In the third year of Jian'an, the Central Plains and the south became more and more lively, and Tongyuan's side officially began to move north.

However, the prelude to the war turned out to be in the winter of the previous year, in the battle with the traitors.

After Tong Yuan re-planned, the location of Shangjun was changed to Yulin City as the center in the later generations, and it became an important and developed county in the western part of Bingzhou.

In addition to repairing the Great Wall left over from the Qin and Han dynasties, Zhang Ji, Shen Long, and Yu Poison built a number of new fortresses, outposts, and roads.

Since there are only 20,000 military camps and less than 10,000 Hu tribes in the entire county, under effective management, it will not exceed the environmental carrying capacity of the region.

Tong Yuan, Zhang Ji, Su Ze and others encouraged Juntun to cherish water sources and use carbonstone, that is, coal, as fuel under appropriate circumstances, rather than cutting down trees.

Whichever tun protects the grass and trees better, and at the same time the agriculture and animal husbandry can also develop well, there will be rewards and promotions.

However, in Hetao Shuofang County, north of Shang County, a desert about the size of two or three counties has appeared.

At this time, there was no official name, and it was generally called the Hetao Desert. In the later Northern and Southern Dynasties to the Tang Dynasty, the scale gradually expanded, and it was called Kujiesha, and later called Kubuqi Desert.

In response to this situation, Zhang has controlled the number and concentration of herds in several parts of the state, planting alfalfa both as fodder and as a way to prevent desertification.

And according to Tong Yuan's suggestion, the development of the whole region attaches great importance to the protection of water sources. For example, it is forbidden to reclaim fields in limited forest areas, and to build underground qanats in areas where water consumption is concentrated.

Later, Tong Yuan asked Zhang to try to grow grapes, melons, courgettes, etc. in some of the tuntians, and after receiving good results, he actually let the people of Bingzhou Tuntian eat a diet similar to that of later generations.

Zhang also absorbed the opinions of the grassroots residents and officials, avoided being too rigid, and asked them to improve the utilization rate of water according to the conditions of various places.

Under proper development, the roads in Shangjun have been opened, the water source is used efficiently, and the 200,000 livestock are reasonably divided, and they should be fully prepared, so that the dreadnought army and the 10,000-strong Tuntian army can give full play to the best results. However, due to the problem of water and supply, it is not suitable for an army of more than 50,000 to be stationed in battle.

Tong Yuan's previous plan was also to use part of the dreadnought army plus about 10,000 Tuntian troops to recover more lost land, instead of using up the large amount of materials accumulated to give Cao Cao behind him a chance to sneak attack him.

He handed over the outpost battle before the spring of the next year to Zhang Ji and others with full responsibility, and when spring came, he would lead the dreadnought army to the north to fulfill his promise to recover the state and revitalize the northern Xinjiang.

In the autumn of the second year of Jian'an, the Huns disguised themselves as caravans with specially selected non-Xiongnu henchmen, as well as Han slaves who had made meritorious contributions, and infiltrated Shangjun and other places to explore roads and intelligence.

The old slave who sacrificed the strategy of the fire ox array last time has been incorporated into Mintun because he is familiar with the nearby geography. But for some reason, he doesn't seem to be interested in the new good days, and he is always in the habit of contacting the lazy and lazy people.

A caravan of more than ten people of all kinds of Han and Hu people, with dozens of good horses, as well as sesame, walnuts, garlic and other special goods, entered the territory of Shangjun, and came to connect with this old slave and others.

Walking along the stone road through a section of the Great Wall and fortresses, outposts, and beacon towers, they were all surprised by the Han Chinese defense.

Two years ago, it was obviously a barren place, not to mention the stone roads, even the dirt roads were full of potholes, and without a guide, it was impossible to figure out the east, west, north and south. But now, it's really well-equipped and orderly.

They arrived at a market twenty miles north of the city, which was said to be near a military camp, and was estimated to be a convenient and important place, so they would write it down in the future and burn it for a purpose.

Because the Xinxi Liang army took measures to isolate the Xiongnu and welcome other friendly forces to come to do business, their group was not prevented from entering.

The market was crowded with people, and soon two thin Han Chinese men came to their stalls to talk about the horse business.

Under their cover, another plain-looking, ordinary-looking old man joined the caravan leader, and they tasted sesame seeds while carefully communicating.

The Qiang-looking leader asked, "Old man He, how are you doing now?" ”

The old slave said, "Oh, now I have to work every day, and if I do it slowly, I may be blown away." ”

The leader smiled and asked, "Isn't it good to have a full stomach while working?" ”

The old slave hurriedly said, "What's good, it can't be like in the past, after we make meritorious contributions, we can drive others to work, and let those who look down on us suffer." Now, even those who have done great deeds are like slaves, who have to farm and herd sheep! ”

The leader said, "Be quiet, don't let anyone hear." ”

The old slave looked left and right, and someone was passing by, so he suddenly said that some sesame seeds were not of very good quality, and they should be cheaper.

Seeing that there was no one around, the leader said, "This child thief is young, and he doesn't know how much food people want to eat, but hopes that one day he will not have to do anything, but just drive the people he hates to be happy." ”

The old slave replied, "Yes, don't we have to climb on the heads of others to have a head, the child thief cut off my way, and we will invite the kings of the Huns to be the masters." ”

He suddenly asked, "Hey, how is my family now?" Is there a life that drives others because I am trying to deliver the message. ”

The leader looked to the upper right and said calmly, "They are all very good, and there are not as many livestock as mine, but they are also well mixed." ”

The old slave asked, "Did you give me anything then?" ”

The leader said, "Of course not."

He thought something was wrong, adding, "They don't know what you're going to do." All I can do is tell you what they look like now......"

When the old slave heard that it was indeed his family, there was nothing wrong with their appearance and preferences. He felt that he was in a dark day, longing for life under the rule of the Huns, and he was more and more desperate to work for the Huns.

The leader smiled obscenely in his heart, of course there could be no mistake, he had just dragged her granddaughter into the tent last month, and now he could not tell which of his subordinates was, and the rest of the men were stammering him every day, begging for more cattle and horses.

After he finished the introduction, he said, "Okay, you can meet them next year, so let's tell me what you know first." ”

This old slave knew everything, and introduced the situation of the tuntian fields and roads in the area of Luyanshui one by one. The more the leader listened, the more frightened he became, judging from all aspects, the strength of the Xinxi Liang Army was not bad, and it sounded like there was only one defect in numbers.

After it was over, he asked Old Man He to leave quickly, except for coming to the market to trade as agreed, everything else was normal, and he must not show his feet.