I was engaged in infrastructure construction in the Han Dynasty [Transmigration Book]

If it was in later generations, he would probably have understood Liu Tan's plan when he heard those four words, but Kai Guan was very unfamiliar with this, so he couldn't figure out what the meaning of these four words was.

Liu Tan didn't care whether he understood or not, so he asked people to take Kai Guan down to deal with a bunch of follow-up matters, and investigate his family situation. Anyway, his parents would take over, and if there were underage brothers and sisters, they would also take over.

Kai Guan looks like he is in his twenties now. According to the national conditions, he should be married, but it’s hard to say, the poll tax for big men is only for women. Women over the age of 15 will be charged five times the poll tax if they don’t get married. Men don’t There is no such regulation.

If there are wives and children, they must be brought here, anyway, they will be caught at once. As for the documents, Liu Tan wrote them himself, because only he knows where to restrain Kai Guan.

After signing the document, Liu Tan said to Kai Guan: "It's not easy for you to travel all over the world these years. You spent half a month before doing mental calculations. Before your family arrives, you should rest for a few days. I will send someone to recruit, feel more at ease."

Kai Guan was so moved that he almost burst into tears. He thought Liu Tan's requirements were a bit harsh before, but now it seems that he is more strict. The treatment is good!

Not to mention food, clothing and housing, a small courtyard was given to him in Shiheyuan, which was better than his family's house in Shuofang.

No, not better, much better.

That yard is more than enough to live in their family, besides these, he is also given monthly money, which is enough for him to support his family!

Not to mention that His Highness the Fifth Highness was very considerate to let him rest, and for a while, Kai Guan also had some thoughts of dying for his confidant.

However, in fact, the cost of raising Kaiguan, and even Kaiguan's family, is not a big deal in the eyes of Liu Tan today.

There is nothing wrong with his sugar shop as described as earning a lot of money every day. With such a hen that lays golden eggs, Liu Tan doesn't worry about money at all, not to mention that Chen Gillian subsidizes him from time to time, and Liu Che is even more generous with rewards.

As for letting Kai Guan rest, it is actually not a humanistic concern, and there are reasons for this.

Liu Tan hasn't had any information about maps since he traveled here. He doesn't know how maps are drawn these days, and the most important thing is how to calculate the scale.

He didn't intend to forcefully apply the map drawing standards of later generations to the present. After these maps were successfully drawn, those generals were used the most, not Liu Tan.

These generals are used to the previous map, what if they are not used to another standard suddenly?

You can take your time if you are not used to other things. If you are not used to it, you may kill thousands of soldiers.

It's just that in this era, the map is very important, and it can be regarded as one of the important military supplies, and most people don't show it.

After thinking about it, Liu Tan decided to ask Li Xi. Anyway, he doesn't need to see the map, he just needs to know some data.

When Liu talked about the Li family, he found that the current life of the Li family was not bad. Mrs. Li Xi was very enthusiastic when she saw Liu Tan.

It happened to be a holiday, and Li Xi's father and son were at home. Li Buyi said in surprise, "Why is Your Highness free?"

Li Xi slapped his son on the back of the head: "How do you talk? Why don't you hurry up and salute? Less and less lesson!"

Liu Tan quickly smiled and said, "No need, we are all acquaintances, so we don't need to be so polite at home."

Li Xi suddenly felt a little sad when he heard that he was his own family. When Liu Tan first arrived at his house, he was really fearful, for fear of spoiling the prince.

But after really raising him, I found that the prince is no different from ordinary children.

After more than ten years, even if he was not his own son, he was raised as a son, but after an edict, this son is not his own. Li Xi feels sad every time he thinks about it.

Fortunately, Liu Tan still recognized them and was willing to treat them kindly, otherwise...he would have suffered even more.

Li Xi suppressed the sourness in his heart and asked: "Your Highness is here for something important?"

Liu Tan nodded and said, "I'm here to inquire about Tutu."

Li Xi was surprised when he heard this: "What is Your Highness going to do?"

Liu Tan smiled and said, "What can I do? I'm just curious."

He decided that no one else would tell his plans except Liu Che and Liu Ju, what if they were leaked out?

Li Xi is trustworthy, but his family is not only their father and son, Li Xi actually has other sons.

Li Xi hurriedly invited Liu Tan to the study, and Li Buyi hesitated and followed him.

Li Xi didn't ask too many questions, he just said, "What aspect does Your Highness want to ask?"

Liu Tan asked: "What kind of comparison is the map drawn now? What percentage of the reality is marked on the map?"

Liu Tan racked his brains to explain the word "scale" in an easy-to-understand manner. Now that he wants to say "scale", Li Xi must not understand it.

However, he felt that he had already made it very clear, but Li Xi still looked at a loss: "Huh?"

Liu Tan couldn't think of any other way to explain it, so he said, "Tell me about how ordinary marchers judge the distance from maps."

This time Li Xi understood, and he said, "It's mainly through the notes on the map."

"Remarks?" Liu Tan was taken aback for a moment, this seemed to be different from what he thought.

Li Xi said to Li Buyan: "Bring the picture on the shelf over there."

Li Buyan immediately turned around and went to the shelf on the left side of the study to take down a scroll. The outermost part of the scroll was wrapped in cowhide. The one map that is cherished, and the only one.”

Liu Tan didn't expect Li Xi to have a map in his hand, and his interest suddenly increased. He watched Li Xi unfold the map bit by bit, and then... was disappointed.

