"It's not impossible to promise you, but I need to set a time."

Lu Chensheng thought about it, and then seemed to have made up his mind.

Batur was happy in his heart, and it was best if Lu Chensheng could agree.

"On what terms?"

Batur asked with a roar.

"Except for the time you spend here, if you don't come to settle the accounts within a month after you go back, you will have to pay an extra 1% of the total value of the goods every other day, and if you come back to pay it, you will not have to pay this interest."

"No problem!

When Batur heard this, he readily agreed.

As long as they bring back more goods, they can make a lot of money when they go back, and they will definitely be able to repay this amount of money when the time comes.

What's more, he didn't deceive Lu Chensheng in that jade mine, there was indeed something.

"When you go back, by the way, I will also explain this matter to the Huhu Kingdom, I don't care when they come back to settle the account, but the interest is still there."

Lu Chensheng said, rewriting the deed.

"What do you need, go back and think about it, the price, I count you lower, you can ask the people outside this price, the things in the city are specially sold to the people, so it will be cheaper, you don't need to take the price on the paper, and compare it with the goods in the city."

What Lu Chensheng wrote is the price of various commodities.

Batur knew about this, and nodded again and again.

Those foreigners outside, after bringing back the goods, sold them to their fellow tribesmen, which is called an expensive one, and they have heard of it in Loulan.

Now when I look at the price Lu Chensheng gave them, it is actually much better.

"Then I will think about it next time, and after the goods are confirmed, I will come back and talk to Your Excellency."

Batur looked at the dazzling array of goods on the paper, and he couldn't choose for a while.

Like some kind of soap or something, he's only heard of it, it's not tested yet.

He was going to buy some for himself first, and then decide how much he wanted to take.

Lu Chensheng agreed and let the other party go down first.

As for the things brought by the other party, they were naturally directly handed over to Lu Chensheng.

Lu Chensheng found someone to disassemble the goods and count them one by one, and then sent them to the silver warehouse.

Another order was also sent directly to the blacksmith's shop, and the other party was asked to create 500 pairs of armor.

Five hundred pairs of armor is not a small amount, and it will take a little time to create.

Lu Chensheng has already talked to the other party about this matter, and the other party is not in a hurry.

......

"I've been doing a lot of good work lately."

Lu Chensheng stood in front of the school hall and looked at the papers he sent, which was basically correct, indicating that these students are still very smart and usually work hard.

In his spare time, Lu Chensheng will also take the time to come over to have a look, and now he is very happy to see these students growing up.

"It's all taught by Mr. well!"

When the students heard this, they immediately responded loudly.

Lu Chensheng smiled and waved his hand, "This is all your daily hard work, which is still very good." ”

"I brought you some fresh things today, you have learned what a concave and convex mirror is before, and today I specially brought you something for you to see." 918

Lu Chensheng said, distributing the things in his hand one by one.

When the students saw this, their faces were immediately overjoyed, and Mr. had made something new again!

"The concave and convex lens allows the light to deflect when passing through the mirror, the concave lens can achieve the effect of dispersing the light, and the convex lens can make the light condense and magnify."

Lu Chensheng simply drew two lenses on the blackboard and talked to the students.

"Now you can experiment with the two mirrors in your hands."

Lu Chensheng waved his hand and asked the students to play with the mirror.

Hearing this, the students hurriedly lifted the mirror in their hands.

They had already learned this before, but there were no mirrors to use.

Although there are ice cubes, they are a little different from the lens in their hands.

A few leaned against the window, and the sunlight outside the window tested, and a piece of paper in their hands was immediately ignited.

Lu Chensheng came out on the stage with paper to make a rectangular object, and then took two lenses and put them in.

Seeing the students below, holding a magnifying glass to gather light and then raise the temperature to reach a flammable temperature, he just smiled and shook his head, but he didn't stop it.

After a while, after all the students were quiet, Lu Chensheng took the things in his hand and said.

"This thing is the periscope I talked about earlier, but it's just a simple model."

Holding two mirrors, as long as they are placed inside a cuboid, the lenses can be placed in a good position.

Although this thing does not have much effect at the moment, it can definitely be used in the future, and Lu Chensheng hopes that his students can understand the principles of these things.

Reflection of light.

A simple periscope model in his hand was handed to the students below to take a look at one by one.

They had studied this thing before, but it was only on paper, and when they actually looked at it, it still felt extremely novel, and it could also deepen the impression of these students.

After letting the students read it, Lu Chensheng asked him to disassemble the periscope model again, and then reassemble it with his hands.

At this moment, the students are all doing it one by one, with a little excitement on their faces.

Lu Chensheng's consistent teaching is to try to let them do more to see the actual situation when teaching, and then apply what they have learned.

The students also do a good job of this, and they will learn more about it on weekdays.

"The other one, it's a telescope."

After the glass came out, Lu Chensheng got a few things and brought them to the school.

The binoculars were handed down for the students to take and see.

The students were also amazed by such things when they held binoculars, and what they learned on paper and what they touched and saw with their own hands are really two different things.

Looking at the scenery in the distance, he was suddenly pulled in front of him, and he was even more amazed by the appearance of the slightest.

"Sir, why do you know so much?"

Erhu handed the telescope to the rest of the people on the side, and asked a little strangely.

The more he learned from Lu Chensheng, the more he felt the mystery of this gentleman in front of him.

Outsiders think that these students are extremely terrifying, they know everything, and sometimes they show it inadvertently, which is even more surprising.

But these students, they don't feel that they have learned anything, but feel a deep awe of their husband.

It's really because, the more I learn, the more I feel my insignificance, and they can't see the head of their own husband.