After the prosperous Tang Dynasty

The night is getting darker and the moon is full of sky.

The Xiao Family Village in Shanhai Town, because the Xiao Family’s old house is located here, shows an unusual bustle and prosperity. Such a village is respected even by the local county guard. Although it is not a city, there are some living habits. It's still the same as in the city, every night there are special watchmen passing by, and in the long voice, there is an obvious tone of Jiangnan Wu Nong's soft language, which is completely different from the accent of Chang'an City.

In the study, Xiao Yansui was splashing ink and scribbling thousands of words. There were also a lot of chemical equations and schematic diagrams of the cement forging process in it. Anyone who didn't know how to look at it would probably lose his head.

The light from the candles in the room was limited, Xiao Yansui had long ago turned out the mirror he had made by hand, and placed it in front of the candles, relying on the reflection of the light, it could be a little brighter.

On weekdays, because of insufficient light, Xiao Yansui, a night owl in her previous life, has developed a good habit of going to bed early in this life. Unless there is something else, she rarely stays up late.

But today, no matter what mood Xiao Song is in, anyway, Xiao Yansui was completely inspired by the series of plans he and his grandfather talked about during the meal. Just start working, starting from the preparation of cement raw materials!

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From the principle to the actual industrial application, although it cannot be said that there is still a natural barrier, there is still a long way to go.

For Xiao Yansui, even in later generations, the manufacture and use of cement is a technology that has long been used by civilians. However, after the current era of the Tang Dynasty, when even the most basic industrial system did not exist, it became a reality. It is equivalent to starting from scratch with zero foundation.

No matter how excited and smug she is, Xiao Yansui will not care about these problems that need to be overcome. Moreover, in order to ensure that she will not miss any omissions due to a momentary negligence in the process, she even took the paper that was made in her room early the next morning. All the papers were directly cut into pieces of about [-]-momo later generations, and then I asked the carpenter to help me get a binder, which was specially marked with the date every day as an experiment record book.

However, within a day, Xiao Yansui roughly figured out the next work process, and then ordered the servants under his command to purchase the mined limestone, clay, and appropriate amount of metal minerals, etc., all the way to the search. Find out if there is a suitable kiln nearby that can be used to calcine cement.

As for herself, she re-planned the experimental process based on the existing conditions—after all, according to the principle Xiao Yansui understood, the temperature and time of the whole process of calcining cement can be counted and quantified. However, this modern chemistry The most basic experimental conditions are definitely not available in this era. Whether it is brick kiln or porcelain, most of them rely on the experience of craftsmen and craftsmen. When Xiao Yansui comes here, she will naturally invite suitable craftsmen to do these things. However, Knowing the experimental data that has been verified by later generations, she is still more inclined to reduce unnecessary repeated attempts, use the least number of times and the fastest time to obtain the finished cement clinker, and then try to fix the production process as much as possible. The workflow starts right away.

In the evening, Xiao Yansui, who had been busy all day, finally stopped what she was doing for a while, stood up and stretched, planning to have dinner first, and then go for a walk with the dog after dinner. When he opened the door of the study, he saw Axiu walking quickly, obviously looking for him.

Axiu briefly talked about the incident that Xiao Song's maid came to deliver a message.

"Ah Weng told me to go over to finish the meal?" Xiao Yansui said softly "ah", after thinking about it, he simply said, "Sure, I'll go over now, let someone take my dog ​​over there too!" After eating later, you can just walk in the yard for a while and then come back.

Axiu nodded and immediately responded.

After Xiao Yansui strolled to Xiao Song's place, he found a seat beside him and sat down when he heard his grandfather smile and ask: "Liu Niang, I have a letter from Aye, Aniang and the others. Is it finished? Ah Weng plans to send the letter to Chang'an City tomorrow morning."

Xiao Yansui: "..."

She silently raised her head and looked at Xiao Song innocently.

Xiao Song was originally planning to listen to his granddaughter say something casually. After finishing writing, he will send the maid to send it over later. As a result, seeing Xiao Yansui's current appearance, he suddenly understood as if he was blessed, He asked tentatively, "Have you finished writing yet?"

Xiao Yansui: "..." No, she put all her thoughts on the cement and forgot about this trivial matter long ago.

Although it was somewhat embarrassing to completely forget about this matter, Xiao Yansui decided to make up for it in front of her grandfather, blinked her eyes, and replied calmly: "I'll go back and continue writing later. Bring it back tomorrow morning!"

After all, the elderly usually go to bed early at night, so there is no need to send them over to bother Xiao Song after writing a letter from home.

