Screws are an indispensable tool in hardware craftsmanship and an important step towards industry.

In the past, Lishan artillery was mostly buckled with iron plates, and then used springs to increase elasticity.

Lishan already has screws, but now the screws in Lishan are very rough, the screws will be very large, and the nuts are still square.

Of course, in the history of human production, there have always been screws, and since ancient times, the wisdom of laborers has been used in production, and many tools can be made.

Screws are naturally among them.

But the screws that Lishan is casting now are different, which are fine screws on metal casting.

In the workshop, tools are used to tap metal parts, but they are all manual, and it is very tiring to use.

There are always endless technical problems to solve, and after Lishan uses copper, he can use his brains on the screws.

Copper has good ductility, and it is indispensable for all aspects of casting.

This is also the reason why Lishan said that he would win the right to cast copper.

Outside the workshop, Xiao Qingqing and his younger brother had just come back from listening to Mr. Ouyang Xun's lecture, and the sister and brother had listened to the class all morning, and their brains were dizzy at the moment.

"Sister, Daddy is in the workshop again."

Xiao Qingqing looked at it when he heard this, and whispered: "The bell tower on the mountainside hasn't been built yet, and my father is really busy." ”

Xin Xin'an nodded heavily, "Aunt Xiaohui and Aunt Xiaowu also seem to have endless things to do. ”

"yes, we have endless books."

Hearing my sister say this, careful Ann's fat face collapsed.

It's spring again, and in April, the sun shines down, and Guanzhong gradually regains its warmth.

Zhang Yang wrote a letter to Chaozhong and asked his aunt to send it.

Xiao Qingqing came with a piece of paper, "Dad, Li Xiang is here." ”

Speaking of Li Xiang, he is too wooden, and he has not been as cheerful as the children of Lishan since he was a child in the East Palace.

Zhang Yang sat down again, "The prince is also here?" ”

"The prince didn't come, but Li Xiang came out of the East Palace, saying that he wanted to ask his father a question." She placed a piece of paper on the table, "I said I wanted Daddy to write down his wishes." ”

Zhang Yang said indifferently: "Why do you want to write for your father?" ”

Xiao Qingqing was also confused, and whispered: "Yes, why do you want your father to write it." ”

Zhang Yang picked up his pen and wrote, "May Datang be able to go through all the ups and downs, may Datang be able to turn the tide even when it is overturned, may Datang's past pain be bridged, and may Datang's flag be planted in every corner of the world, which is still so simple and lovely." ”

Xiao Qingqing looked at it, and he unconsciously read it out loud.

"May the hearts of the Tang people always be accompanied by dreams, may the children of the Tang people be able to grow up strongly, may the Tang people be able to smooth the mountains and rivers, may the Tang people be able to have dreams, and can yearn for a beautiful ......"

After writing these and handing the paper to his daughter, Zhang Yang said: "Okay, there are many, many more, I won't write them down." ”

"Well, my daughter will go to Li Xiang."

After an hour, she came back again, "Dad, Li Xiang asked again, if the Tang Dynasty is rich and strong, will it repeat the mistakes of the past when it was prosperous." ”

Zhang Yang said with a smile: "Then pay close attention to the construction of Sipin, the books that people must read in their lives are Sipin, and the so-called Sipin is thought and morality, and firmly grasp the construction of the spiritual world." ”

"Well, my daughter will go and reply to Li Xiang."

There are many people who come to the spring outing this year, and the Guanzhong of April Day is the time when everything recovers.

Li Xiang sat on the wheel of the carriage, the paper in his hand moved with the wind, and the eight-year-old read: "May Datang be able to go through all the ups and downs, may the banner of Datang be planted all over the world, and may there be people in Datang who can turn the tide when it overturns......."

"May the children of the Tang people grow up strongly, and may the hearts of the Tang people always be accompanied by dreams......"

The child's words reached Li Chengqian's ears, and the prince of the East Palace asked, "Is this ......?"

Li Xiang replied: "The child asked about the wishes of the Marquis of Lishan County, and he wrote these to the child. ”

Li Chengqian looked at the handwriting and nodded, "Well, this is written by Zhang Yang himself." ”

He whispered, "May there be a dream in the hearts of the Tang people......"

This is Zhang Yang's wish, but his wish did not mention Lishan at all, and he gave all his wishes to Datang.

Li Xiang said again: "The child asked about the future again, one day the Tang Dynasty is rich, what should I do like Sheng Han?" ”

Li Chengqian asked with great interest: "What did he say?" ”

Li Xiang replied: "The county marquis said that we must firmly grasp the construction of ideological products, and we must do a good job in ideological and moral construction. ”

"Well, Lone understands."

Li Chengqian's eyes looked into the distance and took a deep breath.

The Weishui River flows eastward, filling the fields along the way.

