Li Weijian followed Yan Fengzhen and walked forward quickly, turned the shadow wall and passed the screen door, and then turned the instrument door to enter the courtyard. He looked around and saw that this mansion was a typical three-hall courtyard official residence.

According to the Dashun regulations, such an official position as a squire can be divided into a fifteen-room house. After passing the instrument gate, Yan Weizhen turned it again, and Li Weijian saw that the moon door was open on the side of the west chamber of the second courtyard.

After the moon gate is a small garden, behind which there is a pavilion. Li Weijian followed him into the Xuan, Yan Fengzhen spread his hand, walked quickly to the desk in the study, picked up a piece of paper and said: "Brother Jian'er, come and take a look, this question is quite tricky." ”

Li Weijian took it and saw that a saddle surface was drawn with a pencil, and a section was cut in the middle, and the data were listed on the map to calculate the surface area. Looking at it again, it is actually listed with the heavenly stems and terrestrial branches.

Li Weijian watched it for a long time before he realized that the formula for the stem branch that day was actually calculus. After a long period of conversion in his heart, replacing the sexagenary branch with a familiar symbol, Li Weijian went to the table and took a pencil to rearrange the formula.

"The second son is wrong here, but in fact, he can draw a conclusion by calculating like this."

He wrote very slowly at first, but then it was a little faster, and when he listed the formula, Yan Fengzhen snatched it, muttered in his mouth, pushed down his tortoiseshell glasses, and suddenly patted his thigh: "I see!" Haha, now it's an explanation. ”

Yan Fengzhen threw down the paper and hurriedly beckoned: "Come on, serve tea quickly." Then he looked at Li Weijian: "Brother Jian'er sit down, Brother Jian'er looks at the age and can you have a table?" I don't want to be so young but proficient in this calculus. ”

In the following table the word resurrection. Back to the second son, I can't talk about being proficient, I just can't read the Four Books and Five Classics, and I prefer to study some strange and obscene skills. ”

Yan Fengzhen's face changed, and he said disdainfully: "There are a lot of forgeries in the Four Books and Five Classics, and it is difficult to distinguish between truth and falsehood. In the end, it's just a rotten Confucian! This practical learning is the true way to help the people. ”

At this time, the little servant entered with a tea tray, but Yan Fengzhen came up and grabbed Li Weijian: "Come back to life and come with me." ”

"Huh? Second son......"

"Don't be an outsider, you just call me Jingwen."

As he spoke, he hugged Xia, and when he turned to it, he saw something standing on a wide field. On the right is a chimney nearly a foot high; In the middle is an earthen stove, on which a pot is buckled, and a pipe is connected to a cylinder; On the left side is a swing arm mounted on an iron pillar, with iron cables hanging from both ends, one side connected to a cylinder, and the other side hanging straight into the well.

Li Weijian gasped: "Newkemen steam engine? ”

"Resurrection knows this?" Yan Fengzhen became more and more excited, and beckoned: "Come on, make a fire!" He rubbed his hands and looked at Li Weijian and said: "Yes, it is written on the prayer note that the resurrection comes from Jinling, and Chen Duxian (Note 1) was in charge of Jiangnan ten years ago, and he built a machine like this when it was. ”

Ten years ago, Li Weijian was still in the capital, and he never wore this body, where have he seen it? However, Chen Hongmou was in charge of Jiangnan ten years ago, and Chen Duxian mentioned by Yan Fengzhen should be this person. The new Shoufu actually built a Newcomen steam engine, and this news was extremely useful to Li Weijian.

After thinking about it, Yan Fengzhen couldn't wait for the little guy to manipulate, so he didn't care about getting his hands full of coal ash, so he added coal by himself, and then two more guys came and started a fire after manipulating for a while.

After burning for a long time, Yan Fengzhen saw the hot steaming, and rushed forward to twist the valve: "Resurrect and look!" ”

The cylinder was ventilated, but the swing arm did not move, and the two little guys went over to pull the iron cable, and it took a long time for the swing arm to kowtow and swing back and forth.

Then I saw the iron cable being extracted up and down, and the water in the well gushed out.

"How?"

"Sure enough, this steam engine was made by Brother Jingwen?"

These words scratched Yan Fengzhen's itch, and he rubbed his hands and said reservedly: "It's nothing, I just picked up Chen Shoufu's tooth wisdom." ”

Li Weijian hit the snake with the stick, and hurriedly said: "Brother Jingwen's words are wrong, if it weren't for Brother Jingwen's practical attainments, where would this thing be restored?" If it is an ordinary rotten Confucian, he will put the parts in front of him, but he is afraid that he will scratch his ears and cheeks and not know how to start. ”

Yan Fengzhen smiled reservedly, and then said worriedly: "This thing was made by English craftsmen forty years ago, and time has passed, I am afraid that they have already built a machine that is better than this thing." His Majesty Taizong was prescient, and the Taixi Zhuyi, no matter how big or small the Franc machine and the Netherlands, were not to be feared, but this English was the great enemy! ”

Li Guo also said this? Li Weijian thought about it, why should he look for it when he turned around, and see if there were any quotations from Taizong or anything like that.

