Zhou Nan saw that Guo Xingzu had this confidence, so he didn't say much, but instructed: "Be careful when preparing it, this gunpowder is not as good as what you used to prepare, don't let the sparks splash in, remember!" Guo Xingzu agreed again, and then he gave a salute and retired.

Zhou Nan looked up at the sky and sighed, he had no choice but to help the craftsmen of this era improve their skills. With the conditions in the cottage, if you want to create that kind of small artillery, first, there is a lack of raw materials for casting artillery, and then the application scenarios are not wide, and you don't need to capture the city, just defend a cottage, and the effect is not as good as making some small explosives. When gunpowder with explosive power is made, it is made into a fist-sized explosive bag, tied to the shaft of the arrow, and the arrow is used to shoot at the target, blow up the target, and the enemy is terrified, which is enough to suppress all the enemies of this era.

Hahaha! Don't accept the battle! Zhou Nan couldn't help but feel proud.

After two busy days, as soon as the morning dawned, Guo Xingzu came to find Zhou Nan. Gao Yuan went out early, and Zhou Nan was about to eat, brown rice porridge, steamed buns, and pickles. Guo Xingzu saw that Zhou Nan was about to eat, and hesitated whether to say it.

As soon as Zhou Nan saw that it was Guo Xingzu, he put down the dishes and chopsticks and asked, "But it's prepared?" ”

When Guo Xingzu saw the question, he replied: "Exactly." According to the instructions of the owner of the village, a pound was prepared, no more and no less. I was about to invite the owner of Dazhai to watch the test play. ”

Zhou Nan heard that it had been prepared and he didn't eat the meal, so he asked Guo Xingzu to take him to see it. Guo Xingzu wanted to invite Zhou Nan to have dinner before going, but Zhou Nan couldn't listen at all, and he couldn't wait for a moment. Guo Xingzu had to take Zhou Nan to the place where he prepared gunpowder.

Gao Yun overheard the conversation between Zhou Nan and Gao Yuan outside the door that night, and she was not as natural to Zhou Nan as before. It's just that Gao Yun has never seen Zhou Nan so impatient about one thing, building a cottage, building a school, establishing village rules, steaming wine, everything Zhou Nan has planned, and he will start to carry it out. Only just now, as soon as I heard that something was prepared, I couldn't wait for a moment, so I wanted to see it, which made Gao Yun want to see it in her heart, what could make Da Lang so eager. Seeing that Zhou Nan and Guo Xingzu were going out, Gao Yun hurriedly followed secretly.

Zhou Nan first followed Guo Xingzu to the powder room where Guo Xingzu prepared gunpowder. I saw that the inside was different from other places, in this powder room, from the large tables and chairs, countertops, medicine troughs, to the small hammers, grinders, and weighing troughs, all of which were made of solid wood, without iron, sand, not to mention oil lamps and fire sickles. This made Zhou Nan feel a little relieved.

Guo Xingzu took out an oiled paper bag from a wooden box, put it on the table, opened it carefully, revealing the dark and somewhat blue granular powder inside, and said: "This is the gunpowder prepared according to the master of the big village, but it is different from the gunpowder prepared by the small ones in the past, and the small ones in the past were black like mud, not black and blue like dust. ”

Zhou Nan smiled, and Guo Xingzu said: "It is to be like this kind of gunpowder, you will know after the test release." But I thought, 'Can it be the same?' What do you have in there? Asphalt, petroleum, tung oil, pine resin, sesame oil, it is strange that they do not become black mud.

What can be used to test it, Guo Xingzu made a difficulty, the last time he did a thunderstorm, it was just to wrap the gunpowder in paper, tie it tightly with hemp rope on the outside, and then apply grease, and light it with a red-hot iron rod. The effect, of course, lies in the "boom", not the "thunder". But with only such a little gunpowder today, how can it be wrapped in paper and tied tightly? How to use an iron rod to burn?

