The radius of the second circle is 20 meters, which is not a fully enclosed space, and Yichen plans to build a 2-meter-high wall around this circle, and then set up a defensive barrier on the wall.

The area of the ring outside the first circle in the second circle is the living area of Yichen and others, and the caravan is not allowed to enter in peacetime, but in wartime, the caravan is allowed to enter the living area after being inspected to take refuge.

The radius of the third circle is about 100 meters, and Yichen selects dozens of points around this circle, and through these points, an enchantment is arranged to expand his perception. This barrier has no defense or attack, and its only use is perception.

The area of the ring inside the third circle and outside the second circle is also the caravan's activity area, and there is a sign on the outermost part of this area, which does not allow ninjas from other countries to enter.

There are three passages outside these three circles, and traps will be placed outside the three passages. Of course, this is a defense placed in the open, and Yichen will tell all caravans not to enter these areas.

However, it doesn't take too many ninjas to build a supply station, and Yichen has made arrangements for a shift change at the supply station that has not yet started construction. Yichen's arrangement is like this, after everyone escorts the caravan back to the land of earth, there will be a period of free time when the caravan sets off again, and this time is everyone's holiday.

It's just that some caravans are far away from Iwa Ninja Village, so the escort team has no rest, and Yichen can only take turns arranging for everyone to pick up some caravans closer to the village from time to time.

In addition, Yichen opened up a trade road, and which way to take was prescribed by Yichen, so the routes of most caravans were similar, and there was no need for each caravan to be equipped with a squad, so most of the time Yichen's subordinate mid-ninja team was free, so Yichen could also arrange additional rest time.

After arranging the shift change this time, six teams immediately returned to the village to rest, and after resting for different times, they would return to the supply depot one after another to replace the teams on duty.

The reason why there will be 6 squads going back is because now the caravan happens to be in the Land of Rain, and there is no need for so many people to carry out the mission in a short time.

Yichen then got in touch with two nearby outposts, and according to the rules of Iwa Ninja Village, both sides are of the same level, and when one side comes to the rescue, they must provide support. Therefore, Yichen needs to get in touch with the outpost as soon as possible, not only for the sake of safety, but also so that there will be no disputes in the execution of the mission in the future.

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After dealing with these things, Yichen began the construction of the supply station, the construction of the supply station started from the outside, and the people from the logistics department who had transported the supplies before had already gone back with the six teams that had returned to the village. All Yichen could command was the members of his 7th squad and the remaining four mid-ninja squads.

These four shinobi squads include the Stygian Squad, the Shinohara Squad, a good trap squad, and a medical ninja led squad. The ninja who is good at setting up traps is called Inagaki Goichi, and Yichen tells him and Sunny about the idea of setting traps on the periphery, and asks the two of them to think about how to set up the traps.

Yichen then arranged for the rest of the people to build the signage for the third circle and the wall for the second circle. Yichen himself, on the other hand, needs to spend his time on the perception barrier in the third circle and the defensive barrier in the second circle of walls.

As for the innermost core building, Yichen is not in a hurry, this will not be built until the wall is erected. After all, this core building is also secret to the caravan, and Yichen doesn't want outsiders to know the layout inside.

However, such a large supply depot cannot be built in a day or two. The main energy of Yichen and the others is still used in cultivation, but they will carry out some construction in addition to practice. It took half a year to be able to complete the construction of this supply station, and Yichen felt satisfied.

Early the next morning, Yichen first carried out physical training and B-level sword practice according to his habit, and then found the dark light and began to ask for advice on the cultivation of fire attributes.

The dark light has only only recently comprehended the change in the nature of the fire attribute, and due to the lack of contribution, it has not been exchanged for the fire escape ninjutsu. Therefore, the understanding of Huo Dun is not very thorough, but this is better, the two have similar perceptions, and the communication is smoother. While practicing, the dark light taught Yichen the characteristics of the fire attribute that he understood.

Yichen listened and felt, and asked questions from time to time. The effect of the communication between the two is quite good, both have gained, and the harvest of the dark light seems to be greater than that of Yichen. Yichen's strange thoughts made the Stygian feel suddenly enlightened from time to time, and the Stygian felt that after communicating in the morning, his understanding of the fire attribute had deepened a lot.

This can also be seen from the progress of his cultivation of Huo Dun, which was originally expected to take a few days to make some progress, but in one morning, there was a prototype.

Watching the dark light spit out a mini fireball the size of a blue ball from his mouth, Yichen was a little envious.

However, Yichen's harvest is not small, Yichen is now at the border, and he doesn't dare to consume chakra to practice fire escape, there was no way to practice, he could only slowly increase his understanding, but under the guidance of the dark light, coupled with watching the dark light progress little by little, Yichen's comprehension of the fire attribute has also improved a lot.