Li Weijian echoed and said: "Practical learning, especially technology, is like sailing against the current, and if you don't advance, you will retreat." ”

When Yan Fengzhen heard this, he felt like a confidant. said: "It's okay, that England is just a small island country, and now I am inspirational and new, just wait for my Dashun to catch up, and in less than ten years, I will be able to overpower Yingyi." ”

After a pause, he turned to say: "With the knowledge of resurrection, this time the Beijing Master must be on the list." Speaking of this section, Yan Fengzhen looked around, and said in a low voice: "The day before yesterday, my father sent an edict to His Majesty, saying that the sage intends to open the test after three years. Don't slack off after the resurrection of autumn, there will always be a future for you in the future. ”

Li Weijian hurriedly arched his hand and said, "Thank you Brother Jingwen for mentioning it." ”

Yan Fengzhen shook his head with a smile, looked at the steam engine again, and said, "This thing is good, but the cost is too high." Put off the fire, and if it burns any longer, I won't have any money to buy coal this month. ”

Li Weijian secretly calculated in his heart that the boiler and cylinder were all cast iron riveted, and the connected pipelines were gray cast iron pipes. It can be seen that Dashun mastered the riveting process at this time, and also mastered the seamless iron pipe process.

It's a pity that I can't see Dashun's casting process at this time, otherwise I can speculate whether Dashun has mastered the boring machine technology.

If there really is boring machine technology, then Li Weijian is sure to develop four high-efficiency steam engines that work under standard pressures.

In his previous life, he first studied mechanics, then metallurgical machinery, but after work, he sat in the office. In his spare time, he fiddled with these retro machines and built a three-cylinder steam engine himself.

Yan Fengzhen turned around and led Li Weijian back to the study, and before the two of them sat down, someone came over to report: "Second son, my wife asked the second son to find a well nest to change, this Zhang family's water is somehow bitter recently." ”

Yan Fengzhen stiffened his face and said: "You just went to do such a trivial matter, didn't you see that I was entertaining?" ”

The subordinate only retreated, and Yan Fengzhen said: "I don't know what to say." ”

Li Weijian wondered in his heart and asked, "Brother Jingwen, this capital has a draft...... Still want to buy? ”

Yan Fengzhen said: "Naturally, I want to buy it." Yes, the resurrection is new, and I don't know that it is not easy for Jingshi to draft. Since the Ming Dynasty, thousands of wells have been drilled, but a small number of sweet wells have been removed, and the rest are bitter wells. The water from the bitter well can only be used for laundry. If you want water, you have to buy it from a water shop with a sweet water well. ”

The capital still has to buy water to eat? Li Weijian had a thought in his heart, saying that the first pot of gold should be on this water.

The two talked about the world, and Yan Fengzhen was mostly talking, and Li Weijian only occasionally echoed a few words, but he could always point to the important places, so Yan Fengzhen talked more and felt like a confidant.

He pulled Li Weijian to look at the collection of books, and saw that the bookshelves were stuffed with all kinds of practical books. There are not only the translations of "Geometric Originals", "Jian Pingyi Said", "Taixi Water Method", "Measurement Law", "Lingyan Lispoon", "Measurement Similarities and Differences", "Pythagorean", "Sleeping Answer", etc., as well as the newly translated "Taixi Machinery" and "Calculus".

After Shen, Yan Fengzhen ordered someone to set the meal. However, Yan Xiyao didn't know what he was stumbling up on, and he never returned. After dinner, Yan Fengzhen had to reluctantly send Li Weijian out, and said before leaving: "It's really not a coincidence today, my father may have something to do." When I come back to life in the future, I will introduce me, and I will definitely shock my father! ”

Li Weijian smiled: "Haha, then it's a word." It's cold outside, Brother Jingwen go back quickly, I'm leaving. ”

After receiving the reins handed over by the Yan family, Li Weijian flew on the horse and bowed to Yan Fengzhen in front of the door, and then turned the horse's head and walked out of the alley.

Wu Haiping, who was behind him, urged the horse to go parallel with him, his face was worried, he really didn't understand what hole cards Li Weijian was hiding. The former Guozi supervised the sacrificial wine, the two Huai patrols the salt imperial history, and the Rongguo Mansion, and now even the mansion of the squire of the criminal department is unhindered.

On the way back, Li Weijian said that he would also visit Gu Weiyue, the Shangshu of the Ministry of Industry, if he was as enthusiastic as this, he was afraid that he would inform the owner of this matter, and the owner would rather give up three thousand taels of silver to make friends with this Li Gongzi!

Thinking about this section, Wu Haiping said with a small meaning: "Childe, do you still want to go to Shiban Hutong?" ”

"Forget it, it's too late today, let's go tomorrow."

