When Cheng Chuliang was researching the phonograph, Li Wu made progress, and he found a river beach with a relatively fast current, which fully met Jiang Wei's standards for workshop land.

Li Wen also contacted suppliers of green bricks and tiles.

Li De also found skilled blacksmiths and carpenters, began to build a hydraulic waterwheel, and once again began large-scale recruitment, everything went smoothly according to Jiang Wei's instructions. It is expected that the workshop will be ready for construction in a month.

Listening to Li De's reports one by one, Jiang Wei took a sip of cool white water, after the cement began to be produced, then everyone should first know the role of cement and the value of cement.

There are many uses for cement, and the best way to promote it is undoubtedly to create a golden signboard to let everyone understand the value of cement with facts.

As for the pricing should not be too high, this will affect the promotion of cement. The profit should not be too low, half of the cost of the profit is enough.

Cheap iron-making slag, coal ash that barely cares about the cost, and gypsum mines that are bought at low prices, and limestone. Such a cost is enough for the price of cement to reach an extremely low price.

Jiang Wei believes that under such a low price, cement will be promoted soon.

His goal is to build a modern commercial square, establish a world business center, strengthen the ties between the countries of the world, and use commercial means to sweep the wealth of the countries of the world.

He didn't know if strengthening the commerce of the Tang Dynasty would change history, after all, the commercial economy of the Song Dynasty, which was so powerful that it occupied more than half of the entire world, still collapsed.

But the Tang Dynasty had an advantage that the Song Dynasty did not have, that is, it did not promote literature and suppress martial arts.

However, the commercial plaza is not so easy to build, and building a world commercial center is a long-term plan. Although he didn't understand politics, he also knew the phrase "shoot the first bird", so he decided to pull some people on the boat, these people must have a certain status in terms of identity, otherwise it is meaningless.

But he doesn't know any dignitaries, so what is the way to solve this problem and let those dignitaries join in?

Jiang Wei thought about it for almost an afternoon, but still had no clue,

The next day, Cheng Chuliang's ten-day assessment deadline arrived, and Cheng Chuliang came to Xu's Mansion in the morning.

"Master, the disciple has already answered the first question, Xiao Wang is a soldier, Xiao Zhao is a scholar, and Xiao Zhang is a businessman, I don't know if it's correct?"

Jiang Wei nodded and affirmed his answer, this logic question is not difficult, but most of the Datang people have weak logical thinking, so it is a little difficult for them.

"How long did you think about it before you came up with an answer?"

Cheng Chuliang smiled ashamedly, at first he could say that he was in a fog when he looked at the question, and when he unlocked the answer, he had a feeling of sudden enlightenment, and even a feeling that it was so simple, and when he heard Jiang Wei ask, he was a little ashamed.

"The disciple was stupid, and it took two hours to come up with an answer."

Two hours, or four hours. Jiang Wei felt a little surprised, of course, if a person with modern education came to answer this question, he might be able to get the answer in a few minutes, but some people might need an hour or even longer.

This is a logical question, which tests the strength of a person's logical thinking ability.

For people of this era, this topic is obviously not very friendly.

"What about the second question? What did you find? ”

Cheng Chuliang thought about it seriously,

"Master, the disciple found that if the iron rod rotated faster, the faster the gramophone spoke, and the more it turned, the more the sound became more and more indistinct. It's not just tin foil that catches the sound, but the iron catches the sound too, but it's blurry. ”

Jiang Wei nodded and asked

"What else did you find?"

"So the disciple was wondering if the reason why he was caught by these iron tools or tin foil was because of the iron needle that rotated against the tin foil, because when the iron needle was in direct contact with the iron rod, it made some more noisy sounds, while the smoother tin foil did not have too much noise."

Jiang Wei glanced at Cheng Chuliang in surprise, can this young man still draw inferences? I can't help but be a little curious,

"What else did you find?"

Cheng Chuliang frowned and pondered for a while, then said,

"The disciple is stupid, and the disciple knows nothing except these."

Jiang Wei smiled,

"You're not stupid, because you're careful, that's why you can find this. As a student of mine, being careful and bold is one of the conditions. ”

Cheng Chuliang's heart beat faster for a while,

"Master, then ...... I?"

Jiang Wei couldn't help but smile when he saw his nervous look,

"You've passed the test."

Cheng Chuliang knelt on the ground excitedly and solemnly bowed to his teacher.

"Disciple Cheng Chuliang, meet the master."

"Get up."

Jiang Wei was a little emotional, and he didn't remember this disciple's name until now. He glanced at Ruoniang, who was looking at the lively Ruoniang in the room,

"Ruoniang, go to the desk and get those three books."

"Oh."

Ruoniang took three books, which were not enough, namely elementary arithmetic, elementary chemistry, and elementary physics.

This is what Jiang Wei has prepared for the purpose of accepting apprentices these days, of course, it is not written with a brush, and it is written with a charcoal pen.

Cheng Chuliang glanced at arithmetic, he had learned some of this, but the master didn't pay attention to these and didn't know how to take the test, so he only learned some simple ones.

But the second and third books, I don't understand.

"Master, what is physics? What is chemistry again? Is it a completely new discipline? ”

Jiang Wei thought for a while,

"Physics is the truth of all things in the world. And the so-called chemistry, the life of things is called the transformation, and the extremes of things are called changes, this is chemistry. ”

Cheng Chuliang nodded, and then Jiang Wei continued,

"These are the foundations that support immortal arts and immortal weapons, you take it back and study it seriously, if you don't understand anything, you can come to Xu Mansion to find me for an answer."

Cheng Chuliang luggage again,

"Master Xie taught, disciple Cheng Chuliang will definitely live up to the master's expectations."

Jiang Wei nodded,

"Go ahead."

After Cheng Chuliang left, Jiang Wei called the domestic servant Xiaoniu, well, he had forgotten the name of the domestic servant. He wrote a post and handed it to Niu to go to the Song family, looking for Song Cenyue, the lady of the Song family.

Originally, Jiang Wei planned to go in person, but the weather suddenly became cold last night, a little cold, no way, his body bones were too weak, and the amount of exercise suddenly increased, running increased to 400 meters, and his muscles were strained.

When Song Cen Yue received the post sent by the domestic servant Xiaoniu, she read it and saw that it was written very concisely, that is, to go to Xu's mansion to talk about it.

Song Cen Yue felt some doubts, so she asked the servant calf,

"What else did your son-in-law say?"

The servant calf shook his head,

Song Cen Yue was even more puzzled, a woman came to visit a man alone, she couldn't just do it casually, if she didn't do it, it would cause some unnecessary trouble and ruin her reputation.

In the end, Song Cen Yue decided to go, but took her sister with her.