Xiao Song didn't say much, but he couldn't help but stroked his beard with a smile. Seeing this situation, why didn't he know what was going on?However, today's experience made him confirm once again that for a casual person like his granddaughter, he was really thinking too much about the little girl being homesick and wronged. There is no need to worry about these things at all... …

After dinner, Xiao Yansui took the dog by the leash and ran away from the house. However, seeing the three excited dogs, she still walked around the yard twice before finally going back and pushing On the open table, there are all kinds of things sorted out today, and I start to write letters to my parents.

Picking up the pen, he habitually wrote the most common greetings, and then briefly introduced the events of these days to his parents. When the draft was about to be finished, Xiao Yansui's pen could not help but pause.

——The carrier of communication, letters, due to their special emotional resonance, collection and commemoration, or pen pals who have never met before, has been preserved until the modern age thousands of years later. However, for Xiao Yansui, she is still more important. She tends to instant messaging and writing letters, which are leisurely and elegant, and she is not very interested.

To put it simply, Xiao Yansui is not very good at expressing emotions. A good letter from home, as she wrote it, almost became a memo.

After looking at the standard old-fashioned greeting that he had just written, Xiao Yansui suddenly felt a bit of a headache when he stroked the schedule of the past few days and the work plan for the next few days in chronological order.

She seems to be writing letters to her parents, rather than writing work diaries and work plans to her boss...

Xiao Yansui picked up the piece of paper, just about to throw it away, but the movement of his hand suddenly stopped, hesitating for a while, Xiao Yansui finally gave up the plan to write a new copy, After all, she was afraid that after deleting the work plan, there would be some simple greetings left, and the content of the letter would appear even paler.

After deliberating and hesitating for a while, Xiao Yansui finally decided to pay attention, let's just keep her mouth shut. Thinking about it, seeing her life in her hometown is so fulfilling every day, Xiao Hua and Mrs. Pei will definitely be very relieved...

After self-brainwashing with a calm face, Xiao Yansui folded the letter paper slowly, then stuffed it into the envelope, sealed it, and looked at the sky outside the window, it was already the middle of the moon.

Obviously, I have thought about the work plan, and I just went through it again in the book at home. I didn't expect it to take so long...

When I was writing something just now, my brain was running at high speed, and I didn't feel anything. Now it stopped suddenly, and Xiao Yansui finally felt a little sleepy. He yawned lazily, and handed the envelope to the maid , I squinted my eyes and went back to the bedroom, planning to go to bed and rest after washing up.

Early the next morning, the people sent by Xiao Song to deliver letters to Chang'an City still set off on time, because it was rare to stay up late, so Xiao Yansui opened his eyes the next morning, asked the time, then lay down again and continued to sleep for a while.

Xiao Song was dumbfounded when he learned that the candles in his granddaughter's study had been lit until midnight last night.

He didn't know what speechless things Xiao Yansui wrote to Xiao Hua and Pei's family letters, he just regarded it as a child, no matter how calm he looked on the surface, even because he was busy with other things She forgot to write the letter, but whenever she thinks of her parents, her heart is still full of words that she wants to confide in...

Rao is an old fox like Xiao Song, who rarely loses his eyes once when facing his granddaughter.Just when the grandparent and grandson were still immersed in the illusion of missing their relatives, compared to Chang'an City, the days in Xiaojia Village, Shanhai Town, which seemed particularly leisurely, passed by day by day.

Around mid-July, it was a day when the heat was unbearable, Xiao Yansui directly asked the carpenter to polish various wooden handles, fan blades, pedestals and other accessories of several sets of hand-operated fans according to the drawings she gave.

Because of the lack of metal, the Tang Dynasty is still more popular with wooden mortise and tenon structures. At this time, most of the craftsmen are experienced craftsmen. Therefore, Xiao Yansui does not have to worry about the carpenters making it. The issue of whether the accessories can be assembled reasonably, in contrast, still requires the use of brass and other wear-resistant metal core bearings, clockwork springs, gears and other fragmentary but critical small accessories, which require more attention from her.

Simply, Xiao Yansui went directly to the blacksmith's shop with his guards and servants, picked up a stool and sat down, and when the blacksmith was making parts according to the drawings, she would remind him from time to time, especially when the blacksmith made parts. I know that I need to do this, but because of too much common sense, I may not have marked the points on the drawings one by one.

After all, when Xiao Yansui was still in college, he and his classmates used to grind screws and other things with their own hands, regardless of gender, when they were taking basic practical classes such as metalworking internships. with...