Qin Chuan has a new title, one is called Mr. Qin.

But teaching is not his specialty, and he can't do it anymore after only a few persistences.

Then he ran to invent a monocular.

This is something that suddenly comes to mind when he recalls the physics knowledge he has learned.

He was going to equip all the sentries and officers with a telescope, about a hundred, and if you count the worn scraps, you would need a lot of glass.

Nowadays, there are people in Qinchuan who have money, and it is not difficult to make this thing, and you can always get it by throwing some manpower and financial resources into it.

But he didn't want to do it, because his craftsmen were limited, so he had to invest in making firearms, and the existing technology was difficult to achieve mass production of glass, and it was not interesting to make small quantities, so it was better to spend some money to buy them.

So, just after spending the New Year at home, Luo Wen took a dozen letters written by Wang Jizong and went to Taiyuan and Yangqu again.

Those letters were written by Wang Jizong to his classmates or friends, asking them to help spread the news that Lou Fu hired scholars and all kinds of craftsmen at a high price, as long as he had a skill, he could find a well-paid job in Lou Fu.

Lou Nu is still too lacking in talents, lack of scholars, lack of all kinds of craftsmen.

After Luo Wen returned with dozens of craftsmen and a bunch of glass mirrors and glass bottles of various shapes, Qin Chuan began to be busy making telescopes.

This thing is actually not difficult, only two convex mirrors or concave mirrors, according to the focus of a copper tube to become.

The challenge is dealing with chromatic aberrations.

Early telescopes saw a colorful scene very, very unclear, because of the chromatic aberration of the glass when it was refracted and the Kepler telescopes could only see upside down images.

Modern telescope lenses are made of two lenses of different materials and curvatures bonded together to deal with chromatic aberration.

If Qin Chuan wants to make a clear telescope, he can only grind two pieces of glass into an arc with a high degree of anastomosis, and then carefully boil them, and glue them together through completely transparent fish glue to become an objective lens.

Without modern precision technology, the effect of hand-polishing and gluing lenses to neutralize chromatic aberration is far from the clarity of later generations, and the center boresight axis of the two bonded lenses is not at the same point, and ghosting and blurring inevitably appear.

Qin Chuan grinded a few glass bottles before finally making a barely satisfactory monocular.

The lens barrel is made of two copper tubes, which can be rotated to adjust the focal length between the objective lens and the eyepiece to achieve the effect of adjusting the distance within a certain range, the objective lens is a convex lens, the eyepiece is concave, and it is a positive image, but the field of view is narrow, the clarity is indescribable, and the multiple is only about four to five times, and the facial features on the face of the person fifty steps away can be seen clearly, and the outline of the human body two miles away can be seen, and the active human beings are found five miles away.

Come to Qin Chuan, make do with it.

But to his subordinates, this thing is like a baby.

Especially Zhao Wu, as soon as he got this monocular, his hands trembled inexplicably.

After a long time, he sighed slowly and said, "If I had this thing back then, I wouldn't have had to die so many brothers." ”

Next, Qin Chuan picked a few ingenious craftsmen and taught them to polish the lenses and make a batch of telescopes according to the existing specifications.

Then he was busy with his lecture hall, except for occasionally giving Wang Jizong and them a science lecture and supplementing the teaching materials, most of the time he lectured in the lecture hall.

His students include Luo Da Niu, Li Dingliang, Liu Youzhu, Zhao Wu, Liao Sangun, Lao Huang Shan Mao'er and other core backbones, as well as ordinary leaders of the imperial army.

He has worked with several backbones to compile the military regulations of the Guandi Army, which has a high degree of perfection, and imitated the establishment of the Qi Family Army, and improved the army establishment, the most basic unit is the team, a team of 12 people, with a captain and a man.

The three teams are one flag, with a general flag, three flags are a division, a hundred generals, three divisions are a bureau, a general is set up, three bureaus are a department, a staff member is set up, three departments are a battalion, and a main general is shot.

At present, the four battalion leaders of the first camp, the trapping camp, the Wudang battalion, and the Shifang battalion, the largest number of people is only 500 people, and the number of soldiers will be replenished one after another until the strength of one battalion, together with the escort of the general and the main general, reaches 3,000 people.

Qin Chuan planned to set up a new pro-soldier guard, uniformly wearing red armor and red cloaks, and they were called red-clothed attendants.

The former Guards Haw Par Battalion was split into a Javelin Cavalry Battalion to cover, contain, harass, assault and pursue.

When there is enough artillery, a separate artillery battalion will be formed to be responsible for fire support and fortification.

The speed at which artillery battalions are formed depends on the speed at which artillery is manufactured.

……

On the fifth day of the first month of the sixth year of Chongzhen, the Forbidden City, outside the Huangji Gate.

Under internal and external troubles, Chongzhen canceled the five-day holiday for civil and military officials, and changed it to a two-day holiday, only on the first and second days of the Lunar New Year.

Now there are not only civil and military officials standing outside the Huangji Gate, but also two big men with shining heads and braids, it is Ahsan and Turush, among which Ahsan's expression is very calm, and Turushh is like a crazy sick tiger, after being broken, his hands and feet have not yet healed, and his hands and feet have obviously been cuffed with thick iron chains, and he still looks fierce, staring viciously at Emperor Chongzhen and the surrounding Ming court officials who are sitting on the throne.

There were a few Han generals with golden melons in their hands, who were staring at Ahsan and Turushh without relenting, especially the latter, as soon as Turushi showed signs of getting up, he would go down with a golden gourd and beat the bright head into a rotten melon.

Thankfully, Tuloosh couldn't get up.

Chongzhen looked at the good news in his hand, his face was full of excitement and excitement.

