Looking at the shipbuilding skills in the backpack, Zhang Yuan's mood really couldn't get better.

But if he travels fifty years late, maybe this thing can really play a big role, and if he really puts it in the world of Zhongxing, he spent most of his national strength to make some lucky boats, the so-called Zheng He treasure ships, to teach those savages in the southwest what civilization is, Zhang Yuan is still very willing.

It's just that the big Han under Liu Che's rule can't do it, at least not now.

If it was really when Wei Qing expelled the Xiongnu to Mobei, and even the entire desert could not see the Huns, at that time, the treasury of the Han Dynasty was still sufficient, and Zhang Yuan might really take out this shipbuilding technique to fool Liu Che into developing and developing on the islands in the east.

You must know that the Han Dynasty is very short of slaves, and if the east is not enough, then go around a long way, from the coast of the sea to a certain awl-shaped continent in the southwest to organize some labor.

As long as there are ships in this year, the survival rate of sea voyages is definitely much higher than that of walking by land.

After taking back the fugue's thoughts, Zhang Yuan stopped thinking about these things.

To be honest, even a ship can't get to the island to the east, and it's still okay to sail along the edge of the land, unless the system gives him another monsoon map.

Thinking of this, Zhang Yuan immediately stopped, if the next random reward was really a monsoon map, then Zhang Yuan would probably die of depression.

Staring at the last question mark tightly, Zhang Yuan's mind moved, and then he clicked to confirm.

The system interface flickered again, and the ten seconds seemed like a century long.

...

"Congratulations to the host for obtaining a map of the Northern Frontier!"

may have sensed what Zhang Yuan was thinking, and added an exclamation point to the pop-up interface.

What Zhang Yuan wanted was a map, a map that included all the maps north of the first line of the Huai River in the Qinling Mountains.

What is Dahan most famous for in Zhang Yuan?

It's not Wei Qinghuo's illness, it's not Liu Che, it's not Liu Bang, it's not Han Gaozu Liu Bang, it's not the women whose political acumen are many times stronger than men.

In Zhang Yuan's opinion, the most unlucky thing thing for the big man is that group of lost generals.

It's not one or two, it's a special group!

The reason why Huo Quzhi and Wei Qing are described as heavenly favorites is completely based on the foil of that group of lost generals.

The Han army is far superior to the Huns, the front is tough, and the Huns can be cleaned up casually, especially over the years, the equipment of the Han army has been upgraded.

The Huns were still in the Maudun era, and the level of equipment was still in that era, but the internal control was one or two levels lower.

Mao Dunna really said the same thing within the Huns, but the current Hun Dadan Yu Junchen actually has a lot of voices opposing him internally, and a bunch of people are staring at his position.

Otherwise, when the last military minister dies, it will not be his younger brother who will inherit his position.

Therefore, according to the current situation, as long as the generals of the Han Dynasty do not get lost, they will definitely be able to greatly shorten the war against the Huns.

As for whether the restless Liu Che will bully others after the battle against the Xiongnu is over, it is not something that Zhang Yuan can know, although he can simply guess the possibility of fighting other nationalities after fighting the Xiongnu is as high as 90%.

With this map, Zhang Yuan was able to open a new discipline in Taixue.

And it's a talent that can be directly placed in the military.

Able to go out with a large army and can distinguish the direction clearly, so as to determine their own position, and if they are good, they can even determine the location of the enemy.

Zhang Yuan not only hopes to cultivate some talents who can read maps, but also needs to cultivate talents similar to satellite navigation.

The Huns are not traceless, only Zhang Yuan knows a little.

In order to have sufficient heating in winter, and to maintain the warmth of the cattle and sheep so that they do not freeze to death, a kind of 'landmark' will appear on the grassland.

Sheep plate!

In fact, it is a dung heap for cattle and sheep.

The Huns would leave a large number of sheep trays in various places where there were water and grass.

It can be used in the winter, it is not exclusive to each tribe, even if it is not made by your own tribe, you can take it in the winter.

And where these trays are piled up, the grass will grow better in the spring of the next year than elsewhere.

In this way, the Xiongnu tribe could stay in one place for two seasons without worrying about not having forage to feed their cattle and sheep.

But this is when all is peaceful, and when war comes, the enemy can judge how long a place has been inhabited by the Xiongnu tribe by the sheep's plate.

It was even possible to create a large number of sheep trays like the Huns, and lay a trap in one place, so that when spring came, the army could go north and directly attack the Xiongnu tribes grazing in the local area.

What Zhang Yuan wanted was this kind of effect, a navigation that could guide the army.

got the objects he needed in his heart, and Zhang Yuan couldn't wait to manifest them.

A sheepskin scroll appeared out of thin air on the table in front of him, but this scroll was spliced, and each sheepskin was sewn with needles and threads.

The sewing location is also the location of the mountain range, so it is not obstructed to see it.

The map is very detailed, and the locations of the rivers, mountains, and cities are all clearly marked.

From the Qinling Mountains to the Huai River, it extends north to the North Sea, that is, Lake Baikal, to the west, to the Lan city of the Dayueshi, to the east to Sakhalin Island, and even Honshu Island.

Two-thirds of the area on the map is unknown to the Great Han.

The lower part of the Western Regions is the Qinghai-Tibet Plateau, and at this time, if Liu Che wants to go to the Qinghai-Tibet Plateau to find out, he will basically let people die.

At this time, the Qiang people on the Qinghai-Tibet Plateau lived only near the Brahmaputra River, where the temperature and climate were more suitable for people's survival.

The countries in the Western Regions are not worth worrying about, and the nomads in the east of the Xiongnu and the small countries on the Korean Peninsula are not worth mentioning.

As long as these nation-states cleaned up the Huns, they would send people to bow to the Han the next day they knew the news.

The islands of the Japanese are really a little troublesome, Liu Che said in front of Zhang Yuan that he didn't believe in gods and ghosts, and Zhang Yuan directly scoffed at his statement.

As soon as this map was exposed, it is estimated that the first to go crazy was not those soldiers, nor the courtiers of the Han Dynasty, but Liu Che and those monks.

Isn't this an island inhabited by immortals in the East China Sea?

In order to prevent this from happening, Zhang Yuan took out the stainless steel dagger that had accompanied him for several years from under his pillow and began to divide it on the sheepskin map scroll.

The countries of the Western Regions can be retained, the boundaries of the Xiongnu can be retained, and the eastward can only reach the Korean Peninsula at most.

Such a map is the limit that Dahan can withstand now.