Building bridges and paving roads is not an easy task, but in general, building bridges is more difficult than building roads. Pen @ fun @ pavilion wWw. ｂｉｑUｇE。 info And unlike 1,500 years later, the Guanzhong area of the Tang Dynasty was not comparable to the south of the Yangtze River, but it was definitely a cluster of rivers.

And between these rivers, there are also a large number of ditches, irrigation ponds that resemble shell craters, and irrigation canals that are used in the Han Dynasty to this day. There are traces of things like qanats, all kinds of plains.

I don't think it's like much on weekdays, but there have been a lot of wars in recent years. The rotating military brigade often has to go from the Chang'an area, and the emperor has paraded from the Suzaku Gate several times plus inspections, and the roads and bridges are uneasy.

With the productivity of this era, an ordinary wooden bridge can carry an army to pass smoothly at one time, even if it is of very good quality.

However, it often happens that the time required for the movement of military rations over a distance of two hundred miles may take five or six times longer than that of flat land transportation if there are two or three bridges.

When Zhenguan was three years old, the Tang army encountered this embarrassment in Hebei, but fortunately, the Tang army in the three years of Zhenguan had transformed into a berserker. If you don't eat for a while, you won't make trouble, just rush over and grab it.

In the face of the appetite of the current king-level bosses, Lao Zhang is not going to do a big market or how, but to solve the real needs first.

The emperor's court, the common people, and the merchants who did not enter the stream, all needed to walk more smoothly in the Guanluo area.

And Zhang De was in Zhenguan for five years, and he frantically promoted the Zhaozhou Bridge of Li Chun in the previous dynasty.

With the help of new tools such as pulley blocks, the construction of the stone arch bridge is not difficult, but the real restriction of the completion time is the polishing of the stones. Then there is the cracking of the bridge deck pavement and water seepage after long-term use.

In Henan Province, especially in the Luoyang area, there have been cases of poorly made stone arch bridges collapsing due to the Yellow River.

According to local conditions, at this time, the water resources in the Chang'an area are still relatively abundant, so the problem is not the water seepage of the road surface, but the wet and soft arch soil filler, which produces deformation, so that the horizontal thrust of the stone arch bridge is reduced, and the pressure resistance is reduced.

It is not difficult to solve this problem, two things, one is cement, and the other is coal ash.

The latter is very easy to solve, Liangjing and even Taiyuan, now the middle households and above, have begun to use coal, a little better have used briquettes, Mendi House, naturally are the anthracite coal of Hexi Coal Mine to which Zhang De belongs.

However, the cement gap is huge, and the difficulty of production is crushing, except for the problem of calcination. Of course, the use of wooden ball mills is hydraulic, so this limits many places where there is a large gap in cement demand but cannot be produced locally on a large scale.

Like in the northern part of the country, Wei Chigong built a lot of construction in the grassland, mainly to build the Wu Fort, the Ridge Fort, the Tibetan Soldier Station and the Grain Cave. All of these require a large amount of cement to support the strategic project of grassland control, and even the construction of green material towers is only a supporting project.

Another example is the Tibetan Plateau, where the construction of fortresses is even more urgent, and ordinary passes are easy to break after all. Although it is often said that forts are often breached from within, technically speaking, the former is more reliable.

"It's good that Jiangxi wants to build cement. However, like the Luling land, the fangs often make trouble, and the gray sugar in Lingnan has rarely gone north here, but it is a sea route that goes north retrospectively. ”

The Jiangxi mentioned by Zhang De is naturally a piece west of Jiangnan Province, mainly Yuezhou, Hongzhou, and Raozhou.

These three states are on the same line, with two large lakes in the east and west, and the water network is extremely developed. Fish and rice resources are no longer a selling point for the "Zhongyi Society", and the selling point of this line lies in the abundant manpower, very rich water power, and extremely rich raw materials.

What really makes people greedy is the unique soil of Raozhou.

The porcelain capital that has been popular for hundreds of years is in Raozhou. And what is inexplicable is that there are several special types of clay, which are the only ones here, and there is no other branch in the world.

"This year, there are many kinds of Chinese herbs in Raozhou, and we have the method of cellaring in the old year, and we can get hundreds of thousands of catties of pickled vegetables this year." Li Fengjie often goes out now, and his style is very similar to his father Li Daliang. It's not that good at the top, but among the low-level bureaucrats and people, some people have already praised Li Fengjie as a "little Liangzhou" and admired his ability to sort out.

