Su Aya kept her identity as a concubine, and was unwilling to appear in public at the same time as Chen Li, so she returned to Tianji Cliff first. Pen "Fun" Pavilion www.biquge.info

Chen Hai took the cheeky Qi Hanjiang and walked towards the Bamboo Hall, the place where the Xue Palace was in the middle peak of Juquan Ridge.

The craftsmen and apprentices who came and went in a hurry saw Chen Hai bowing their heads one after another, and Chen Hai also nodded in response.

Zhang Xiong, Zhao Ruhui, Guo Hongjuan, Xue Cun and others only knew at this time that there was such a big movement outside, not exactly Qi Hanjiang was playing treasure, but Chen Hai was busy and rushed back to the Tianji Academy Palace, and welcomed him into the meeting hall of the Bamboo Hall together.

It was also a coincidence, Zhang Xiong, Zhao Ruhui, Guo Hongju and others were also gathering in the bamboo hall to discuss things at this time.

Unlike other sects or sects, where everyone sits down after a long case, the Bamboo Hall adopts a round table system, and the Tianji-level craftsmen who are qualified to enter the hall and discuss the affairs of the highest level of the school palace all gather around an oval-shaped long table to discuss things.

Looking at the furnishings in the side hall, Chen Hai thought maliciously, if these old men in Taoist robes were allowed to change into suits or white coats, wouldn't they be no different from the earth?

Thinking of the earth, Chen Hai was gloomy for a while, and he was afraid that he would not have the opportunity to return to his hometown in this life.

He casually found a seat and sat down, and asked Zhao Ruhui and them, "Master Zhao, what are you discussing today?"

In addition to Zhang Xiong, as the culprit of the Xiqiang rebellion, and 20,000 or 30,000 people were exiled to Liquan by Chen Hai, Zhao Ruhui and others joined the Tianji Academy, and they had no obligation to the Longxiang camp and Chen Hai, but resisting the invasion of the barbarians was the great righteousness in itself, and it was the duty of everyone to do so.

Listening to Zhang Xiong and Zhao Ruhui talk about what they had discussed before, Chen Hai bowed slightly, and many tasks were still advancing in an orderly manner in the direction he expected, and said:

"The demon barbarian army began to shrink northward, and the defensive battle this winter is nearing the end, but the Yucheng Ridge line is far from being stable, and the pressure on follow-up construction is even greater. The import of young and strong laborers, a few days ago has been negotiated with Tianshui County, Zhou, Wu, Qu and other ethnic groups will no longer stop the landless poor households, move north to Yandang Yuan to find a livelihood, it is expected that this year there will be nearly 200,000 people, moved into the middle reaches of the Guan River to settle down, but a large number of sophisticated tools and common materials, Hengshan needs two or three years to build many workshops, the early stage still needs to be transported from Liquan. It's just that the current capacity of the three wind flame airships is too limited, and the continuous use of them, and the pressure of maintenance is also extremely great -- a more important problem, Yandang is originally a plain with a flat river, and the lakes and rivers in the territory are vertical and horizontal, even if there are minerals underground, they cannot be mined, and a large amount of copper and iron ore needed to build a city can only be mined from the deep mountains at the western foot of Qintong Mountain, but it is a big trouble to transport it...... Do you have any better ideas?"

The quenching iron in Qintong Mountain is extremely rare, there are many ordinary iron and copper ores, and Tianji Xue Palace has long found more than a dozen large copper and iron ore veins in the western foothills, but the biggest difficulty at present is to transport a huge amount of copper and iron ore from the deep mountains at the western foot of Qintong Mountain every year.

The capacity limit of the three wind flame airships is 600,000 catties, plus the main components such as airbags, dragon wrecks, davits and wind flame steam boxes need to be regularly maintained, repaired and replaced, and the annual limit capacity is 100 million catties.

At the same time, it is quite inconvenient to load and unload copper and iron ore into the wind and flame airship.

Previously, in order to meet the needs of the war, Chen Hai gathered tens of thousands of young and strong laborers in the Xilu mine to provide mining, loading and unloading services for copper and iron ore, and barely maintained this matter, but this was extremely uneconomical.

