I wasn't allowed to go to her room, but she came to my room so easily.

Realizing Zhang Yang's eyes, Li Yue avoided it weakly, "Seeing that your room hasn't been cleaned up for a long time, I'll go clean up, who knows there are so many drawings."

Li Yue whispered, "What is this thing for?"

"I don't need this thing yet, and I don't have the algorithm and latitude and longitude to do it."

"And what is it used for?"

Zhang Yang patiently explained: "This thing is very powerful, if you get lost in one place, you can use this thing to look at the sun and the horizon, and you can know where you are by comparing the longitude and latitude of the map with a formula."

"Is the compass the same thing that my husband said before?"

Zhang Yang shook his head, "The use is different, of course, the use of the sextant is also inseparable from the compass."

Li Yue frowned and thought.

Seeing that she was trying to understand, Zhang Yang said in a low voice: "This requires a formula, and it also needs latitude and longitude to be useful, remember I told you that the world is a ball."

"Well, my husband said that he made a model."

"What about the model?" Zhang Yang looked around.

Li Yue pursed her lips and smiled, "Hang my clothes."

Taking out a piece of paper, Zhang Yang explained while drawing a pen: "The meridians connect the north and south poles, the parallels are connected with the meridians, and the meridians and parallels are in order for us to determine the position and direction on the earth, so we can first determine the meridians, and our position on the ball can be determined by the intersection of the latitude and longitude."

"And how do we know where we are?"

Zhang Yang smiled suddenly: "Cut the earth along the longitude of 20 degrees west and 160 degrees of east longitude, and the hemisphere from 20 west longitude to east to 160 east longitude is called the eastern hemisphere, and the hemisphere to the west is called the western hemisphere, so that the reference value of latitude and longitude can be understood......

Patiently telling her that this knowledge would affect the way she perceives the world.

"I'm going to teach this to our children in the future." Li Yue's pretty face was smiling.

Zhang Yang put his arm around her shoulders and sighed, "Because only the two of us in this world have the same way of knowing the world, and this way is different for them."

Li Yue smelled the smell of her husband's body, "But from a distance, you can see the flag first, and then you can see the soldiers and horses."

"It's hard to change everyone's opinion, and it's even harder for everyone to understand our opinion," Zhang said.

Li Yue's gaze looked at the latitude and longitude chart again, "It's difficult to calculate other latitudes and longitudes."

Zhang Yang smiled and didn't answer, looking at his daughter-in-law's gaze again, she seemed to have a new goal.

Stroking Li Yue's smooth long hair, it seems natural to take advantage of his daughter-in-law, this feeling is very strange, Zhang Yang whispered: "King Wei's Kuodi Chronicles can only be measured by footsteps, and this latitude and longitude allows you to see the whole world."

The couple unconsciously lowered their voices, and this knowledge is the biggest secret between the two.

When people are still understanding the origin of the four seasons of the year, the change of day and night, Li Yue has tried to understand the world, and by putting her vision on the whole earth, she can see the mysteries of the world and see the vision that others can't see.

It's a cognitive gap, and it's a huge chasm, and the way of knowing is like a huge wall in front of their eyes, and people struggle to know what's behind the wall. ….

Peek into the truth behind the wall, there must be another world.

There are also people who spend their lives discovering some clues, and this is only a few.

Li Yue can raise the weapon of cognition and smash this wall, and in front of her is the whole world.

Li Yue said in a low voice: "The army is marching outside, most of them rely on experience and guides to discern the direction and location, and there are also large armies that can't find the direction when they go deep into the desert, I have read some war classics in Guozijian."

Zhang Yang nodded solemnly, "You can conquer a place with brute force and rule a place, but if you can understand the laws of nature before everyone else, and then use this law to achieve large-scale destruction, then you are nothing in the world."

One of the enemies."

Li Yue grinned and said, "Does the husband want to be that kind of person?"

"Your thoughts are dangerous."

"How dangerous?"

"You want your husband to be a butcher."

"How can a husband be a butcher?"

Zhang Yang shook the fan in his hand, "You just tell me to rebel, the whole world is ours."

Li Yue covered her mouth and chuckled, "I didn't say that."

"That's what you mean."

Li Yue struggled to avoid Zhang Yang's clutches and fled into his room.

Other things are easy to make, the production of a sextant is too difficult, not to mention how to make high-quality lenses, in which the manufacturing accuracy can torture people crazy.

The autumn hunt was over, and Li Shimin returned to Chang'an City to be busy with government affairs, and Wei Zheng was standing on the side.

Now Li Shimin is very annoyed in his heart, and he is annoyed that things left Wei Zheng in Xuanwumen at that time.