Now the fire attribute chakra in Yichen's body is also active a lot, and more fire attributes have been detached from the original balance. So after a morning, Yichen was already able to use the original chakra to spit out a few sparks.

Yichen was excited to feel the progress and decided to continue practicing tomorrow.

All morning, everyone was practicing, and in the afternoon, some time was taken out to build, although it was not long, but the efficiency of the ninja was not comparable to that of ordinary people, and the supply station slowly began to take shape.

The days of this kind of cultivation usually passed quickly, and within a few days, the first caravan had returned from the Land of Rain, this caravan did not go deep into the Land of Rain, but only traded not far from the border. After perceiving it and confirming that there was no problem, Yichen didn't pay much attention to it after arranging for Shinohara and them to escort him.

In the next few days, seven or eight more caravans returned one after another, and Yichen sent out the team of Stygian, Inagaki Goichi, and the medical team of Shinobi Hosokawa. Fortunately, the general direction of these caravans was the same, and there was no need for each caravan to send a squad to escort them.

In this way, only the 7th squad is left at the supply station, if another caravan returns, and the team that has returned to the village for vacation has not returned, then Yichen will have to arrange for the caravan to stay at the supply station for a while.

But fortunately, the anti-village vacation team began to return one after another, and the task of Shangdao slowly got on the right track, and Yichen's life became regular, and now Yichen's range of activities is basically near the supply station, except for practicing not far away, Yichen generally does not leave the supply station.

And the Akatsuki organization in the country of rain on the other side is also on the right track in opening up the trade route, and the Xiao organization may have received strong support from the daimyo, and the ninjas who escort the trade route each time are at least twice as many as Yichen's side. Yichen guessed that it might be that the daimyo really got a lot of benefits from it.

The business affairs just need to go down step by step, and there are not many things that Yichen needs to intervene in. Next, it's time for another task. When Yichen accepted the task of opening up trade routes and building supply depots, he also had a mission to take over the information of the Land of Rain and cause chaos in Konoha.

Yichen couldn't leave the supply depot casually, so he arranged for Fu to quietly go to the Land of Rain and get in touch with various intelligence officers in the Land of Rain.

It's just that the information brought back by Fu is not of much value, and what these people know, Yichen can guess from the plot of the original book.

Since there was no movement, Na Yichen was not in a hurry, and waited at the border with peace of mind, but regularly sent talismans into the Land of Rain to get information.

It's just that Yichen didn't expect that this wait would be two years.

……

Two years have passed, the supply station has already been built, and now the trade routes between the rain and the earth have spread throughout the ninja world, and everyone understands that after removing tariffs, commerce and trade can flourish to this extent?

The trade route opened by Yichen and the Akatsuki organization stretched from the seaside on the other side of the land to the junction of the land of rain and sand.

The caravans that traveled on this trade route were estimated to be about seventy or eighty. In addition to the caravans of the two countries of earth and rain, there were also caravans from other small countries. For example, the country of bears, the country of ghosts, the country of birds, the country of grass, the country of taki, and the country of iron on the edge of the land country all have caravans among them.

Originally, their caravan was going to a distant country, because they had to pass through many countries on the way, and they had to pay a lot of customs duties, but they didn't need tariffs when they transited through the land country, because after seeing the booming trade between the two countries, Onoki had already persuaded the Daimyo of the land country to cancel all customs duties.

First, because the country of land is free of tariffs, and secondly, in order to protect the safety of the trade route, Iwashinobi Village has made great efforts to clean up the bandits in the territory in the past two years.

Now there is not a single traitor in the land country, at least the caravans in most areas can be relieved without ninja guards.

Therefore, as long as you go to the land of the earth, you can save a lot of costs, and this kind of thing is already the consensus of all caravans in the entire ninja world.

Some caravans that are far away from the land of the earth, when looking for guards, usually post a mission like this, let the ninja escort the caravan to the border of the land of the earth, and then after the end of the transaction, then issue a mission in the country of the earth, let the ninja escort them back to their original place from the border.

The prosperity of commerce and trade has brought great benefits to the economy of the land country, and now the tax revenue of the daimyo of the land country has not decreased due to the lack of tariffs, but has increased a lot, and this development momentum is even more catching up with the country of fire.

It's just that the Iwa Ninja Village hasn't completely opened up a second trade route yet, after all, there are no such idealists in other countries.

However, Yichen heard that the Daimyo of the Land Country and Onoki were sending people to negotiate with the surrounding small countries, and it was estimated that it would not be long before the 2nd and 3rd trade routes would appear.

But these things have little to do with Yichen, Yichen, who has been sitting in the supply station for two years, is about to usher in a harvest, and Yichen's 7th team has only returned to Iwa Ninja Village three times in the past two years.

The three of them can also take turns to go out for a walk from time to time. Yichen could only leave after obtaining the approval of the village, after the temporary commander arranged by the village arrived at the supply depot.

It can be said that it is really about to suffocate Yichen to death.