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

After eating hot pot and barbecue, Liu Che felt comfortable all over. Liu Tan asked him to take a break from the dressing room next door to adjust to the temperature before going out.

It is also easy to get sick if you suddenly go from a relatively cold place to a hot place.

After getting used to it for a period of time, Liu Tan accompanied Liu Che all the way to the main hall, but as soon as he stepped in, he saw Zhu Shanqian walking in a hurry.

When Zhu Shanqian saw Liu Che, he was obviously stunned for a moment, then he trembled, bowed his head and saluted and said: "I see Your Majesty."

Liu Che waved his hand: "Wai Li, you came here in such a hurry because you have something important to do?"

Zhu Shanyi glanced at Liu Tan, and Liu Tan nodded to him, Zhu Shanqiang simply said: "I have just received a letter from the messenger of Shanhe, saying that the second dam has been completed, please choose a date to open the gate, Your Highness." Let the water go."

Liu Tan suddenly looked pleasantly surprised: "It was built so soon?"

A look of joy also appeared on Zhu Shan's face: "The Envoy of Shanhe said that this is already slow. After all, the dam this time is a little bigger than the last one, and we encountered difficulties that we have never encountered before, so this time we used It took a long time, about four months."

Liu Tanxin said that four months is already a long time, and it will take a year or so to build a building for later generations.

However, there is generally no way to say this kind of thing. Whether it is building a building or building a dam in future generations, it is a relatively advanced project, and there are many issues that need to be considered.

And now they are using advanced materials to make primary products, and it is not surprising that they are fast.

Liu Tan turned his head to look at Liu Che and asked with a smile, "Do you want to see the opening of the dam?"

In fact, Liu Che has always paid more attention to water conservancy construction, and many places in Dahan have built dams, but Liu Che has never seen what it is like to release water from the dam. Since Liu Tan opened his mouth, he naturally readily agreed.

After hearing this, Liu Tan asked, "Then Father, do you want to choose an auspicious day to open the gates and release the water?"

When Liu talked about the first dam before, he asked people to prepare it directly, and didn't choose any date at all.

In his opinion, one day earlier is more useful than any auspicious day, but he also knows that there are too many things these days, especially in Liu Che's position, a sense of ritual is a must.

His question was right. Liu Che asked someone to bring over the Taichu calendar. The Taichu calendar was basically similar to the later generations' lunar calendars, with taboos written every day.

Liu Che made thousands of choices and finally chose July [-]th.

When Liu Tan saw the seventeenth day of July, he subconsciously thought that even on the fifteenth day of July, his father would not go back to worship his ancestors?

But soon he remembered that the Hungry Ghost Festival is a Taoist festival, and Taoism doesn't know where it is these days, where did the Hungry Ghost Festival come from?

He calculated that there would be plenty of time for July [-]th, and he still had time for someone to pack it.

The so-called packing is not really packing, it's more about bringing all kinds of food for Liu Che, and having a picnic on the road or something like that.

This time, the dam was built in Yang County, Xi'an. When Liu Che learned about it, his first reaction was: "Which county is Sang Qian the governor of?"

Look, this is the benefit of being registered in front of the emperor. If it was the former Sheriff of Yang County in Xi'an, Liu Che probably wouldn't know who that person was and how he got there, and Sang Qian had Sang Hongyang as his father, even if he himself Even if he had no skills, Liu Che would remember him.

Liu Tan said with a smile: "Exactly, it was basically a stopgap measure to let Sang Qian go. I didn't expect him to do a good job, so he just stayed."

Liu Che nodded and said, "If you're really talented, it's not good to spend too long in a low-level county."

Liu Tan thought that maybe Sang Hongyang was pleading for his son, but of course even Da Siong would not be too blunt when pleading.

Liu Tan nodded and said: "That's just right, I also want Zhu Shanzhang and the others to go out and practice for a while. You have to be an official close to the people in order to truly govern the country well, but it may be a little bit too soon to be a county guard. It’s better to let one go to Sang Qian’s subordinates to be the magistrate, if he does well, he will just take over his position, and Sang Qian will be transferred back when the time comes.”

As for what to do after Sang Qian came back, Liu Tan thought it would be good to let him follow his father's old path. The current Si Nong of the Northern Borderlands really didn't satisfy Liu Tan, so he might as well get him back to Chang'an.

In terms of talent selection, Liu Tan made such an arrangement that even Liu Che couldn't say anything, and even he himself was wondering whether future talents would follow this order.

Although he is not in a hurry to conduct imperial examinations now, even the recommended talents really need to be thrown to the grassroots to practice, otherwise one by one will not know the sufferings of the people, and the country will be governed well in the future?

When Liu Tan told Liu Che about this, Zhu Shanqian had been standing by the side, his face was very calm, he knew before that he must go to the grassroots, if it was Xi'an Yang County, it would be good.

Xi'an Yang County is not considered the largest county in the Northern Kingdom, and the annual tax revenue is not too much, but that place has an advantage that it is close to Shuofang City. Once His Royal Highness the King of the North comes up with something new, then Xi'an Yang County will definitely be able to Take advantage of it.