This map is really too simple. There are a few lines on it. There are straight lines and curved lines. Mountains, rivers and rivers can be recognized in front of you. Some are wrong numbers and the area is small. Needless to say, there are indeed some small characters on it, which are all about what is from which mountain to which distance.

Li Xi stroked the corner of the map with great care and said: "This is what I used when I went to the Xiongnu together with the general. At that time, I set off from Dai County, and the general sent troops from Yunzhong County. We fought all the way to Gaoque. Then they fought in Longxi, and drove out King Baiyang and King Lou Fan together, that battle was really hearty, the general is truly a genius."

This was the first time Liu Tan heard Wei Qing's name from someone else. He realized that Li Xi's address to Wei Qing had not been changed to the posthumous title of Marquis Changping Liehou, but was still called the Great General. Obviously, he had deep feelings for Wei Qing.

And when he talked about that battle back then, his eyes sparkled, and he seemed to have returned to his youth, with high spirits.

He tilted his head to look at Li Xi and was about to wait for Li Xi to say more, but Li Xi seemed to have suddenly returned to reality, and said dejectedly, "It's a pity... the great general and the great Sima Hussar both left too early."

Liu Tan also felt sad after hearing this, if these two were here, where would it be Wusun's turn to ask for marriage?

Li Xi coughed lightly and said: "I am old, and I like to recall these things, which made His Highness laugh."

Liu Tan said: "No, that's all I love to hear. Attacking the Xiongnu in the north and exalting my great man Tianwei are things that many people dream of."

Li Xi suddenly said with emotion: "Yes, the destination of the leading general should be the battlefield, not..."

Speaking of general, he stopped talking and did not continue.

However, Liu Tan can quite understand his thoughts. Although the battle is difficult, the result is very clear and obvious. No matter how much wits and courage are fought in the middle, it is within a certain range. When returning to the court, there will be more things involved.

Li Xi has experienced all kinds of ups and downs in these years, so it is not surprising to have such emotions.

But this topic cannot be discussed, even though he believed that Liu Che would not be so dishonest to plant nails in the minister's house, or even if he did, he would not press the nails in Li Xi's house, but he still changed the subject and said: "This map is really well preserved. .”

Li Xi said: "Yeah, it's not easy, please see, Your Highness..."

Next, Li Xi explained some key points on the map to Liu Tan.

This kind of thing is considered a secret in front of people with insufficient status, but in front of Liu Tan...the whole world belongs to their old Liu family, and there is no such thing as secrecy.

After listening to it for a while, Liu Tan found that map drawing in this era was indeed very primitive, and there was no such thing as a six-body map or a plan!

This is almost equivalent to asking him to start formulating the rules for map drawing again!

The question is is this thing so easy to formulate?If you want to promote it, you have to accept it!

After listening, Liu Tan nodded and said, "I understand."

Li Xi was relieved to see that Liu Tan didn't want to leave the map on a whim, and he asked Li Buyi to put the map back carefully, "Your Highness, are you preparing for the trip to the Western Regions?"

Liu Tan nodded: "We have to be prepared for a long journey."

After hearing this, Li Xi said with relief: "Your Highness, don't worry, Honglu Temple will be ready."

Liu Tan didn't say what his plan was, but stood up and said, "It seems that I was worrying for nothing, by the way, will Li Buyan want to go with me then?"

Li Xi was slightly taken aback: "Is he going?"

"Look at you, if you want him to go, you can take him with you, and if you don't want to, you can stay." Liu Tan thinks that this trip can be regarded as having some qualifications anyway, and it can also be regarded as preparation for future expeditions.

In fact, Liu Tan could see that Li Xi probably didn't want Li Buyan to take the military path, but there was no way, Li Buyan really...had no other specialties.

In fact, Liu Tan didn't know whether Li Buyan had any specialties in leading soldiers, but at least the family inheritance should be better than ordinary people.

Li Xi was a little hesitant, but Li Buyan's eyes lit up: "Can I go? Daddy, I want to go!"

Li Xi thought about it for a while, and felt that there should be no danger because he was just sending off the team and not going to fight, so he nodded immediately and said, "But, you must be careful and take good care of Your Highness when you go here."

Liu Tanxin said that it is not certain who will take care of whom, and besides, with so many people around him, why does Li Buyan need to take care of him?It would be nice for Li Buyan to take good care of himself.

After deciding on this matter, Liu Tan hurried back to Shi Heyuan.

Sitting in his study, he tried hard to recall the way of planning and drawing squares and the meaning of drawing six bodies.

These two things will not appear until the Jin Dynasty, and they were invented by Pei Xiu of the Pei family in Hedong, but there is no way, now Liu Tan can only let it qualify in advance.

Among them, the six-body drawing is more complicated, but the planning method is the simplest. It is just to draw a grid according to a certain proportion on the paper, and then specify the length and width of each grid, and then scale down the real terrain.

But when he was preparing to make a grid, Liu Tan discovered a very serious thing: the current paper is very, very rough!

This kind of paper is usually used for writing without any problems, but it will cause a lot of troubles when used for drawing, especially when high precision is required. Uneven paper can easily cause certain problems in proportion.

Liu Tan sat in front of the desk with a piece of paper and started to be in a daze: Is he going to compete with Cai Lun for a job again?

The author has something to say: Liu Tan: When will this Nine-Nine-Eight-One Difficulty end?