The Tongkou City built before, only considered 350,000 soldiers and horses to settle in, and the city wall was only built to a height of three meters; and the real Tongkou City in the future should be considered to resist the invasion of blood demons, and it can accommodate tens of thousands, or even hundreds of thousands of people nearby, can hide in to avoid disasters, on the one hand, the area of the city is expanded in a considerable foundation, and the height of the city wall also needs to reach 20 meters or even higher.

At this time, I still want to melt iron to build a city, and in the future, I will build ten major cities on the first line of Yucheng Ridge, and the copper and iron ore consumed is far from the concept of one or two hundred million catties.

Some people suggested that in addition to the three wind flame airships already under construction, more wind flame airships should be built, some people suggested that a plank road should be built on the cliff wall of Qintong Mountain, and some people suggested that the waterway of the Tong River in the deep mountains and mountains at the western foot of Qintong Mountain should be used for transportation.

Each proposal has limitations.

Not to mention, an airship is used so frequently, the airbag is replaced once a year, and two or three thousand high-quality animal skins are needed; even if there are ten wind and flame airships, it is actually far from meeting the needs of transportation capacity.

Repair the plank road, is to drill holes in the steep wall of the cliff and insert beams and columns, and then pave the bamboo and wood in sections, but the width of the plank road is limited, and it is easy for a carriage to pass in one direction, and if you want to build a thousand miles of plank road from Liquan to Hengshan, it is not a thing that can be completed in a year, and the final capacity is far from meeting the requirements.

It is true that the Tong River connects Liquan with Hengshan and Tongkou, but the Tong River passes through the deep mountains and mountains at the western foot of Qintong Mountain, and there is a drop of 3,000 meters in height.

Otherwise, the current water and land passage from Hengshan to Tongbei Mansion would have been formed long ago, and there is no need to wait until now.

However, when it comes to the transportation of bulk materials, the use of rivers is undoubtedly the most convenient and economical.

"Ahem!" Chen Hai coughed lightly twice, interrupting everyone's discussion, and with a wave of his hand, the topographic map of more than 1,000 miles from the Tianji Academy Palace to the Yandang Plain was slowly presented in a light curtain.

"The cost of transporting with wind flame airships is too high, even if there are ten or even twenty airships, they can't transport billions of catties of iron ore out of Qintong Mountain every year, not to mention that there are too many places that need wind flame airships. The construction of the plank road is not impossible, but it requires a great investment of manpower and material resources in the early stage, and the future transportation capacity is also limited - this thing is to be done, but it can only be slowly figured out, and it can be built within five years to build a convenient road connecting Hengshan, even if it is successful. The energy in the early stage should still be put on the Tong River. The Tong River meanders out from the eastern foot of Qintong Mountain, goes west through Liquan, and after leaving Qintong Mountain, it goes north to Hanhai. In Qintong Mountain, there are also countless streams, rivers and lakes, which can make the mining sites communicate with the Tong River, and we can even reclaim more fields in the deep mountains at the western foothills......"

In addition to Zhou Jun, Wu Meng, Cao Shan and other clansmen, Chen Hai also accepted displaced people, prisoners of war in Juquanling in his early years, and more than 20,000 criminal clans of the Zhang family moved in in the later period, and the population of Liquan had already reached 300,000.

There are many fields in Liquan Mountain, and it is also thanks to the fact that in addition to the Tianji Xue Palace, the valves can accommodate so many people in the Liquan Factory.

Of course, in order to alleviate the pressure on land, grain and grass, Chen Hai also searched for relatively open valleys and flat dams in the mountains west of Juquanling, almost on both sides of the Tong River, and built villages to reclaim some landless poor people.

At the same time, there are also some indigenous villages in the deep mountains, and there are hundreds of thousands of mountain people in the forests, inhabiting and multiplying, living an isolated life.

Now only the channel of the Tong River is connected, forming an extremely rare waterway channel between Hengshan and Liquan, and the minerals in the deep mountains at the western foot of Qintong Mountain are naturally not difficult to transport out, but in terms of calculation, the amount of work is much more difficult than building a simple plank road.

In five years, it will not be possible to do this at all.

