After Ni Yuanlu returned to Shanglin Yuanyuan, he locked himself in a small courtyard, which is located on a small hillside, compared with the general courtyard, in addition to having a house, a courtyard and a wall, there is also an extra hurdle more than one zhang high, which Ni Yuanlu deliberately asked people to dig the gentle slope into a steep ridge. He was originally engaged in research at the mouth of the two rivers by the Daling River and served as a supervisor, who knew that there was an explosion at the mouth of the two rivers and injured people and destroyed the wall, and the rumors spread that the fire was brought by Ni Yuanlu for his own reasons, which made Ni Yuanlu very angry but helpless, and now in Shanglin Yuan, it is the meaning of the apocalypse to let him go to this place to do things and hide quietly.

This Shanglin Garden from the name to the purpose of construction is modeled after the Han Dynasty, the emperor of the Yuan Dynasty in order to avoid sitting on the country for a long time can not ride a horse, asked people to raise some birds and rabbits on the edge of Beijing to hunt him. Originally, if you want to hunt, you should go to the deep mountains and old forests to fight tigers, bears, leopards and other fierce beasts, but the emperor of the Yuan Dynasty also knew that people were afraid of him but the beasts did not necessarily buy his account, and he was afraid that he would not fight the tiger but would become a snack for the tiger, so he ordered to raise rabbits and birds to have a good time. Who knew that after a few arrows, he found that he couldn't even put rabbits and birds on the table, so he had to change to pigs, sheep, deer, chickens, etc., which were slow and docile to let him find a feeling.

Zhu Yuanzhang overthrew the Yuan Dynasty and established the Ming Dynasty, and later his son Zhu Di lived in Beijing. He had beaten his nephew and the Mongols, but he didn't like hunting, and after Shanglin Yuan came to his hands, he also raised some birds and beasts, but the fate of these birds and beasts changed from shooting in the middle to raising and slaughtering. Shanglin Yuan passed on, and slowly began to grow crops for the palace, it is said that it is afraid that the rice, noodles, meat and vegetables outside are poisonous, even if the poison does not die, let the little prince and the little princess eat and run the stomach diarrhea is also a capital crime.

After Tianqi came to power, he slowly discovered that the people who prepared food for him such as Shanglin Yuan and Guanglu Temple were basically moths, and they made a lot of money under the guise of comprador vegetables and fruits in the palace. Tianqi didn't make a noise, but asked Xu Guangqi to plan half of it and let Zhao lead the way to repair a new type of farm, and the construction of the new farm itself is an experiment of the doctoral college, and after it is repaired, some people can be placed in it. Zhao Shujiao later repaired the other half of Shanglin Yuan, and after they withdrew to the canal to take root, half of the Huangzhuang was empty, and now the apocalypse has set up a new base for Ni Yuanlu to study armaments.

In order to facilitate the promotion of the new type of farm, a Taoist temple, a temple and a church were built on the hillside outside the residential area. In order to avoid injuring people due to the explosion, Ni Yuanlu moved the test supplies and personnel to these three places, and the other houses were given to people who had nowhere to settle down in the doctoral college, which solved their worries and allowed them to concentrate on research and study.

After Ni Yuanlu returned from the city, he often sat in this courtyard with steep ridges for half a day, thinking about one thing, how could the gunpowder at the mouth of the two rivers explode. Normally, it is necessary to use fire to ignite the explosion of gunpowder through a fuse mixed with powder, but it is reported that no one ignited the explosion at the mouth of the two rivers that day, because there was not even a person to light a torch during the day, but the wooden box containing gunpowder fell from the city wall and exploded. The investigator explained that the reason why the powder box was transferred to the city wall was because there were many soldiers at the mouth of the two rivers who were afraid that they would accidentally touch it, so they moved it from the city wall.

Ni Yuanlu's purpose in asking people to dig a steep ridge at the edge of the courtyard was to replicate the explosion at the mouth of the two rivers, the height of the steep ridge was about the same as the height of the city wall at the mouth of the two rivers, and after thinking for a while, he asked someone to take a box full of gunpowder and throw it under the steep ridge, but only heard a muffled sound and did not see an explosion. Seeing that there was no big movement after throwing it several times, Ni Yuanlu's heart moved, and he remembered that the corners of the gunpowder box at the mouth of the two rivers were wrapped with iron edges to prevent it from being easily damaged, so he ordered someone to find a few iron bars to nail to the corners of the empty box, and then asked someone to load the gunpowder, cover it tightly, and continue to throw the powder box.

After changing the box with iron bars, it still couldn't be lost, Ni Yuanlu shook his head and signaled to stop, and then sat aside and thought about it, at this moment a voice said, "What is Uncle Ni thinking?" Are you thinking about your aunt at home? I heard that Uncle Ni was playing with his little nephew in the house and was going to have some fun, who knew that Uncle Ni was playing with lost bags like a little girl. It's just that another little girl is playing with throwing sandbags, and Uncle Ni is playing with throwing gunpowder bags, it seems that Uncle Ni's courage is not ordinary! ”

Ni Yuanlu looked up and said, "It turned out to be Sangui, why did you think of me coming here today?" Sit down first. After speaking, he motioned for someone to bring a bowl of tea.