This Wei Zheng has to take care of everything, and this time the autumn hunt was almost scolded back by Wei Zheng.

It's so hard to be a Mingjun......

"Your Majesty sighs." Wei Zheng, who was explaining the affairs of the DPRK and China, was puzzled.

Li Shimin said with a straight face: "I regret it, how much people's power and how much grain and straw have been wasted in this autumn hunt, and I have made mistakes."

Wei Zheng nodded, "Your Majesty can have this understanding, and the world is fortunate."

After a short time, Li Tai walked into the hall, and in addition to Li Shimin and Wei Zheng, there were three or two eunuchs in the palace.

First, Li Tai saluted and said, "Father, the son has drawn a picture."

With that, he handed the diagram over.

Li Shimin took the picture, looked at the dense lines on it, and said without frowning; "What is this picture?"

Li Tai explained: "Father, this is a contour map, these dense curves are the topography, when the distance between these curves is smaller, the denser the arrangement, the greater the slope, and the thinner the arrangement, the smaller the slope."

Hearing Li Tai say this, Li Shimin observed carefully, "This mountain is ......"

"Father, this is the mountain of Lishan."

"I see it." Li Shimin looked up at his son, "Why are you painting this?"

"Father, this picture is very useful." Li Tai arched his hand and said: "The march and battle do not need to look for the terrain, look at the terrain, the terrain of the two armies has a great impact, if the soldiers have this map in their hands, they can understand where the terrain is dangerous, in the original map is the mountain is the mountain, is the water is the water, but do not understand the direction of the water, do not understand the terrain."

Li Shimin closed his eyes and rubbed his eyebrows, "You mean the topography map of mountains and rivers?"

Wei Zheng stroked his beard and said: "Lao Chen has also seen similar pictures in the classics, which should be the classics of the Han Dynasty, but there is no detail in the hands of King Wei." ….

Li Shimin, who has many years of experience in marching and fighting wars, naturally understands the value of this kind of map, and taking advantage of the terrain to take the lead is a major factor in determining victory or defeat.

Li Tai bowed down and said, "Father, you can arrange for people in the military department to learn to draw this map, and it will be of great use in promoting the army in the future."

Li Shimin's eyes were a little more gloomy, "This is what you came up with?"

"Erchen ......" Li Tai took a deep breath and gritted his teeth, "Back to my father, it was just Zhang Yang's guidance."

"It's him again!" Li Shimin snorted coldly.

Wei Zheng bowed and said, "Your Majesty, Zhang Yang's life is not bad, and he is also a pure person, but he neglects to teach."

Li Shimin put away this picture, "I have already asked Zou Guogong to teach."

Wei Zheng said in a low voice: "Your Majesty, the minister heard that Zhang Yang loves to read, this person is also knowledgeable, the position of Chao Yilang is still vacant, and there is a lack of people to sort out the classics.

Li Tai was stunned in place, Chao Yilang was a civil and prose official, an official position with no real power, and he was very surprised when Wei Zheng appreciated Zhang Yang so much.

Li Shimin said in an urn voice, "I will consider it."

At this moment, Zhang Yang was still cleaning up the village, and after the autumn hunt, the shops on the edge of the village were in a mess, as if they had been ransacked by bandits.

Ding Xi and He Bi looked at a pile of silver coins with a smile, this is their profit, and the two of them are sixty yuan each.

Zhang Yang calculated that after all the profits were divided, there would be 800 yuan left in his hands.

Why bother swinging his knife, "Brother Zhang, you are a person who can make a lot of money, I didn't mistake you at the beginning."

Ding Xi smiled innocently, "I will be satisfied to be able to get a piece of the pie behind Brother Xiao Zhang."

Ding Xi is honest and honest, and he is a contented person

Why bother living more freely, and now he is still working in the store, maybe one day he will leave.

The three of them have gone from a small shop to the present, and they have a lot of money in the past two years.

There are many soldiers next to the hospital who are coming here to see a doctor, their large and small wounds are still dirty, more and more people come here to see a doctor and see an injury, Sun Simiao has planned to recruit some more doctors, and now the small hospital is on the right track.

"You've all cleaned your wounds and come back." Sun Simiao scolded angrily.

Most of the officers and men in the army have a very poor sense of hygiene, and they don't know how often they take a bath, and they also have all kinds of strange smells on their bodies.

Sun Simiao's tantrum is justified, if the wound is not cleaned, infection will occur, it will be troublesome to deal with, and it will also die.

Just looking at it was unbearable, Zhang Yang also saw that someone's hair was clumped, and they shivered and saw fat fleas fall to the ground.