"It is impossible to completely penetrate the river, but it is not too difficult to transport copper and iron ore downstream in just one direction," Chen Hai said, "The Tong River runs 1,400 miles to the west, and there are mainly four major overlapping streams, such as Juquan Lake to the west, which is directly more than 100 high cliffs, but we set up a transfer station at the top of the cliff to transport hundreds of millions of iron and copper from the top of the cliff, which is much easier than transporting it from the bottom of the cliff, and even only need to stick to the stone cliff and build a slideway to dump iron ore down......

If you think about it, it is definitely much easier to concentrate millions or tens of millions of catties of copper and iron ore in front of the cliff and dump it directly under the 100-meter cliff than to transport it to the 100-meter cliff......

Transportation is one thing, and at the same time, how much manpower and material resources need to be invested to mine such a huge amount of copper and iron ore in the hinterland of Qintong Mountain every year?

Thinking of this, everyone frowned.

Hengshan and Tongkou are short of manpower, can they draw out 200,000 young and strong laborers to mine in the mountains?

Chen Hai has long considered this, the puppet technique must be learned and put into practice, if at this time, it will be necessary to use manpower to dig stones with a hammer and a pick, and he will have the reputation of the Heavenly Machine Academy, he took out a stack of picture scrolls from the storage ring and handed it to Zhang Xiong, Zhao Ruhui and others to see.

There are more than a dozen kinds of drawings and conceptual drawings of the curly blade mining car, the rail transportation scroll, etc., which can be seen by Zhang Xiong and Zhao Ruhui dazzling and tongue-a-cheek, especially the curly blade mining car, which is actually installed at the front end of the locomotive, and is also driven by the wind flame power box.

Of course, Zhang Xiong, Zhao Ruhui, Guo Hongjuan and others saw the picture scroll of the mining vehicle, and at the same time thought that if the mining parts were replaced with spiral-shaped blades, would all the traditional dense formations, including the spear heavy armor formation created by Chen Hai himself, be wiped out?

At this time, when I think about it, I was outside Yuchi City, and I really didn't lose at all.

Zhang Xiong, Zhao Ruhui and the others were immediately confused again, believing that Chen Hai would never fail to think of this, and once the Longxiang battalion was equipped with such a curly-bladed chariot, which was used in conjunction with a heavily armored crossbow, how could it be possible to resist the poorly equipped demon barbarian soldiers?

Chen Haifei worked so hard to build a city with iron in Yucheng Ridge, and what he was guarding against was really a demon barbarian soldier?

Of course, Chen Hai didn't say anything, Zhang Xiong, Zhao Ruhui, and Guo Hong didn't think about it, but just asked: "Is this mining car to be made secretly?"

Chen Hai nodded, believing that Zhang Xiong and the others had also understood the great value of the mining vehicle structure, and asked Zhao Ruhui to supervise the manufacture of the mining vehicle, and then left Zhang Xiong to speak alone.

The Zhang clan was defeated under Yuchicheng, and more than 20,000 clansmen were exiled to Liquan by Chen Hai with Zhang Xiong, but Liquan was too narrow, and most of the Zhang clansmen could not even share the arable land to support their families.

Chen Hai wanted to move some of the Zhang clan to settle in Hengshan and Tongkou this time, so that most of the Zhang clan people could be separated and take root in Yandang Plain.

If you want to talk about a high-quality population, Chen Hai has 20,000 disciples of the Zhang family in his hands, and after several years of polishing and tempering, they should be able to use it a lot after grinding away their frivolity, arrogance and disdain for the bottom.

Zhang Xiong also knew that this was a good opportunity for the Zhang family to rise again in Yanzhou, and it was also a good opportunity for the real rise, so naturally he would not refuse, and seriously knelt down in front of Chen Hai, and called: "Everything is according to the orders of the lord!" He was really willing to throw himself into Chen Hai's account.

"Zhang Gong doesn't need to be polite, the world is difficult, we just support each other. Chen Hai helped Zhang Xiong up and said.

Worried about what would happen in the Blood Cloud Wasteland, Chen Hai returned to Tianji Cliff and found a clean room, urged the snake bracelet, and in a blink of an eye, he dived into the Blood Cloud Wasteland again.