Ni Yuanlu called Sangui, this person's surname Wu is the son of Wu Xiang, the deputy general of the Northeast Military Region, and the 7,000 cavalry under Wu Xiang is the only cavalry under Yuan Chonghuan, responsible for the defense of the border wall around Ningyuan Pass, which is quite valued by Yuan Chonghuan. Three years ago, during the Battle of Ningyuan, Wu Xiang was still a military training division, and Ni Yuanlu was protected by Wu Xiang when he experienced life in Ningyuan, and a friendship was formed between the two. Later, knowing that Ni Yuanlu had a connection with the Bo College in the Armaments Department, Wu Xiang let his son go to the Bo College to study, and now Ni Yuanlu is doing research in Shanglin Yuan and needs someone to transfer Wu Sangui by the way.

Wu Sangui is a person who is very good at talking and observing, he saw that Ni Yuanlu had a good impression of him and won the trust of the emperor, so he often came to pat some little pompon farts and offer some little courtesy, and his mouth was even more uncle-uncle-short, which made Ni Yuanlu very useful. Originally, Ni Yuanlu's courtyard was heavily guarded, and ordinary people couldn't enter without notification, but after a long time, Ni Yuanlu also ordered the guards Wu Sangui to come and let him go directly, and Wu Sangui also felt Ni Yuanlu's trust in him, so he got closer.

Wu Sangui saw Ni Yuanlu asking him what he was doing, sat down lightly, then smiled and said: "The little nephew heard that Uncle Ni was doing research in the room, and thought that he should come to help you. There is also one thing that Uncle Ni once told his little nephew before going to the city, that is, someone from the Bo Academy was testing the cannon smashing the iron armor on Juehua Island, and Uncle Ni said at the time that this matter should have been let for you to come, but because you have other things here, it was handed over to others. The little nephew went home and thought about it for a few days, and found that there was a big flaw in it, and he also came up with a way to solve it. ”

Ni Yuanlu said: "I have no time to do a clone because I want to study the grenade to make it more powerful, and now the emperor has asked me to stop making grenades, so I can't study it, you said that you found a flaw in the cannonball smashing the iron armor and came up with a way, what did you find?" ”

Wu Sangui said: "The little nephew heard my father talk about Uncle Ni's majesty when he used a grenade to kill the enemy in Ningyuan, why didn't the emperor call such a powerful thing a reconstruction?" What a pity! ”

Ni Yuanlu said: "It's because it's powerful and hard to control, so you can't continue to build, and you don't understand the specific reason for returning it, so you still talk about yours." ”

Wu Sangui nodded and said: "The little nephew thinks that it is not good news that this cannonball will smash the iron armor or not, if it is smashed and broken, then this iron armor is useless, if it is not broken, it is not good, because the enemy can't smash our iron armor, and we can't smash the enemy's iron armor." You can't help me, I can't help you, is it interesting to shoot a cannonball at me? ”

Ni Yuanlu thought for a while and said, "The phenomenon you imagined could indeed exist, so what is the solution you came up with?" Make our shells bigger? ”

Wu Sangui shook his head and said: "If we become bigger, the enemy can also become bigger, isn't this lifting a stone to shoot ourselves in the foot?" Besides, the size of the shell is related to the size of the cannon, and if you want to make it bigger, you can't launch it. What I mean by this is to make some special cannon shots that shoot at the enemy, so that we can kill them a lot and the enemy can't return the favor with our shells. ”

Ni Yuanlu said: "What is your special shell?" ”

Wu Sangui said: "It turned out that the little nephew wanted to use Uncle Ni's grenade as a cannonball, but the emperor didn't let him continue to make grenades, so this road was not passed." But the little nephew also has an idea to make some pepper bombs, lime bombs, and shit bombs, and launch them to choke the enemy to death, stink to death, and captivate their eyes. If you use these methods on the shore, I am afraid that it will not have any effect, but on the ship, these things may not be able to do miraculous works! ”

Ni Yuanlu saw that Wu Sangui even used shit in his thoughts, so he smiled and asked, "How old are you this year?" What are your plans for the future, whether you are allowed to prepare for the exam, and whether you will be able to raise people in the future? ”

Wu Sangui shook his head and said: "The little nephew is not that piece of material and does not bother to do that, the little nephew is seventeen years old this year, and is going to take the martial arts examination in two years and then join the army. Uncle Ni suddenly asked if this was not satisfied with my idea? If you feel that the little nephew is wrong, please point it out, and the little nephew will go back and think about a few more. ”

Ni Yuanlu shook his head and said: "Although your suggestion is immature, it can be seen that you have used your heart and brain, but you don't take the road of being admitted to the Jinshi but take the road of the martial minister, there are many taboos, and when the martial minister is not like now, you can't make suggestions like now." ”

Wu Sangui asked in surprise: "Why is this?" ”

Ni Yuanlu said: "The military generals can only contribute, and the civil officials can conspire, this is the rule, if there are military generals who make plans, it is easy to be hated, there was a military general in the Jiajing period who came up with a plan, and the whole family was beheaded, you go home and ask your father, he must know." You must know that military generals kill people to see blood, and civilian officials kill people many times without seeing blood, since you decide to take the path of military ministers, you must control your mouth. ”

Wu Sangui said with a smile: "Thank you Uncle Ni for reminding the little nephew that it is unforgettable, but the little nephew can kill without blood, first cover him with a cloth bag and then stone him to death, or hang him with the bowstring of an iron bow, you can do it without blood." ”

Seeing Wu Sangui, a doll in his teens, talking about killing people like slaughtering chickens, Ni Yuanlu couldn't help but feel a pang in his heart, and after thinking about Wu Sangui's words, a flash of inspiration suddenly flashed in his head, and said, "You said stones and iron bows? I finally know the truth about the explosion! ”