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

When Liu Tan said this, Huo Guang suddenly remembered that Liu Tan rescued Li Xi because he made the grapes from the Western Regions survive and bear fruit in Chang'an.

However, although time passed not long ago, everything that Liu Tan did later was more eye-catching than this, so gradually everyone forgot that he could grow grapes to make wine.

Kou Zhengda on the side hesitated for a while before saying: "Wine... I have tried it, but the quality is not as good as the Western Regions, and the transportation is extremely inconvenient and easy to deteriorate."

After all, wine has a shelf life, and the requirements for storage conditions are more stringent. Even liquor must be kept sealed, and the transportation conditions of this era are difficult to ensure that it is always sealed on the road.

The most important thing is that Dunhuang's taxation cannot support long-distance transportation. For short-distance transportation... almost no money will be made and losses will be incurred. Moreover, people don't like the slightly sour taste of wine so much.

The quality of the wine was not high enough to pay tribute, and it could not be sold. Over time, Kou Zhengda stopped brewing.

Liu Tan calculated the ripening time of the grapes. This year's large-scale fruiting period should have passed. According to the storage conditions of this year, the grapes should not be stored until now.

But he still asked: "Are there still grapes?"

Kou Zhengda nodded and said, "This year's climate is cooler, and there are some late grapes, but... these grapes are generally not very good, so most of the families keep most of them for themselves."

Liu Tan said, "You can bring me some, I'm going to make something."

Kou Zhengda didn't know what Liu Tan was going to do, but he didn't object either.

On the contrary, Huo Guang couldn't help but glance at Liu Tan, couldn't help imagining the scene of Liu Tan running to play with grapes until he was covered in grape juice, and resisted the urge to warn, after all, Kou Zhengda is still here, and he must give His Highness save some face.

He was thinking about this when he heard Liu Tan say to him: "Huo Xiang, Dunhuang will be exempted from tax for one year this year."

Huo Guang glanced at him, hesitated a bit and agreed.

Although the current treasury of the Northern Border Kingdom is not full, this is the first political order issued by Liu Tan after all, and it is difficult to reject it.

I can only comfort myself with the fact that Dunhuang County can't pay much tax.

Kou Zhengda, on the other hand, did not expect to be directly exempted from taxation, so he got up excitedly and saluted: "I thank Your Highness on behalf of the people of Dunhuang!"

Liu Tan said gently: "You go back and rest first, you passed the exam, but you have to stay for a few days, and I will talk about something after they all pass."

Of course Kou Zhengda was meaningless, he wasn't that busy, so staying for two more days was nothing.

After he left, Huo Guang couldn't help asking: "Your Highness, what are you going to do?"

Liu Tan smiled and said, "Has Huo Xiang ever eaten dried fruit?"

Huo Guang was at a loss: "What is that?"

Liu Tan said: "Well, it's not easy to explain, you will know when I fix it."

Seriously, how did you forget about raisins before?

Although Dunhuang's geographical location is not far enough to the west, the climate is infinitely close to that of the Western Regions, and the quality of the grapes there should be very good, which is perfect for making raisins.

As for Xing and Tao, he didn't have a particularly good solution for the time being.

Although these two kinds of fruits can also be made into dried fruits, their natural sugar content is not as good as that of grapes. If you want to make dried fruits that can be eaten, you need a lot of sugar.

Liu Tan did have a recipe for making sugar, but the northern border country was not suitable for growing sugar cane.

The growth environment of sugarcane should be tropical or subtropical. To put it more generally, it can only grow well in the south. It is estimated that the north is not a question of whether it can grow well, but whether it can grow.

There is no sugar cane, relying entirely on stone honey obtained from outside, the cost has increased too much, how much should the dried fruit be sold at that time?

When the market was not opened at the beginning, there must not be many people who are willing to buy if the price is too high, so it is necessary to use raisins that do not need sugar to explore the way first.

Thinking of this, Liu turned to Miao Rui and said, "Go and buy some grapes first, I'll have a look."

First use the grapes from Shuofang to determine the production steps, and then refine the process after the grapes from Dunhuang arrive.

After all, there is still a distance from Shuofang to Dunhuang, and the varieties of grapes may be different.

Liu Tan remembers that he had seen the method of making raisins back then, and there are two methods for this method.

One is the method from Turpan, and the other is the common method.

In Turpan, it is enough to use the local dry and hot weather to put it in a ventilated room to dry in the shade.

However, both Shuofang and Dunhuang are far away from Turpan, and the climate is naturally different. This method cannot be used, and we can only use the most common one - exposure to the sun.

Fortunately, Shuofang is still in autumn, when there is more sunshine.

For the first time to do Liu Tan, let people choose grapes with thin skin and full juice but not soft. As for bad fruit and the like... it is impossible to appear in front of Liu Tan, so there is no need to tell him.

After finding the most suitable grapes, he placed them on the drying trays that he had prepared earlier. These drying trays were made of reed grass, and the bottom was also ventilated enough, and then began to expose them to the sun.

Liu Tan is not sure how many days of exposure to the sun are required, but he has someone record it every day, and he will check it when he has time.

Anyway, there are still a few days before the re-examination, so he can just toss these grapes when he has nothing to do.

As a result, when he went to look again after two days in the sun, he found that the grapes had not lost much water except for a little wilting.

He subconsciously felt that it would not work. How long would it take to dry it in the sun?

Of course, time is not a problem. The problem is that the suitable climate is only a few days a year, and it is not the real Western Region. If there is not enough light, what should I do if there is no time to show the finished product?

And it's too much to see whether God rewards or not.

If you want to be fast, you must deal with it through some methods, and then you must start from the step of accelerating the evaporation of fruit juice.

When Liu Tan looked through it, he accidentally found that one grape was damaged for some reason, and the pulp of the damaged grape was obviously shrunk compared with other intact grapes, which shows that the juice evaporated more.

Although this grape is not a qualified raisin even if it is really dried, it provides Liu Tan with a direction-start from the skin.

The peel protects the pulp and naturally prevents water from evaporating.

It is impossible to remove all the peels, so we can only try to make the presence of the peels weaker.

However, Liu Tan didn't know what method to use until that day when he saw Miao Rui and Bi Gao carefully remove the skin on the surface of the walnut for him.

Liu Tan still likes walnuts, but the problem is that after the walnuts are shelled, the skin on the flesh is astringent, which makes him not like it.

However, because the walnut pulp itself is uneven, it is very difficult to peel it.

Liu Tan had no one to skin him before he crossed over, so he actually used other methods to skin him at that time.

Liu Tan thought about it and suddenly patted the food table and said, "Come here, find me some caustic soda!"

Miao Rui and Bi Gao were taken aback by him, and only one idea popped into their minds: What is His Highness going to do again?