Of course, the short distance also has its disadvantages, that is, people are easily attracted by the capital, especially those who are capable. Whether Xi'an Yang County can keep people or not depends on the ability of the local governor.

Now it seems that Sang Qian is not bad, but he has more than enough to keep his achievements and not enough to develop. If it is Zhu Shanzhang, he may be more radical.

However, Zhu Shanqing knew very well that if he had been the county magistrate, he would have to be careful even if he wanted to make drastic reforms.

In fact, there is another advantage of being under Sang Qian, that is, Sang Qian will never fall in love with the position of the county guard, and he should be aiming at the position of the center of the northern border country or even the center of Chang'an.

Because it is a summer trip, the first thing Liu Tan thinks about is how to avoid the heat.

To be honest, the temperature in the northern border country is not very high, but it is hotter during the day, and the temperature difference between day and night is a bit large, so he not only thinks about how to escape the heat, but also how to keep warm.

Liu Tan once rode in Liu Che's car, and at that time felt that although the ice basin was cool, it was only limited to places close to the ice basin.

You must know that the carriage is also ventilated. It is impossible to close the doors and windows and turn on the lights, right?

The last time I went to places like the water park were relatively close, so I endured it, but this time I went to Xi'an Yang County.

So Liu Tan began to think about how to modify Liu Che's car.

These days there is no air conditioner but there are fans, and the only thing that can be used is all kinds of ice, so what Liu Tan thinks is that it is best to have ice around the carriage, so that it will be cooler.

As for how to put ice... Of course, it is to use the interlayer, add another layer inside Liu Che's car, and then put ice in the middle interlayer.

This ice will continue to cool the interior of the carriage, and because of the doors and windows, it will not be very cold inside.

As for how long the ice can last, I don't know, but Liu Tan is not afraid, they don't need to take the ice with them, they just need to walk along the Yellow River and bring enough saltpeter.

What's even better is that things like saltpeter can be used repeatedly, so you don't have to worry about not having enough.

The only thing that needs to be done is to divert the water from the ice.

If there was electricity, Liu Tan would still think about building a circulation cooling facility, but now...forget it.

Anyway, as long as the ice can persist until the sun sets, they will start to set up camp after the sun sets.

It's also fortunate that Liu Che has more than one car instrument, otherwise it would be really difficult for him to modify it casually.

While he brought the existing spare frame over for processing, he ordered someone to build another one.

Because the modification is an interlayer added later, you can't see anything from the outside of the car, but you can feel a little less from the inside of the car.

Fortunately, Liu Che wasn't that picky. The first thing he felt after getting in the car was the coolness. He couldn't help asking in surprise, "What did you do?"

Liu Tan pursed his lips and said with a smile: "It's nothing, it's just that someone added a layer to Father's frame."

After Liu Che reached out and knocked, he found that the sound was dull, not completely empty, so he asked, "What did you add?"

Liu Tan held his chin and said, "Father, let's guess."

Liu Che thought for a while: "Ice?"

Liu Tan smiled: "The answer is correct, there is a reward!"

As he spoke, he flipped his hand as if by magic, and there was a small cloth bag in his hand.

In the cloth bag was the grape-flavored candy he ordered to make earlier, um, it was glucose, but it was not medical glucose.

Liu Che picked one up and put it in his mouth and said, "This time it's really a waste of time and money."

Even Liu Che didn't dare to use it like this. The most he could do was put an ice basin in the carriage. If the carriage had interlayers for ice except for the door, how much ice would it take?

If you want to have a replacement, you have to bring ice or have someone send it over quickly. Liu Che doesn't think there is an ice cellar in this wilderness.

Liu Tan said with a smile: "Father, don't worry, how can I do things that are too laborious and costly? We didn't bring ice when we came out this time, and we don't need anyone to deliver it."

Liu Che sneered: "Could it be possible that you can still make ice?"

Liu Tan nodded very seriously and said, "Yes, I can."

Liu Che looked at Liu Tan with some doubts for a while. If another person said this, he would definitely blow him down, and he would curse him for pretending to be a ghost, but if it was Liu Tan...he couldn't help but subconsciously believe that authenticity.

How can people turn into ice out of thin air?Isn't that the method of the fairy family?

Seeing Liu Che's suspicious expression, Liu Tan couldn't help asking: "Is the father not convinced? If not, I will perform a live performance for you."

Anyway, if you are idle on the journey, you are idle, so why not play with Liu Che.

While talking, he ordered two small copper basins to be brought, and secretly ordered that one of the copper basins be filled with saltpeter solution, and the other small copper basin was filled with water.

Liu Che watched him put the small copper basin into the big copper basin with cold eyes. At the same time, he put his hands on both sides of the big copper basin, looked up at Liu Che seriously and said, "Father, you should be careful this time."

Liu Che leaned over to take a look, only to find that the water in the small copper basin had really started to cool gradually, and less obvious ice balls gradually appeared.

All of Liu Che's attention was attracted to it for a moment, and he stared at the small copper basin without blinking, for fear that he might be wrong.