Lishan's letter was delivered to Chang'an City, and someone ran briskly from Suzaku Street.

Di Renjie was sitting on the street supporting the drunk Zhang Cambodia, and saw the man running by like the wind, and ran towards the Suzaku Gate with a brisk walk.

Zhang Cambodia opened his eyes slightly, "Is this another urgent report?" ”

"Well, probably."

Di Renjie helped him and replied calmly.

In Zhongshu Province, a roll of paper sent by the prince is being circulated by everyone, and Zhang Yang has made a lot of wishes to Datang.

The more Chu Suiliang looked at it, the more wrong it became, but he couldn't say that there was anything wrong, and he always felt that something was missing.

Suddenly, my heart shook, and I thought of it.

It should be added that May Datang last forever.

Of course, these words are good, but who can guarantee that this Tang Dynasty can really last forever, as strong as the Qin and Han dynasties, and it has also become a chapter in the annals of history.

"Cen Zhongcheng, a letter from Lishan."

Cen Wenwen was looking at the teaching recitals in various places this year, and was interrupted by the small officials on the side.

He stretched out his hand to take the letter, looked at the words in it, frowned at first glance, and suddenly stood up again and hurried out of Zhongshu Province.

In the Wude Palace, Li Shimin often comes here to see, this is where the Emperor Li Yuan lived, and the living room on the side is recording His Majesty's words and deeds today.

This is a living note, Your Majesty's behavior of coming to Wude Hall today is naturally to be written, although the Emperor Li Yuan no longer lives in the palace, but His Majesty will still come here often to see, nostalgic for the years when his father was here.

However, as long as His Majesty says a word, the living room will also erase this matter on the living note, and most of the time His Majesty will not do this, unless His Majesty quarrels with the Marquis of Lishan County.

"Your Majesty, Cen Wenwen is here."

After the prince went to Lishan, Li Shimin was very uncomfortable, because these eunuchs were not as effective as the princess, and their voices were loud and small.

If the sound is too loud, Li Shimin will feel that his brain is being pumped.

The sound is too low to be audible.

They always have a bad grasp of the proportions.

Li Shimin said in a deep voice: "Summoning him into the palace." ”

Cen Wenwen stepped into the hall and handed over the letterhead, "Your Majesty, this is a letter from Lishan." ”

"What? What would he like Datang to do? ”

Hearing this, Cen Wenwen secretly sighed in his heart that the news was so fast, and the Zhongshu Province had received the paper handed by the prince for less than half a moment, and His Majesty already knew.

Li Shimin took the paper and frowned, "I asked him to write more chapters, but after a winter, he just didn't hand over a copy to advise, why ...... today?"

The words stopped in the middle of the conversation, and His Majesty was silent again.

Cen Wenwen bowed down and said, "Your Majesty, the minister is willing to take a trip to Lishan." ”

Li Shimin sat down, his eyes were gloomy a lot, "He actually wants to sell the papermaking technique to the court." ”

Cen Wenwen replied: "What the letter says is a complete papermaking technique, including the secret recipe of pulp and recycling. ”

Of course the court wanted it, this is a good thing, but there was not the slightest joy in His Majesty's eyes, because he saw the price, it would take 100,000 yuan for the court to buy a complete papermaking technique!

Cen Wenwen said in a deep voice: "Your Majesty, Lishan makes thousands of feet of paper a day......

"Why didn't he come and grab it!"

Li Shimin slapped the letter paper on the table and scolded angrily.

Cen Wenwen was halfway through his words, and was scolded back by His Majesty's angry shout.

"This shaft! This shaft!" Li Shimin paced back and forth, and said: "One hundred thousand!" 100,000! He thought that how much money I had, his family business in Lishan was enough to squander, I never dared to squander, it was all the country's capital! ”

Cen Wenwen hurriedly said: "Your Majesty is angry. ”

"Anger?" Li Shimin glared and said: "Today he dares to offer me a price of 100,000 yuan, tomorrow it will be 300,000 yuan, 1 million yuan!" ”

"Don't think I don't know his methods."

"He sold a paper-making technique three times, and he has already used up the value, and since it has no value, it should be dedicated to me."

"Shaft! Shaft! ”

As if he was angry, His Majesty's eyes were red.

Cen Wenwen wanted to persuade His Majesty to calm his anger, and if he obtained a complete papermaking technique, he would be able to obtain a factory in Lishan, and if the court could get a glimpse of one or two essences of casting, he would also be able to benefit.

It depends...... Your Majesty is angry, and most of the time he can't persuade him.

Li Shimin was in a good mood because of Zhang Yang's wish, and now he was angry because of Zhang Yang's letter.

The living room was recording, the pen in his hand kept writing, and the handwriting dragon and snake raced, recording the scene in front of him.

