Su You came to Mr. Fan's study, where Mr. Fan was packing up his manuscripts.

Seeing Su You arrive, Mr. Fan smiled and said, "Have you made friends with Yuan Zhen?"

But Su You couldn't laugh at all: "Sir, after listening to your words during lunch, do you think you are going to live here forever?"

Mr. Fan said: "Mingrun does not have to be like this, and there is nothing bad here. There are flowers that are invincible in all seasons in Erlin Department, and grasses that are evergreen with eight knots. Although the culture is rough, the people are passionate. In my opinion

Ah, it’s much better than the intrigues among the big clans.”

Su You asked: "Sir, you are from a rich family, right?"

Mr. Fan nodded: "That's right. He's just a concubine. He hasn't gained any fame in his thirties. The first wife in the family is not virtuous, and she's being tortured everywhere. So I got angry and joined the wilderness."

Su You cupped his hands and said, "Sir, if you don't dislike me, you can live in Meishan."

Mr. Fan shook his head and said: "Forget it, I will stay in the Erlin Department, so the Ghost Master can feel at ease."

Su You was about to persuade again, but Mr. Fan raised his hand to stop him: "I have spent my whole life working here, how can I let it go by the wayside? Mingrun, you don't need to persuade me anymore. I am very good here, really very good."

After speaking, he took out two book boxes and said: "This is my notebook experience over the past twenty years. I have collected various roads, customs, tribes, and the evolution of the situation over the past hundred years in Southwest Yi and Dali."

"The defeat of Haoshuichuan is really disappointing. One important reason is that the geography is unclear and the enemy cannot be predicted."

"The Yunnan Illustrated Records collected by Wang Quanbin in the Shu Palace were dated a hundred years ago. If something happens in the southwest, I'm afraid they won't be able to be used again. Please take these away."

Su You bowed and said: "Sir, you have worked so hard and so hard, I sincerely admire you."

Mr. Fan said: "It was only after I arrived at Meishan that I figured out that the word mutual benefit is the way to navigate the southwest. This was inspired by you. Did you figure out the riddle I played with the general at noon?"

Su You asked: "Is this what brother Adunlie will do next?"

Mr. Fan nodded: "Yes, tell me."

Su You said: "The trade routes have been opened, so the next step is to consolidate them. I think what brother Adunlie needs to do is to eliminate the bandits on the trade routes."

Mr. Fan smiled and said: "You are really smart. Tell me, how would you act if I were you?"

Su You said: "I don't know much about the forces around the Second Forest Department. I think Mr. Fan is in charge, and he has already made plans before taking action. Plus the soldiers of the Second Forest Department are brave, so there should be no problem with force. I just want to ask one thing.

, if it’s a clearing out, what’s the route of march?”

Mr. Fan said: "The Erlin Department is in the north, so it will naturally advance from north to south, step by step, until it reaches Jianchang Mansion. With such food and grass, it will be ample for both advance and retreat."

Su You held up his hands and said: "There is too little information to make a conclusion, but based on what I know, sir, I suggest the opposite."

Mr. Fan said "Oh?" "How to do the opposite?"

Su You said: "Sir, I am afraid that you have been thinking about this issue for a long time, so you have fallen into a fixed mindset. In fact, we came from Dali this time and got to know Mr. Gao and Xiao Yanei, so the situation should have changed again."

"If we go from north to south, there will be a problem. The bandits may be driven into Dali by us. When we return to the army, they will come back and revive. How to solve this problem? Does the Second Forest Department still dare to drive troops into Dali?"

"Since ancient times, it is not uncommon for officials and bandits to collude, and it is not uncommon for bandits to respect themselves. If the bandits are related to the defenders of Jianchang Prefecture on the way, then the Erlin Department will provoke a border provocation. With the virtues of the Dukes of the Great Song Dynasty, they will

How to deal with it?”

Mr. Fan couldn't help but start tapping his fingers on the table, thinking.

Su You continued: "Now that Mr. Gao has entered the Song Dynasty, my suggestion is to stay put and endure for a few more months."

"Then we will explain our plan to Mr. Xiao Gao and ask him to go to Jianchang Mansion and lead the army to attack from south to north. At least we must strictly guard against it."

"Xiao Xianggong has just made meritorious service in civil affairs, and then he can make meritorious service in military affairs. I don't think he would be unhappy about it."

"In this way, regardless of whether the defenders of Jianchang Prefecture colluded with the bandits or not, the bandits were always ready to be suppressed."

"Without collusion, they would have performed meritorious service under the command of Mr. Xiao Gao; if there had been collusion, they would have had no choice but to sacrifice their soldiers to save the car."