After walking for a while, seeing that Wu Haiping had never spoken, Li Weijian said strangely: "Huh? How can you live so peacefully? ”

"It's not like I'm looking at Childe thinking about things, so I don't have words."

Wu Haiping's careless appearance was in his eyes, and Li Weijian's mind turned to understand what he was thinking. Immediately smiled and said: "Go back and buy a tape measure and give it to you an errand, this Jingshi walked around and carefully measured how deep the dry well was." If you have the chance, measure how deep the sweet water well has been. If you do this well, you will not be able to benefit from it. ”

Wu Haiping didn't mention who would pay for the money to buy a tape measure, and immediately patted his chest and said, "Don't worry, Son, this matter is on me." ”

………………………………

Qingwen walked gracefully with a late food box, and as soon as she opened the curtain through the hall, she saw a mother-in-law in the mezzanine waving at her.

Qingwen took two steps and stepped forward and shouted, "Aunt Lai." ”

Aunt Lai gently pinched Qingwen's cheek and said with a smile: "I know everything, don't worry, I will always call you to Bao Erye's room in a while." It's just that you have to keep it yourself, don't be taken advantage of by the surname Li. ”

Qingwen's cheeks flushed when she heard this: "I...... I won't. For some reason, the red upper body suddenly appeared in front of him, and his cheeks became more and more rosy. Qingwen said in a low voice: "Xu I hated the old lady, so I sent it here." There is no shortage of people in the room of the second master of the left and right, and the fourth master is gentle to others, so it's good for me to stay here. ”

Aunt Lai's face changed suddenly: "Confused! The surname Li is just passing by, and he will leave after the autumn season, where do you have any hope at that time? I'm afraid that I will be sent to serve the others again. After a pause, Aunt Lai's tone was a little smoother: "You can rest assured, I will handle this matter, you just wait." ”

After saying two words, Aunt Lai hurried away. Qingwen carried the food box and frowned without self-examination. Up and down the house, everyone knows that the maids in the second master's room are the best, no matter what they eat or wear, they are better than the maids in other places.

Yesterday, Li Weijian pointed out why she was not transferred to the second master's room by the old lady, and Qingwen thought a lot. She is already smart, and she knows that there are many people and things in the second master's room, first there are attackers, and then there are charming people, if she goes, I am afraid that there will be intrigues.

And the fourth master also said that he wanted to teach himself to read and write......

Thinking about it, the quiet courtyard in the northeast was in sight, and Qingwen saw Hongyu smiling and sending a strange maid out of the door, caught a glimpse of Qingwen, shook her head and entered the door.

Qingwen secretly gritted her teeth, walked a few steps and carried the food box into the main room. Putting the late food box on the table, he turned his head and washed the red jade that wiped the ornaments on the Bogu shelf and said, "Who is that person?" ”

"Sister Ying'er from Lixiangyuan, I'm here to send an invitation to the fourth master." Hongyu stopped the guy in her hand and looked at Qingwen with a smile: "Do you want to take it apart and take a look?" ”

"You-" Qingwen is smart, but she is a clumsy person, and quarrels can only be caused by temperament. Remembering that she was harmed by Hongyu yesterday, Qingwen immediately gritted her teeth, and was about to open her mouth to make noise, but she heard Xiuying's surprised voice in front of her: "Childe...... The fourth master is back! ”

Hongyu threw away her veil, turned her head and went out. Qingwen became more and more annoyed in her heart, and hurriedly went out with her.

That Xiuying was a fool, she only knew how to talk around Li Weijian, but later Hongyu came up first to relieve Li Weijian.

"Has the fourth master eaten?" Ruby asked.

"I've eaten it, and I ate it at Yan Shilang's house."

Hongyu said happily: "The old man waits for dinner, and he must have taken a fancy to the child's talent." ”

Li Weijian shook his head: "Wrong, Yan Shilang is not at home, it was the second son of his family who pulled me to eat." ”

Hongyu said: "As soon as the fourth master arrives in Beijing, he befriends the son-in-law of the Shilang family, and he will have a good future in the future." ”

"Hahaha, borrow your auspicious words."

Qingwen was clumsy and couldn't say such flattering words, so she became more and more angry with the flattering Hongyu.

Li Weijian caught a glimpse of Qingwen and saw that she had a small face, and immediately smiled: "Huh? Who upset you? ”

"No," this filth couldn't be appealed to, so Qingwen said: "Childe, the invitation sent by Lixiangyuan is placed on the table in the house." ”

"Oh? Let me see. ”

Li Weijian walked in quickly, copied the invitation card on the table, but saw that the handwriting on it was beautiful, and it was written in the name of Xue Pan, and he was grateful for his righteous action, and invited him to go to Lixiangyuan for a banquet tomorrow.

There was a faint chic fragrance on the invitation, and Li Weijian thought, I'm afraid this invitation was written by Baochai, right?

(Note 1: The Governor is the honorific title of the Governor.) ）

ps: The station is short, you can invest with confidence.