"Speaking of which, this draught is really powerful." The eldest grandson Chong is a dignified son, and now he has been reduced to discussing the yield of vegetables with a group of friends, which is particularly interesting, he is sipping tea, and it is very comfortable to drink tea in autumn and winter, only to see him holding his hands in the cuffs of the cotton robe, like the old farmer on the ridge of Hedong, but this outfit is more gorgeous.

After swallowing the tea, the eldest grandson Chongcai said again, "Last year's woad in Hedong...... It is mainly white siad, and the yield per mu is only three or four thousand catties. In that place in Raozhou, there are many mountains and little land, but the yield per mu is almost more than 10,000. Jia Junpeng told me that it was related to the amount of water, but he didn't believe it, but now he is convinced. ”

In terms of farming, there is no one in the whole Tang Dynasty who is enough for Jia Fei to fight.

There was a pair of words that didn't match, and Li Fengjie glanced at Zhang De: "Brother, in a few places in Raozhou and Hongzhou, manpower is still okay." In March this year, 20,000 fangs were arrested, and Hongzhou's manpower was still enough. Moreover, several coal mines have also been discovered in Jiangxi, and one is in the Le'an River in Raozhou, which is very bento. ”

"There is a lack of a reason for people to hand over the slip to Chen."

Zhang De shook his head, he also had a headache, the "Zhongyi Society" is getting stronger and stronger, and the uneven distribution of spoils has begun to happen. The children of businessmen naturally have no power, and most of them find a thigh and hug it. It's more about hugging the thighs in a group, and the bets may not all follow Zhang De.

After all, no matter how Zhang Dalang looks at it, he is just Zou Guogong's nephew, or a clan nephew, and he doesn't know how many relatives he has left. But Zhang Dalang seems to be very favored by the emperor, and he has three ups and downs at the age of eighteen, which is a serious official and has done things. In addition, it seems that the emperor's daughters are a little estrus......

"No matter how manpower is, it's not enough, tens of thousands of hundreds of thousands of people fill it in, and my brother can tell you very responsibly, and I can't even see a splash."

Zhang De said calmly, the words were for Li Fengjie to listen to, but others could also listen to it. In many cases, those who are not involved in these things cannot understand how deep the water is.

The twenty or thirty thousand prisoners of war were all reduced to slavery, and those who could really work were cut in half. The result of various reasons may be unadaptation, violent resistance after losing freedom, or mental illness. Even if the Turkic slaves were only used in the coal mines and workshops of the Hetao, the mortality rate in the early years was close to 20%.

Then there was the explosion of the mortality rate of most slave laborers, because after a year and a half of hard labor, they basically fell ill in patches.

And if a slave worker falls ill, it is equivalent to death.

These labor resources are too cheap, as long as the Tang army continues to win, as long as the domestic scholars are still in moral attack, and as long as the emperor and the court are still playing, these labor resources can be obtained at any time.

The handicraft industry may be fine, but the manual labor in the mines and workshops, instead of waiting for the young people in the country to work after the age of fifteen, it is better to get the slips directly from the Ministry of Civil Affairs and the Ministry of War and buy a batch.

The most important point is that even if you sign a red and white contract with someone in China, you can't just beat someone to death. Even Zhang Liang's fake sons go out to be presumptuous, and they have to see what the other party is about first. And the prisoners of war ...... There is no difference between beating to death and dying of exhaustion.

"This year, we must calm the valley, if we go out at the end of the year, the military rations are very important." Li Fengjie thought for a while, "If Raozhou pickles and pickles can be offered, it will be a great achievement." ”

The eldest grandson's eyes lit up, and he clapped his hands and said: "It is reasonable, and there is no need for the military department to come to show merit, and it will be submitted by the Raozhou locality, which will show more loyalty." At that time, he bribed the prisoners, and only said that he would open the mountain, build roads, build bridges and build embankments, and he would be rewarded. ”

Hearing what they meant, Zhang De also nodded: "If Jiangxi can buy a cement factory, it would be good." At that time, a few more kilns will be set up to solve the urgent need. ”

The urgent need, of course, is that the hungry upstarts are following the example of Fang Mou Du to expand. Most of these upstarts have one or two sons in the "Zhongyi Society", and they can not only mobilize the funds of some of the wealthy merchants in the west of Chang'an City, but also mobilize some of the family's political resources at the central and local levels.

The whole process, in terms of Lao Zhang's worldview values more than a thousand years later, is simply eating people and getting fat. But for the upstarts, instead of biting their heads with the old families and dying a few barbarians, what can this call a problem? (To be continued.) )