Zhou Nan saw Guo Xingzu's embarrassment and said, "You can find two porcelain bottles, and you want a thin neck to hold this gunpowder." ”

Guo Xingzu saw that Zhou Nan was as new as new, so he ran out and found two small porcelain bottles with a round belly and a thin neck, Zhou Nan placed one of the porcelain bottles on the table, and used a bamboo spoon filled with gunpowder into the porcelain bottle little by little, just filled with more than half of the porcelain bottles, about half of the gunpowder, Zhou Nan put down the bamboo spoon and asked Guo Xingzu to find two more leads, Guo Xingzu was stunned and asked: "What is a lead?" ”

Zhou Nan was also stunned: Could it be that the gunpowder has been made, and people at this time have not used the habit of using leads? To be honest, Zhou Nan didn't know how to make the lead, even if he explained to Guo Xingzu what the lead was, he couldn't do it now, Zhou Nan had to ask Guo Xingzu to find two long wicks, dipped the wick in gunpowder powder, wrapped a wick with oiled paper, inserted it into the porcelain bottle, let the wick and the gunpowder in the porcelain bottle come into contact, and then first plugged the mouth of the porcelain bottle with a small ball of oiled paper, and finally asked Guo Xingzu to call Shen Ding, let Shen Ding make a wooden stopper than the mouth of the bottle, divide it into two halves, and leave a hole with the thickness of the wick in the middle. Shen Ding didn't ask much, listened to Zhou Nan's request, took a look at the porcelain vase, and turned around and went out. After a while, he took two wooden plugs and brought them in, with a small hole in the middle, just enough to hold the wick.

Zhou Nan took the cork, the cork was separated from the middle, Zhou Nan sandwiched the wick between the two halves of the cork, then put the two halves of the cork together, and then stuffed the cork into the mouth of the porcelain bottle. Such a porcelain bottle bomb is ready.

Zhou Nan asked Guo Xingzu to make another porcelain bottle bomb according to the method he had just done. With these two bombs, Zhou Nan and Guo Xingzu went to the col again.

As soon as he walked not far away, Zhou Nan vaguely saw someone following him, taking advantage of the bend in the mountain road, Zhou Nan suddenly retreated, but saw Gao Yun following them not far away. Seeing that he was discovered by Zhou Nan, Gao Yun simply took a few steps forward and followed. Zhou Nan couldn't help asking, "What's the matter with Sister Yun'er?" ”

Gao Yun was found anyway, so he replied: "The slave family came to see the gunpowder prepared by Brother Guo, what is so powerful." ”

Zhou Nan only said: "It's okay to see, just don't be frightened." Hey. ”

Gao Yun sighed: "What's so strange?!" Just don't make any more trouble with the mountain demons. ”

As the three of them spoke, they came to the place where the thunder was last fired, which was naturally a small mountain col surrounded by rocks. Like a natural stone pit, there are more than 100 steps in radius, and few people come here on weekdays, so you don't have to worry about hurting people by mistake.

Although Zhou Nan instructed Guo Xingzu to prepare gunpowder, Zhou Nan didn't know how powerful this thing was, so he asked Gao Yun to stand behind a stone, he and Guo Xingzu came to the middle of the mountain col, first placed a porcelain bottle on the ground, surrounded by small stones, Zhou Nan asked Guo Xingzu to light a coarse incense, originally Guo Xingzu also had to bring an iron rod over, ready to burn red and ignite the gunpowder, but Zhou Nan stopped it, and the porcelain bottle bomb they made this time did not have a place to burn with a high-temperature iron rod.

Zhou Nan also instructed Guo Xingzu that after lighting the wick with incense, he should quickly run to hide behind a boulder two feet away, and do not stay.

Guo Xingzu nodded, lit the coarse incense first, and saw that Zhou Nan walked behind the stone where Gao Yun was hiding, and then used the coarse incense to light the wick left outside the porcelain bottle.