"In addition, we need to have enough charcoal to buy, enough charcoal, as much as we want." This is over, and Huo Gang proposed the next one.

"That's fine." This time, Yang Lao Wu replied very simply, charcoal is the most used in this era, and almost all heating in winter depends on charcoal. In fact, although there were deserts in the Western Regions during this period, there were not many forests.

But it is precisely because of the thousands of years of history that human beings use a large amount of charcoal, resulting in more and more forests being cut down, and the Western Regions is originally difficult to maintain water and soil, as the forests are less and less, so many rivers and lakes in the Western Regions are gradually interfering, when there is no water source, Gobi, desertification will naturally become more and more serious.

But now Huo Gang has no way to solve this, he can only find a way to develop first, as for the back, in addition to his own crazy planting of trees, it is best to solve Yiwu Country first, if Huo Gang is not mistaken, there is an open-pit coal mine near Yiwu Country, that is, near Hami in later generations.

As long as coal can be mined, these problems will be solved.

After all, although charcoal can also produce high temperatures, it is still not as good as coal.

"Well, apart from that, do you know where there is a poplar forest?" Huo Gang asked another question.

Huo Gang has seen a lot of small pieces of poplars, for example, you can see many small pieces of poplars in the south of Yangguan and all the way to the Qilian Mountains, but Huo Gang doesn't know where to have a large area of poplar forests.

"Populus?" Yang Lao Wu was stunned for a moment.

"Oh, it's called the Tung Tree." Huo Gang also said another name for Populus euphratica.

"There is a large poplar forest near Loulan Kingdom, where the poplar forest was originally very vast, but because of the continuous cutting by the Loulan people, it is now getting smaller and smaller, but the number is still quite large." Yang Lao Wu immediately spoke, "The general wants this?" ”

"The wood of poplar is good for building bridges." Huo Gang roughly explained that Populus euphratica was the Populus euphratica that was propagated by later generations, born and immortalized for a thousand years, and immortalized for a thousand years.

Populus euphratica, light-loving, heat-resistant, atmospheric drought-resistant, salinity-alkaline, wind-blown sand, it requires sandy soil, where the desert river flows, it follows, because it is difficult to decay after death, so later generations often study the direction of desert rivers in ancient times according to Populus euphratica.

Because of the particularity of its growth, its wood can be soaked in water, with extremely strong corrosion resistance, this water resistance and anti-corrosion effect is a good material for making bridges, including making wooden boats and so on are also very good.

Moreover, Populus euphratica can also be said to be a kind of tree with treasure all over its body, because it can grow on highly salinized land, its cells are very permeable, and it can absorb a lot of salt from the taproot, lateral roots, trunk, bark and leaves, and can excrete salt through the secretory glands of stems and leaves.

When the salt accumulation in the body is excessive, Populus euphratica can automatically excrete the excess salt from the knots and cracks of the trunk to form white or light yellow lumpy crystals, which can be used as medicine, called "Populus euphratica tears" or "sycamore tears" (named because the leaves resemble sycamore leaves), commonly known as "eucalyptine".

Populine is a natural alkaloid, it can be used to make steamed buns, and in this era, it can be said that it can also be used as a part of the chemical base, so Huo Gang wants to get a poplar forest out.

And it can also be used to make soap, and an adult poplar can remove tens of kilograms of salinity a year, so it can also improve the soil, especially saline land.

There are a lot of saline-alkali land in the Western Regions, and the foliage sheep of this thing like to eat it very much, and it can also be used as medicine.

But for now, Huo Gang is going to use it as a bridge.

Because with the assistance of the Spirit of Yumen, the precipitation in his territory will inevitably increase, so it should not be difficult to connect the water sources between Yumen Pass and Yangguan, and some bridges will definitely be needed here at that time.

The main road can be made of concrete piles, but some of the bridges can be made of poplar.

Cement Huo Gang can be produced, but the amount of steel is really not much, and if there is no steel for concrete, it is not strong at all, especially as a foundation pile.

"This, if we go to cut down, the Loulan people shouldn't say anything, but we are too far away from Loulan, and there is also the Turkic Tongluo Department in the middle, which is also the Turkic management of this vicinity." Yang Lao Wu said.

"Oh?" Huo Gang raised his eyebrows, "Speaking of which, if there are people nearby who ask the Turks for help, then it is this Tongluo Department that will send troops last." ”

"Yes, General." Yang Lao Wu immediately spoke.

"Well, then, I see." Huo Gang nodded, "You will set off early tomorrow morning, by the way, you take a few people who know how to do arithmetic with you, since you lived in Ake City before, after you pass, set up a permanent point over there." ”

"Yes." Yang Lao Wu directly agreed.

Early the next morning, Yang Lao Wu had already taken people to set off directly, as for the money issue, don't worry, Huo Gang is really not short of money now, mainly because all the things that the Black Mountain thieves have robbed for more than 20 years are cheap Huo Gang, which is a huge wealth.

At least for now, it shouldn't be a big problem to meet Huo Gang's early needs, not to mention that Huo Gang still has enough ways to make money, but if he is not short of money, Huo Gang will not use such a way for the time being.

After Yang Lao Wu left, Huo Gang gathered all the carpenters, stonemasons, and potters here.

Of course, Anno is also there, and these craftsmen who follow Anno are not young, but fortunately, there are no big problems with independent movement and horseback riding.

"What's your name?" At the forefront of these people stood a responsible person, and such people were often the most skilled people in ancient times.

"Back to the general, my name is Lu Ji." The middle-aged man standing in front of the carpenter was quite strong, but the middle-aged man with a somewhat gray beard spoke.

Huo Gang nodded and said directly: "Lu family......"

Who knew that as soon as Huo Gang said this, before he could say the following words, Lu Ji's body shook directly, his legs were weak, and the whole person almost fell.

He originally wanted to kneel down directly for Huo Gang, but before he could kneel, Luda remembered that Huo Gang said that kneeling was not allowed here, and he held it up again.

This one back and forth, the whole person almost didn't stand firm, but fortunately, the two carpenters standing behind him reacted quickly and directly reached out to support him.

After regaining his footing, Lu Ji clenched his fists in a panic and saluted: "General...... Checkmate...... I...... I don't deserve the word everybody. ”

In this era, not everyone should be the word everyone, at least it is impossible for them to use these two words at all.