Han Qian hurried back to the Hibiscus Garden before dark, and there were two old men in kudzu clothes sitting in the courtyard in a regular manner, their faces wrinkled like dead tree bark, and they followed Ji Fu back with them.

"These are the two craftsmen of the state capital, Fan Ye said that there is something to order from the young master, and asked me to bring them over and wait." Ji Fu said with a bow.

Ji Fu is a smart person, after arriving in Xuzhou, he followed Fan Xicheng closely, most of them also thought that through Fan Xicheng, he could get a fortune in Xuzhou, but he felt that his son followed the young master Han Qian's side and wanted to cling to the past, which was wishful thinking.

Even if Ji Fu was a master craftsman in the Chaozhou government-run shipyard in his early years, he was also a craftsman with a separate household registration and his ancestors were not allowed to enter the office.

"Fan Xicheng said that I have something to do with you?" Han Qian asked puzzled.

Ji Fu and the two old men were stunned.

Fan Xicheng instructed them that the young master had something to look for, and they didn't dare to ask a few more words, who knew that the young master didn't remember anything at all.

"What will you do?" Han Qian asked the two old men in Ge Yi.

The two of them were silent for a long time, but they didn't say a word, and Ji Fu replied on his behalf: "The two of them are craftsmen who specialize in making copper and iron tools from the State Capital Engineer Institute, maybe Fan Ye made a mistake, so I will take them out." ”

"Oh, I do want to use them, stay and eat together, and talk about things after dinner." Only then did Han Qian think that his father was going to keep an eye on him in Xuzhou and build the goniometer first.

It is not on the turbulent ship, the land goniometer is very simple, and the more difficult thing is to use the calculation method of dividing the arc in the "Zhou Ji Sutra" when identifying the scale; Otherwise, there is no guarantee that the scale will be accurate enough.

It is not a problem to estimate the height of a mountain peak, with an error of more than ten or even tens of meters, but if his father uses this method to reverse the relative elevation of the surrounding terrain in order to excavate the canal in the hilly zone of Xuzhou, the error is slightly larger, and the dug canal will be directly scrapped and will not be able to cross the water.

In addition, Han Qian saw that his father had also seen information on the construction of terraces on the way to Xuzhou, and most likely he would think of encouraging the construction of terraces in Xuzhou.

Traditional terraced fields, mostly dry land; To build paddy fields, it is necessary to build ponds on the slopes of the mountains to store rainwater, and at the same time, it is also necessary to keep the height difference of the terraces on the same floor at a very low value, otherwise the terraces will not be able to store water.

Xuzhou has abundant rain, and the yield of paddy fields is much higher than that of dry fields, but purely through visual inspection, repeated attempts, I don't know how much manpower and material resources will be wasted if you want to cultivate a terraced field straight.

If you can really use a goniometer to determine the elevation point of the circle circle on the hillside, and then reclaim the terraces along the contour point, I don't know how much work you will have to save.

Such a seemingly simple thing is extremely useful in Xuzhou, where the terrain is complex, and it is no wonder that his father can't wait to chase after it and make it happen, for fear that he will forget it.

Of course, it seems like a very simple thing to say to Han Qian, but it is not easy to really calm down and think about how to do it.

For example, the base of the goniometer must be able to be accurately and finely adjusted in the field to ensure that the base surface is just the right level; However, if the level verification of the base surface of the table is still at the level of depicting the cross sink, it will be too rough.

Han Qian thought that bubbles have the characteristic of always floating at the highest level of liquid, and thought that it would be more accurate to use glass or crystal with good permeability to seal a small bubble in the cross trough, and then to check the levelness with the specific direction of the bubble.

The base surface of this goniometer itself should be made straight enough, and it is definitely not possible to rely on traditional casting, and old craftsmen are still needed to grind it in the later stage.

After these are completed, the trigonometric values corresponding to the angles need to be calculated and listed in a table so that the actual user can find the values and calculate the elevation difference.

Han Qian naturally didn't teach the craftsmen of the state capital how to make a goniometer, and at the moment he only explained his idea to the two old craftsmen in detail, and then drew a relatively simple schematic diagram, and asked them to make it first according to the gourd to draw the scoop.

Han Qian thought that it might be more convenient to wait for them to create a real prototype first, and then adjust it little by little, than if he directly designed drawings that were accurate to the millimeter, and let them create things according to the drawings.

…………

…………

After nightfall, when he saw his father coming back from the front office, he also invited Xue Ruogu, Li Tang, and Qin Wen to come to the Furong Garden to drink together, so Han Qian ran over to accompany him.

In front of Xue Ruogu, Li Tang, and Qin Wen, Han Qian did not disguise that he would use various means to promote the people of Jinghu and Xiangtan to pour into Xuzhou, and when the time came, he would ask Xue Ruogu, Li Tang, and Qin Wen to give convenience.

Xue Ruogu and the three of them were shocked, but they were silent when they thought that this might be a means for the three princes to use Xuzhou as their own turf.

Although Xue Ruogu and the other three stood on their father and son's side more firmly on the night of the state prison, Han Qian always suspected that some of them were close to Tanzhou.

If any of Xue Ruogu and the three of them were close to Tanzhou, and they didn't have time to deal with the sinister situation of the state prison that night, then under the circumstances at that time, standing with his father and son was really a normal choice, and it could also weaken the vigilance here.

However, after drinking a meal, Han Qian didn't see anything abnormal from Xue Ruogu and the others.

Watching Xue Ruogu and the three of them leave, Han Daoxun drank the fragrant tea brewed by Qingyun and said to Han Qian: "Not everyone is as untrustworthy as you think. ”

"If the father didn't suspect that there might be something wrong with the three of them, if he hadn't already observed, how would he know what the child was suspicious of?" Han Qian took the teacup from Qingyun's hand and asked with a smile.

