioxide are the key to the explosion.

That's right, it is a gas explosion, the amount of nitrogen and carbon dioxide produced when gunpowder is burned is very large, if a large amount of gas is produced in a small space, it will generate huge pressure, and when the pressure breaks through the space, it will produce an explosion, which is actually the same as the explosion of car tires.

Since you need a small space, you have to pestle the gunpowder in a clay pot without worrying about oxygen, which is absolutely enough.

Li Hao carefully picked up a small clay pot the size of an apple, this is a test clay pot he specially made, it is to see the power of the explosion, fill this small clay pot with gunpowder, bury the lead, the lead is very easy to do, as long as a thin layer of gunpowder powder is sprinkled on the toilet paper, and then rolled up and rolled into a paper rope, it is the lead, he has tried, when it burns up, it sneers, and the effect of the artillery lead is almost the same.

Holding an apple-sized test bomb, Li Hao was a little apprehensive, although he had tried to make a bomb before, and it was successful, but he was still a novice after all, and he didn't know if it would work this time, if it failed, it would be bad.

In the middle of the night, Li Hao took Lu Yun and his special combat team out of the city quietly, came to a small hillside more than ten miles north of the city, and then took out the apple-sized bomb, and said to all the special combat members: "This is my new big killing weapon, I don't know if it has succeeded, you will see it later, if it succeeds, it will definitely refresh your world view." ”

Although they didn't know what it meant to refresh their worldview, they all nodded yes.

Li Hao took out the lighter, lit the bomb fuse, and then threw it violently, the clay pot flew more than 30 meters away, and it was not broken after landing, and the thick-walled clay pot was really useful.

After the crockpot fell to the ground, Li Hao was silent in his heart for a few seconds, and suddenly there was a loud "boom", like a thunderstorm, accompanied by a burst of firelight, fleeting, like lightning, which frightened everyone to exclaim.

Under the moonlight, I saw white smoke wafting, and Li Hao said: "It's successful, go and see." As he spoke, he walked to the explosion site first.

When he came to the explosion point, he saw that a small crater with a diameter of more than 30 centimeters was blown up on the ground, Li Hao nodded with satisfaction, the bomb just now seemed to be the size of an apple, but in fact, the internal space was smaller than an egg, and such a small bomb could have such a great power, and the effect was quite good.

Feiying looked at the pit on the ground in disbelief, couldn't believe his eyes, looked at Li Hao in shock, and asked, "Master, what was that thing you just thrown, and why can you summon the divine thunder in the sky?" ”

"Divine thunder?" Li Hao was stunned when he heard this, and then smiled bitterly, the ancients were like this, once they discovered the phenomenon beyond human power, they related it to the gods, so this world has the theory of ghosts and gods, until the future world of high-tech popularization, there are still people who believe in ghosts and gods.

In fact, this is also a kind of wish and hope of people, because people are always greedy for life and evil (wu) death, if there are really ghosts in the world, then they can exist in another form after death, so many people choose to believe in ghosts and gods.

Li Hao has never believed in ghosts and gods, and even his own crossing can be explained purely from physics, he wanted to take this opportunity to teach this group of special forces a good lesson, let them know that there are no miracles in this world at all, and thunder and lightning are just a natural phenomenon.

But he gave up in the end, because he was too lazy, and it was too much trouble and too much to explain to them, and he had to find the perfect word for the bomb.

So he said: "This thing is called thunder, it is extremely powerful, it was taught to me by an old fairy in a dream when I was sleeping and dreaming, you must keep your mouth shut, and you must not reveal it." ”

"Yes!" All the special forces commanded in unison, and their expressions were extremely solemn.

Li Hao said again: "I have already shown how to use it again, it is very simple, use fire to ignite the fuse, and then throw it out, and then it will explode, which can kill and injure the people around you, and the most important thing is that this kind of thing can effectively create chaos, and it is quite effective in war." ”

Everyone nodded, and a young special soldier who was only fifteen years old suddenly asked curiously: "Master, what will happen if you don't throw it out after lighting the fuse?" ”

Li Hao raised his eyebrows and said, "Then you will be blown up so that there will be no bones left." ”

The special soldier was taken aback when he heard this, and shrank his head, secretly feeling terror.

Next, Li Hao took them back to the city, and he returned to the inner courtyard to fill the gunpowder himself, and soon, more than eighty bombs were successfully made, to be honest, eighty is too little, if it is eight hundred, it is estimated that it can be somewhat useful, eighty is really difficult to reverse the tide of the war, at most it can only surprise the enemy and delay a little time.

After another seven days, Li Yuanzhong and Wang Yuantai came to Li Hao again, and offered some realgar and saltpeter, this time they found fewer materials, realgar is only ten catties, saltpeter is only more than fifty catties, Li Hao sighed helplessly, let them not look for it, these days, these two people are indeed too tired, he can't bear to toss them anymore, besides, realgar and saltpeter are too few in a border place like Tingzhou.

Li Hao sent the two of them back to rest, and he processed these sulfur and saltpeter, continued to make gunpowder, and then made them into thunderstorms, and now there are one hundred and eight thunderstorms, which is an auspicious number.

Next, Li Hao began to think about how to use these thunderbolts to create magical effects.

After the concerted efforts of the people, the city wall was finally repaired successfully, and now the city wall is more than six meters high, and after adding seven feet to the height, the feeling is really different.

The city wall was repaired, which was originally a happy thing, but Qin Wei told him that the five hundred stone grain in the state warehouse was now three hundred stone, and this group of people was too good to eat, and there was no way to do it, doing that kind of heavy physical work, the consumption was very large, and the food was naturally more, and the people didn't even want wages, could Li Hao still make the family hungry and work.

Worried about the food matter again, Li Hao felt that his head was about to explode, and just when he was upset, Wang Yuantai suddenly came in and arched his hand: "My lord, a person who claims to be called Fan Shui came to the Assassin's Mansion just now, and asked the humble position to present this letter to your lordship." ”

"Fan Shui?" Li Hao was stunned for a moment, and then thought of the beautiful and powerful Western Turkic female man Xiao Di, hurriedly got up and took the letter, tore open the envelope, and couldn't wait to look at it.

There was only one line on the letterhead: "Gaochang borrowed 50,000 troops from the Western Turks, and asked for more blessings for himself, and the two did not owe each other from then on." - Little Di. ”

Li Hao froze there suddenly, his eyes were dull, his mouth was slightly open, and he didn't notice that the letter paper had fallen from his hand, as if he had fallen into an evil spirit.

"My lord? What's wrong? Wang Yuantai asked curiously, he wanted to go up and pick up the letter to see, but he didn't dare.

Li Hao sat down on his chair as if he had lost his soul, and muttered after a while: "Gaochang borrowed 50,000 soldiers and horses from the Western Turks, and Tingzhou ...... Danger. ”