He received a report and learned that a group of Jiannu and Tartars went south to the border wall of Koro, so he personally led several town guards in Datong Town to go out of the customs, and attacked head-on, killing two hundred enemies, including one hundred real slaves and one hundred Tartars.

Among the remaining three letters, one was reported by Liu Wenzhong, when he heard that Qinchuan led the troops out of the fortress to block the enemy, he led the army north to aid Qinchuan, and attacked the slave thieves on the side of the Qingshui River, killing two hundred enemies, including one hundred real slaves and one hundred Tartars.

The other letter was sent by the new Xu Dingchen in Shanxi, when he was investigating the evidence of Qinchuan in Lanxian County, he heard that Qinchuan was going north to block the enemy, and he expected that the other party would return dangerously, so he urgently ordered Shanxi to command Du Yingtang to lead the officials to the north to help, and broke the thief's anger with Qinchuan in the snake belly ditch, and beheaded two hundred and forty-eight enemies, including eighty-five real slaves and one hundred and sixty-three Tartars.

And the thieves were captured alive with the white flag of Merle Ezhen Ilgen Jue Luo Ashan, and the yellow flag armor Lae Zhen Ilgen Jue Luo Tu Lush.

The last letter was submitted by Qin Chuan, and the content was consistent with the content of Liu Wenzhong and Xu Dingchen's Errao Jiebao.

I have to say, Qin Chuan's words on this good news are very beautifully written.

The more Chongzhen watched, the more he was happy, and the more he watched, the more excited he became.

After reading the good news, he slapped the royal case and shouted "good" three times.

Then he strode down the Danqi and came a few steps away from Ahsan and Turush, and looked at them excitedly.

"Who is Ahsan and who is Turush?" Chongzhen, who was excited, pointed at the two and asked loudly.

Ah Shan kowtowed hard and said, "The general of the defeated army, Ilgen Jueluo Ashan, knock to see His Majesty the Emperor of the Ming Dynasty." ”

"So you're Ahsan."

Seeing that the other party was so respectful, Chongzhen became more and more excited.

"Your Majesty the Emperor, Ah Shan is willing to return to the Ming Dynasty, do his best for the Ming court, and die."

"Oh?"

Chongzhen was stunned.

The surrounding civil and military officials were also in an uproar.

Since the old slave rebelled, Da Ming has not captured alive a general with such a high rank of Houjin, let alone a general.

Now, Ah Shan opened his mouth to descend, which immediately made them excited.

After Turush, who was on the side, heard Ah Shan's words, he looked incredulous, and soon glared at Ah Shan angrily, and scolded him in Manchu.

The Han general beside him hurriedly found a strip of cloth to strangle his mouth, and then quieted down.

"Are you really willing to surrender?" Chongzhen asked excitedly again.

"Absolutely."

Ah Shan nodded without hesitation, and continued: "Don't hide it from Your Majesty, Ah Shan has twice led his clan to approach the border wall of the Ming Dynasty, wanting to serve the Ming Dynasty......"

Then, Ahsan told him how Daishan enslaved his people, how Amin shot his two sons, how Huang Taiji killed his younger brother Adahai and several nephews, and how he tried to defect to the Ming Dynasty twice but couldn't.

Chongzhen listened carefully, and when he heard the end, he shouted: "Okay! I named you as a five-grade cavalry captain, awarded General Wude, listened to the dispatch of the army, and then gave you three into the mansion, twenty horses of silk, and five hundred taels of silver. ”

"Your Majesty Emperor Xie."

Ahsan hurriedly fell to the ground and kowtowed heavily.

"Good, good, good, hahahaha......"

Chongzhen was in a good mood and strode up to Danqi and sat back on the throne.

No one in the civil and military affairs objected to this reward, but Qi Qi congratulated Chongzhen on winning another good general.

Chongzhen was full of smiles, lowered his head and thought for a moment, and then said: "Come on, I plan to reward Ninghua for guarding Qinchuan in the Thousand Households, and be named the captain of the four-rank cavalry, and award the general Xuanwu, and promote the general of Datong to the right road, and guard the ......."

"Your Majesty."

Liu Wenzhong, who was transporting the first rank back to Beijing, suddenly came out of work and interrupted Chongzhen's words.

Chongzhen's face stiffened, and he was a little unhappy.

"Your Majesty, Qin Chuan is young and vigorous, behaves Meng Lang, and has repeatedly collided with officials, and is not popular with the people in the area of Jingle Lan County, the minister thinks that although this son has miraculous achievements, it is not appropriate to be promoted several levels in a row, so as not to be impetuous, arrogant and reckless, it is better to temporarily promote Ninghua to guard thousands of households, and order him to assist in guarding Ningwu Pass, and it is not too late to give and reuse after more tempering."

Hearing Liu Wenzhong's words, Chongzhen frowned and thought for a moment, and finally nodded: "It makes sense." ”

……

On the sixth day of the first month of the sixth year of Chongzhen, the border wall of Xuanzhen, Zhangjiakou Fort.

A caravan of the Fan family, which had gone out of the customs to buy good horses a few years ago, came back in a mighty way, bringing back four hundred strong war horses.

The defenders of Zhangjiakou Fort, as usual, only roughly ordered the war horses, and then took a few heavy silver bags from the Fan family's steward with a smile.

No one noticed that the returning caravan had two hundred more people.

I didn't even notice that the two hundred people had rough faces, fierce eyes, and their palms were always on the hilt of the knife at their waists.

If one looked closely at these people, they would see that they were bare under their hats, around their ears and on the back of their necks.

If you uncover these hats, you will find that only a rat-tail-like braid hangs from the back of their shiny skull.