Li Shimin glared at this living man and said angrily: "Don't remember! ”

The pen in the living room's hand suddenly stopped.

"Torn!"

The living room quickly tore off this page, and the living note of the Tang Emperor was so missing a page.

Seeing that His Majesty was about to walk out of the Wude Palace, Cen Wenwen said again: "Your Majesty, what are you going to do?" ”

Li Shimin put on a black face and said coldly: "I will personally lead the troops to Lishan." ”

Cen Wenwen asked, "Is Your Majesty going hunting?" ”

"That's right! Hunt! Li Shimin gritted his teeth, and his original intention was to capture the kid from Lishan alive in Chang'an City, and first cut open his stomach to see what his heart and liver looked like.

"Your Majesty! The minister is willing to go to Lishan to negotiate with the county marquis, but the price is by no means 100,000 yuan. ”

"Fifty thousand won't do!"

Seeing that His Majesty added, Cen Wenwen stopped talking again, and replied in his heart: "The minister understands." ”

Today, His Majesty lost his temper again, and Li Shimin walked into the Lizheng Hall and sneered, as if he had seen Zhang Yang being hanged in front of Chengtian Gate.

"Let people go and wash the Chengtianmen again, it hasn't been washed for a long time."

The palace maid on the side listened and hurriedly went to order.

"Hehehe......"

Hearing his father's sympathetic laughter again, Dongyang and Gao Yang were so frightened that they said that their brother-in-law was really strange, how could a letter make their father like this.

"Your brother-in-law wants me to buy his paper-making skills for 100,000 yuan." Li Shimin put down the tea bowl and shook his head and sneered, "Hehe, 100,000 yuan." ”

Dongyang and Gao Yang didn't dare to squeak at all, for fear that His Majesty would jump like thunder when they squeaked.

In fact, in the early years, Lishan did hand over many instruments to the DPRK, and the craftsmen of the Ministry of Industry studied those instruments for three or two months, dismantled and reassembled, and later found that without the technology of Lishan, many parts could not be made.

For example, the spring is a small thing, which has plagued the Ministry of Industry for many years.

How the hell this little thing was made?

The Ministry of Industry was able to make large springs, but they were nowhere near as elastic as Lishan.

Later, this reason was attributed to the iron casting technique of Lishan.

The iron produced by Lishan is so evenly proportioned that after dividing it into equal parts, each piece weighs about the same.

There must be an ulterior secret recipe for this casting method.

Experienced blacksmiths could tell that Lishan had added something else to the iron casting.

Due to His Majesty's orders, Cen Wenwen sorted out the report about Lishan overnight, and Lishan not only announced the secret recipe of soap to the cooperative townships and counties, but now also handed over the papermaking technology to the court.

It seems that Lishan is abandoning these secret recipes, and people are profitable, Cen Wenwen thinks so from beginning to end.

If Lishan feels that these secret recipes can be discarded, then for Lishan, it must be for the greater good to abandon these secret recipes.

The next day, Cen Wenwen found Li Zhi, the king of Jin.

Li Zhi is a disciple of Lishan, just came out of the mountain last year, to talk about the understanding of Lishan, this His Royal Highness the King of Jin is the first in the court.

It's just that today Li Zhi and Di Renjie are sitting in Qujiang Pool drinking wine.

Di Renjie said: "Cen Zhongcheng, how can this Qujiang still be built." ”

"yes."

Cen Wenwen replied with a sentence to deal with the thirteen-year-old brat.

Di Renjie looked at the working people carefully, and said, "Actually, it's very simple to build a house, isn't it?" ”

Letting Di Renjie talk to himself, Cen Wenwen looked at Li Zhi, "Why?" ”

Li Zhi was puzzled: "Why why?" ”

"Why did Lishan take out the soap and sell the papermaking technology to the court."

Hearing this, Di Renjie was shocked, and then His Royal Highness the King of Jin heard another terrible thing.

Li Zhi frowned and said, "Are you selling your property?" ”

Cen Wenwen smiled stunned, waved his hand and said, "Impossible." ”

"Is that my brother-in-law thinks soap and papermaking are not profitable?" Li Zhi said worriedly: "In fact, when I was in Lishan, I concentrated on learning art, and rarely involved in Lishan's production plan. ”

I can't say that I didn't study very well or how well I learned in Lishan.

Among my brothers and sisters who studied in Lishan, I was a poor student.

I can't ask about any production plan at all, and I can't keep up with my studies.

Now that Cen Wenwen came to ask, Li Zhi put on a profound demeanor as much as possible, and said: "My brother-in-law once said that the productivity of Lishan is limited. ”

"Thank you, Your Royal Highness King Jin."

Cen Wenwen walked away quickly.

Li Zhi shook his head and said: "I don't understand, I don't understand, why is Cen Zhongcheng in such a hurry, is it possible that he is right?" ”