"With this two armies attacking, the bandits will have no way to escape. This is a plan to eradicate the weeds."

"Afterwards, we will mend our relationship with Jianchang Mansion and share some of the dividends from the trade routes with them. In this way, we will gain some ground, increase our combat power, and clear up the business routes; Jianchang Mansion will share the benefits and gain military exploits; Mr. Xiao Gao

If we continue to enhance our prestige in the country, wouldn’t it be good for everyone to get what they want?”

Mr. Fan said: "It's just that the circle is a bit too big."

Su You smiled and said: "Although the trouble is a little more troublesome, it is better than settling it once and for all, and it is difficult to cause any accidents."

"If Sir agrees to this policy, then when Mr. Xiao Gao passes through Sichuan on his way back from his mission, I will go and convince him!"

Mr. Fan slapped his thigh: "Okay! When a lion fights a rabbit, you should try your best. If you can get more help, it will naturally be safer!"

After deciding on the strategy, they turned to internal affairs and talked about the next matter of helping the Erlin Department.

Before walking out of the study door, Su You turned around again: "Sir, can you tell Su You your place of origin and family status? Or your real name? People like you should not be lost in history without leaving a name."

Mr. Fan smiled slightly: "Mingrun, your idea is very utilitarian."

Su You had no choice but to bow deeply and turn around to leave.

Early the next morning, Atunlie led Shi Tong to explore the copper and iron mines, while Atunmi and Li Shuanshuo led the soldiers to carry out construction.

The winds in the Anning River Valley were extremely strong. It was only after Su You entered the river valley that he remembered that this was a windy area in Sichuan, so there was no need to use water power, revise drawings, draw windmills on boats, and make models.

Vertical water mills have been around in China for a long time. The wind mill is actually a slightly modified vertical water mill.

After a year of memories and experimental calculations, Su You has worked out the formula for the involute spiral based on the equidistant spiral.

With this, the analytical formula of the involute gear can be derived, and the involute tooth profile meshing transmission can be theoretically realized in the Song Dynasty.

This kind of gear has three major characteristics: the transmission ratio is constant; changes in center distance do not affect the transmission ratio; the meshing line is a straight line passing through the node.

Don't underestimate these three points. In mechanical motion, the first point can maintain a constant speed, the second point can accommodate errors, and the third point can reduce friction and vibration.

In today's Song Dynasty, he is the only one who can understand formulas. The children in the Earth Temple are still playing with circles and straight lines. They have just come into contact with trigonometric functions and are building tables of trigonometric functions.

However, Su You had great confidence in the guys from the Qin Tianjian of the Song Dynasty. They could make hydraulic clocks, calculate the radius of the celestial sphere, calculate the theoretical distance from the earth to celestial bodies, and discover the errors with actual observations.

It's just that they didn't realize that this error was actually caused by the difference between theoretical calculations and actual observations.

Theoretical calculation is to treat the earth as a point, that is, the center of the earth, and then calculate the distance to the stars.

The actual observation is the distance from the ground to the star.

In other words, these monsters have actually calculated the radius of the earth! This error is actually the radius of the earth!

Therefore, Su You believed that as long as a small hole was poked in the curtain, the clever people of the Song Dynasty would tear the hole bigger and bigger, and finally the light would be completely exposed. He might understand this faster than he expected.

Mathematics is the basis and method of proof for materialist dialectical thinking. The problem in the Song Dynasty was that there were talented people, and they were very good, but there were too few.

His task is to simplify the way of expression, facilitate understanding and dissemination, and expand the group of people, and then others may not need him.

Only after a group is formed can it have the power to correct deviations.

As for whether you have to do it yourself, it really doesn't matter.

Compared with the ideal gear, the gear currently used in the windmill of the Erlin Department is simple and crude, even cruder than the one in Kelongli Laboratory.

This is still the type of compass car used in the Western Zhou Dynasty. It is just two large round wheels, with a hole at a measured angle and a wooden rod driven into it, so that the wooden rod and the wooden rod can bite and push each other.

The craftsmen of the Erlin Department nodded happily, we can see clearly and do this!

The only thing that can be called relatively advanced is that the transmission shaft uses ceramic roller bearings brought from Meishan.

The windmill still has four blades, and the canvas can be rolled up to adjust the size of the wind receiving surface and adjust the speed according to the wind force.

By adding a stone mill, an air exhaust, or a lever hammer, you can get a mill, a large blower, and a forging machine.

It can be used for grain processing, mineral crushing, smelting, and forging respectively.
Chapter completed!