Han Daoxun smiled bitterly and asked, "You are so attentive, do you really not hide it?" ”

"Of course, it is necessary to cover up, Lord Xue, it is impossible for them to go to the four surnames to fiddle with right and wrong," Han Qian smiled, "I just have a headache now, how can this news reach Tanzhou's ears as soon as possible!" ”

"Oh?" Han Daoxun looked at him suspiciously.

"The child said at noon that he wanted to lure the displaced people to gather in Xuzhou, but the father did not dissuade him, presumably because he saw that there was a problem that the child could not solve, right?" Han Qian asked with a smile.

"What's the problem?" Han Dohoon didn't answer directly, but continued to ask.

"The father must be thinking about what the child needs to do to move the roadblock of Tanzhou, right?" Han Qian said directly, "I still felt a headache before, but at this time, I suddenly understood how to solve such a problem. Father, you must have thought that the child was going to suggest that the wolf be brought in, right? ”

Fan Xicheng, who was drinking tea with him, was also surprised when he heard the young master Han Qian say the word "luring wolves into the room".

Zhao Kuo is currently staying in the state prison to purge the jailers, Han Laoshan has limited knowledge, and is mainly responsible for managing the internal affairs of Furong Garden, in addition to Han Qian, Fan Xicheng is actually Han Daoxun's main assistant in Xuzhou, and Fan Xicheng is also by his side in everything.

These days, Fan Xicheng also knew how complicated the situation in Xuzhou was, but he didn't expect that the young master would suggest luring the wolf into the house, he looked at Han Daoxun suspiciously, not knowing how the head of the family would decide.

Han Daoxun smiled bitterly at Han Qian: "Alas, do you suspect that any of Xue Guruo's three people have a problem, and you are talking about your plan to lure displaced people into Chenxu and other places, whether you want Tanzhou to know about this, and see it as a good opportunity to infiltrate the southern Hunan states, what is so difficult to guess?" ”

"Haha, it is said that Zhizi Mo Ruo's father, what kind of ass am I really pouting, Daddy, you know what shit I am going to pull!" Han Qian said with a smile.

"What kind of bastard metaphor are you?" Han Daoxun smiled helplessly.

"Even if Tanzhou has the intention to infiltrate forces in the southern Hunan states, it is far less effective than directly sending thousands of people close to Tanzhou, or directly controlled by Tanzhou, to enter the Chenxu and Shaoheng states to take root,"

Han Qian had already thought through the front and back joints at this time, and his mood was unusually comfortable, and he said,

In recent years, the situation in Xiangtan has been relatively stable, and there is no special reason, and the guest people who moved south from Xiangtan have even begun to return to the shores of Dongting Lake, not to mention that a large number of people from Xiangtan have moved south. If we spread the news of luring the displaced people into Syria to the ears of Tanzhou as soon as possible, wouldn't it be a good opportunity for them to secretly expand to the states of Chenxu and Shaoheng? However, there is a prerequisite for this, that is, father, you must first allow the displaced people to organize their own reclamation of barren land in Xuzhou. In this way, Tanzhou can see that the men and horses they have sent will be able to gain a foothold directly through the reclamation, and continue to gather together to form a force under their secret and direct control. And what you want to do, father, can actually be completed by Tanzhou on your behalf! ”

"Alas," Han Daoxun said, "you also know that you are 'luring the wolf into the house', and it will only make the situation in Xuzhou more complicated at that time." ”

"Tanzhou is a wolf, and the four surnames are local snakes, only let them bite each other in Xuzhou, the situation seems complicated, but it can really reduce the pressure on my father's shoulders,"

Han Qian said,

"I went out of the city this afternoon to trace the flow to the Zhijiang River, and saw that there are a lot of shallow silt land that can be reclaimed on both sides of the Yuanshui River, I guess Lord Wang Yu should also deliberately reclaim the shallow silt land on a large scale, so that the four surnames or Tanzhou are jealous, so they were poisoned, right? I'm thinking, father, if you really want to organize the people to reclaim the shallow silt on both sides of the Yuanshui River in the name of the state capital, the four surnames will oppose you, and Tanzhou will never sit back and watch you use this matter to form your own power in Xuzhou - father, you have no such intentions, but you can't deny that building water conservancy and implementing large-scale reclamation will make your influence go deep into the pawns of the peddlers. As a thorn in history, if he is committed to increasing the official land and vocational land belonging to the state government by tens of thousands of acres or tens of thousands of acres during his tenure, you will want to say that you have no ambitions, and Tanzhou will not believe it. Father, you let the people of Tanzhou in, and when the rumors are flying all over the sky, the four surnames will only think that these rumors that lure the displaced people in are secretly spread by Tanzhou, and they have nothing to do with you and me, father and son. ”

"Tanzhou will definitely fall for your plan?" Han Do-hoon asked.

"Tanzhou doesn't regard forces like the four surnames as strong opponents, so for them, there is no such thing as a mid-the-middle. And they really thought that our father and son could pose any actual threat to Tanzhou, and they should take this opportunity to send people to infiltrate them," Han Qian said with a smile, "If no one around my father spreads the news to Tanzhou, I will take a detour to Tanzhou when I return to Jinling, and personally sell this plan to the Ma family." ”

Han Daoxun felt a faint pain in the back of his head, although he looked safer in Xuzhou in the future, but the situation made Han Qian so complicated and chaotic, and he was completely unconfident at this time that he could grasp the situation in Xuzhou and not let it get out of control.