After a while, his subordinates brought pen, ink, paper, and inkstones.

Liang Yuzhou no longer had any worries, and took the pen and paper briskly.

He closed his eyes and carefully recalled the detailed maps of his past life.

As a military researcher, his greatest ability is to be first-class in memorizing maps.

When studying ancient warfare before, the bigwigs of the entire Academy of Military Sciences spent more than half a year drawing a map of ancient China, which was similar to the present.

What a shit chase home!

He clearly remembered that in that picture, where there were mountains and where there were rivers, it was all clear.

There are also secret passages, passes, various official roads, and common passages for surrounding forces...

Those details unfolded and magnified wirelessly in Liang Yuzhou's mind, making him can't help but laugh proudly.

"Rain boat! What are you doing? ”

"Alas!"

"You're drawing, redrawing the picture you drew for me!"

"The little boy is not in a good state today, or another day!"

……

All around is the sound of everyone arguing in small voices!

It turned out that Liang Yuzhou fell into a trance for a while, and almost half an hour passed, and the people around him thought he was stupid.

After recovering from the fugue, Liang Yuzhou understood what had just happened.

He spoke slowly:

"I'm sorry, guys, I just went to meditate on how to make a map, so I delayed the time!"

"It's good that the little boy is fine! You're tired of patrolling today, or you'll paint again tomorrow! ”

"It's all right, guys, and see how I draw a map!"

I saw that he picked up the pen and began to move, as if the pen was walking like a dragon and snake, and began to talk to himself:

"The first thing in drawing is to set the scale, that is, the fraction! If there is no division in the drawing, then you will not be able to distinguish the distance, let alone know the size of the area! ”

"The second is in the direction, the determination of the direction must be accurate, and the deviation of one or two percent is not allowed."

"The terrain is undulating, the slope is slow and rapid, and the direction of the mountains and rivers is very different from place to place."

"If there is only the determination of the direction, and there is no indication of the actual route and distance of the road, then there is no way to pass in the place separated by mountains and rivers."

"If, on the other hand, there are only markings of the route and distance, and there is no undulation of the ground and the shape of the straight course, the distance of the road must not correspond to its distance, and the direction will not be clear."

One of the lieutenants, visibly intrigued, stepped forward and took a closer look.

"Wow!" Then came an exclamation.

The others were also attracted by the cry and hurried forward to see what was going on.

"Little prince, your picture is so delicate!"

"All kinds of routes, river trends, all kinds of roads, at a glance!"

Ji Qinglin was also taken away from interest, but seeing that Liang Yuzhou hadn't finished painting, he was embarrassed to look at it.

Liang Du saw what was on his mind.

"Qinglin, let's go over and have a look!"

Ji Qinglin hurriedly stood up and said a few times: "Okay, good!" ”

He walked over to the table and saw a much larger map leaping onto the paper, and although it was not finished, the map was much more detailed and accurate than he had realized.

He couldn't help but admire: "Childe's picture is so fine and accurate, the old man and doctor have never seen it." ”

"Qinglin, you don't want to exaggerate like this, he won't raise his tail to the sky after hearing it! How can it be so exaggerated as you say! ”

The mouth said so, but the eyes were almost unable to take away, and the grin hung on the cheeks, and it did not go away.

This picture is much more detailed and accurate than the one he drew at home!

It made him feel unbelievable.

Ji Qinglin's eyes have been attracted by Liang Yuzhou's wanton brushwork, which is so silky, and it seems to be a river flowing down!

Looking at the flowing brushwork in his eyes, he couldn't help but praise with a strong compliment:

"I've never seen such a smooth drawing, he's so accurate, it's hard to say it's amazing!"

As the pen flowed, I saw him drop two words in an unexpected place: Huguan.

Ji Qinglin's eyebrows instantly became tight, and he hurriedly asked,

"Childe, where is your pot...... Yes...... Debatable, right? ”

Liang Du looked towards the place marked "Huguan" in the picture, and his face also darkened.

Liang Yuzhou stopped the pen in his hand, took a ruler and a compass, and explained:

"Most people who survey and map follow the path method."

Someone in the tent said,

Is there anything wrong with this law? The Qin army also uses this method, and it is not invincible! ”

Liang Yuzhou explained: "The roads are winding and winding, and the mountains and rivers are also high and low, and the error between the map measured by this method and the actual map is very large! ”

"It's not that exaggerated, is it?"

"As the saying goes, the difference on the map is one centimeter, but the actual difference is thousands of miles!"

"And how did you get this position?"

"Actually from the survey!" Liang Yuzhou replied casually.

His casual drawings today relied on the practice he had practiced day after day in his previous life, and they had almost become muscle memory!

That's why he has the confidence to say this today, although it is a lie, what he said is the truth, and their previous pot gate was indeed wrongly marked.

At this time, a person who was not long-sighted said: "A small pot pass, even if the previous marking is wrong, it will not affect anything, our task is to defend the north of Luoyang." ”

Ji Qinglin's face became gloomy, he had been worried about the garrison of Huguan before, but today he found that in the map he used before, Huguan was marked wrong!

After a long time, Liang Du's face turned cloudy and clear, and firm words came out of his mouth:

"The pot is very important!"

Liang Yuzhou added:

"Ladies and gentlemen, Huguan is high in the party, across Taihang, east of Zhongzhou, an ancient road through the east and west, integrating in-depth defense and three-dimensional defense, it is really a strategic place to control Taihang!"

Ji Qinglin hurriedly asked, "Who is the general of the Huguan garrison?" ”

"General Hui, Huguan is now led by Liu Xi!"

After hearing this, Liang Du couldn't help but worry for a while, and he hurriedly told Ji Qinglin:

"Then Liu Xi can be said to be the strongest defender of the city, you have to tell him again and again, just do your own defense of the city, don't worry about other things."

"Lord Wang, are you worried about his ......"

"I'm worried that the Huns will move the tiger away from the mountain and put the battlefield outside Huguan, and the garrison of Shanxi will not be enough!"

"The last general is also worried about this, and is preparing to ask the imperial court for reinforcements to Huguan!"

"Qinglin, in your opinion, who is the most suitable person to lead the troops to reinforcements?"

"If the prince insists on asking, then I only have one person to recommend!" Ji Qinglin said solemnly.

"Who?"

"Don't be surprised!"

"Mo? Mo Jingchun? Aren't you and him bitter enemies? What, you want to be nice to him in this way? Liang Du said with a smile.

"The prince is too worried! He and I just have different political views, he thinks that the treatment of the Hu people should be violently suppressed and completely eradicated, and I think it is necessary to pay equal attention to grace and power, and that's it. ”

"Hahaha! I'm kidding, what kind of person Qinglin is, I know it, don't take it to heart. ”

"Ladies and gentlemen, my diagram is complete. Check it out! ”

Looking at this magnificent map, Ji Qinglin couldn't help but admire:

"Lord Wang, I have to admit that this son of yours is much better than you, and in time, it will be the Great Wall of my beam!"

"Qinglin, you praise him again! His tail is almost up to the sky! ”

……