Zhang Yang said to Shangguan Yi: "Set up a few big buckets at the entrance of the village, and in the future, all the officers and soldiers in the army will come here to see a doctor, they will scald me with hot water, wash them, and burn all the fleas on my body before I can come in."

Shangguan Yi received the words and went to arrange.

These officers and soldiers, who have almost no sense of hygiene, will have a serious problem if they bring their illness to other people in the hospital. ….

Shangguan Yi's organizational ability is getting stronger and stronger, and the villagers don't treat him as an outsider, and even his status is equivalent to Niu Chuang, who has always presided over affairs in the village.

Buckets of hot water were poured on them, and these officers and men were asked to take off their clothes and jump into the boiling water one by one to wash themselves before they could go to the post house to see a doctor.

When people are washed, they don't want those dirty clothes.

simply entered the medical hall and left barely.

Zhang Yang raised his head and sighed, the folk customs of the Tang Dynasty were really wild, "Brother Shangguan."

Shangguan Yi replied, "What else does Zhang Shilang have to say?"

"Find some clean cloth for them, and let them cover their immorality."

"Why?"

"Wait." Shouting to stop Shangguan Yi, who was going to run an errand, Zhang Yang instructed, "Just use the clean old linen cloth in the village, don't be too expensive."

"That's the arrangement."

They finally had a cloth in their way......

Zhang Yang walked back to the village, Li Yue still stuck to his wife as usual, shushing and chatting.

"Look at you, you bring so many things every time you come, and the salted pork and salted duck eggs you brought last time haven't been eaten until now, so don't bring them next time." The wife took Li Yue's hand and said.

glanced at Zhang Gongjin, who was playing chess with Li Yuan.

At this moment, Li Yuan's expression was solemn, and the situation on the chessboard was grim.

Zhang Gongjin glanced up, "What are you busy with these days?"

"These days I study at home."

"What knowledge?"

"It is a kind of knowledge to look at the sky and discern the direction and position." Zhang Yang held his hands and looked into the distance.

"Look at the sky and distinguish the position, are you a good person?"

"That's right, teacher."

Zhang Gongjin moved the chess pieces, "This kind of miscellaneous science should be studied less, you should read more sage classics, that will be useful to you."

"Recently, the books I read in Guozi are quite messy, so I have these feelings, sometimes the content of some books

It gave me a lot of clues."

Li Yuan looked at the situation on the chessboard, "The person who went to the palace to buy clothes for me came back today, and there was news from the palace that His Majesty was planning to seal you again, and he was already on his way."

Zhang Gongjin squinted and looked into the distance, "Isn't this coming?"

Following the teacher's gaze, a team of soldiers and horses was indeed heading here.

When the visitor arrived, he found out that it was Qin Qiong.

Qin Qiong wore a hood and wrapped her head with a folded scarf.

A round-necked robe looks no different from an ordinary person at first glance, and if you don't know the general, you think it's an ordinary martial artist who came out of the Wei Mansion.

Turning over and dismounting, Qin Qiong shouted, "Zhang Yang! Listen!"

Walking forward, Zhang Yang bowed and was about to listen, but saw that Qin Qiong stopped speaking again.

Straighten up again, looking at him suspiciously.

Qin Qiong kept silent, pacing back and forth for a while before he spoke, "Wei Zheng recommended that you return to the court to become the secretary and superintendent of the court."

"I ......"

"Don't talk yet." Qin Qiong took a deep breath, "The old man heard that you have a good medicine in your hand to heal injuries, but is there such a thing?"

"Don't hide it from the general, I do have this medicine in my hand, I call it gold sore medicine, it is a good medicinal material to promote blood circulation and dispel blood stasis and remove saprophytic muscles."

"The medicine for wounds is the medicine for wounds, what kind of medicine for gold sores, this is not a good name."

"I think it's good down here."

Qin Qiong simply found a clean stone and sat down, "Originally, the eunuch of the court came to announce the decree, but was stopped by the old man."

"The general is arrogant, His Majesty's edict eunuch, you will stop it if you say it, you really dare to think and dare to do it." Zhang Yang arched his hand and said, "I admire it."

"For the sake of thousands of soldiers seeking medicine, a eunuch who passed the decree stopped him, and the old man could afford it."

"The general did not hesitate to offend His Majesty when he asked for medicine for the soldiers, but it was really righteous and cloudy, and he worshiped him below."

Qin Qiong's breathing was heavy, and she was afraid that she was very anxious when she came.

Knowing what he meant, Zhang Yang nodded slightly, "The general wants me to give the medicine to the army?"

Zhang Wei