After the land of Samhan has been invaded and most of it has been occupied, it is possible to establish Obibang County. That's what Gongsun Kang did in history. We can't lag behind the ancients, can we?

As for the candidate for the county guard of Obifang County, Gongsun Kang has already thought about it: Guoyuan.

Guoyuan, Zini, is a native of Gai County, Le'an County. Zheng Xuan, a master of scripture at the end of the Han Dynasty, is now following Guan Ning and Bingyuan to avoid chaos in Liaodong. At first, like Guan Ning and Bing Yuan, he was reluctant to come out to be an official. Gongsun Du was very angry and did not force them.

In the past year, 800,000 displaced people from Qingzhou have been resettled in the three counties of Liaodong, where they have stabilized their work and land reclamation. Guoyuan saw the future of Liaodong's great development, so he came to the door to recommend himself: "I still know a little about the reclamation of Tuntian. ”

Gongsun Kang knows the person Guoyuan, he doesn't just know a little. Historically, Cao Cao's tuntian and logistics all relied on the national yuan. Gongsun Kang had already sent intelligence officers to monitor Guoyuan, whether he was lecturing or farming in Liaodong, no one cared about him; Once he wants to return to the Central Plains, kill him immediately, and definitely not leave this talent to Cao Cao.

Of course, Gongsun Kang also has this attitude towards Guan Ning and Bing Yuan, this kind of treatment.

Now that he's stepped up on his own, he's absolutely happy. Therefore, Gongsun Kang suggested that Gongsun Du let Guoyuan be responsible for the reclamation of the fields and the resettlement of the displaced people.

In the past year, with the great war of the princes of the Central Plains, through the two places of Qiyan and the waterway, there have been more and more displaced people who spontaneously run to Liaodong, and they are no longer only displaced people from Qingzhou.

Next year, Cao Cao slaughtered Xuzhou, and even ate human flesh, and it is conceivable that the now wealthy people of Xuzhou will also be displaced, become displaced people, and disperse in large numbers. In fact, Zhuge Liang's family was also forced to leave Xuzhou and relocate to Jingzhou because of Cao Cao's inhumane slaughter policy. This also caused Zhuge Liang to completely oppose Cao Cao and be on the bar for the rest of his life.

The population of Liaodong is increasing, and the transportation of materials is becoming more and more frequent. Making cement and building roads was put on the agenda.

The reason why I didn't do this before was because clearing wasteland was the most important thing. Only when the soldiers and civilians of Liaodong are full can they do things that make life better.

Portland cement production process can be divided into raw meal preparation, clinker calcination, cement making (grinding) and packaging.

Cement is finely ground and mixed by limestone, clay and iron ore powder in proportion, and the mixture at this time is called raw meal. Then calcination is carried out, the general temperature is about 1450 degrees, and the product after calcination is called clinker. Then the clinker and gypsum are ground together and mixed in proportion to be called cement. The cement at this time is called ordinary Portland cement.

Gongsun Kang didn't want to make it so complicated, there was no need for such a good road surface in this era, and he planned to use the soil method to make cement.

How to make cement by soil method? The limestone and clay are ground into flour and then calcined into mature material. Grinding with clinker and slag left over after ironmaking is cement.

Simple production process, no difficulty; Displaced people everywhere can be given relief through work; It's really not good, you can go and catch thousands of Sanhan natives to come back to work, and even save your wages. So it's not difficult to build roads. Although the repaired road is not as good as the worst cement road in the 21st century, it is an epoch-making miracle in this era, and it is the best road in the world.

Everything was not difficult, and the construction started smoothly. The first is to build three high-speed inter-county roads from Liaodong County to Xuansu County, Liaodong County to Lelang County, and Xuansu County to Lelang County. The width of the highway is required to be able to run eight carriages at the same time.

The candidates who preside over the road construction in sections are all talents recruited by the recent merit-seeking order. Although they have not left any traces in history, they are still fully competent to do this kind of work of organizing and arranging migrant workers to build roads.

The three counties of Liaodong employ a total of 150,000 civilians, who are in charge of food and shelter, and are paid 50 copper coins a day. In addition, Gongsun Kang transferred 100,000 strong foreign slaves to participate in the construction of the road. A total of 250,000 manpower, and at the same time, hundreds of sections of construction sites were started to build roads.

There are not many mountains in Liaodong, and there are some hills. The black powder researched and produced by Zhang Wenyuan came in handy. When encountering a hill blocking the road, it explodes categorically, and the gravel can be mixed into the cement pavement to repair the road. When encountering a river, arched bridges are also built with iron bars, stones and cement. Looking at the seriousness of the construction of the migrant workers, it is estimated that it will not collapse for hundreds of years.

Since the advent of explosives, Gongsun Kang has never used them on the battlefield, and he has not yet used explosives against the natives. Now it's time to open the way, just in time to test the power of the explosion. The craftsmen of the artisan camp followed all the way, recorded all kinds of data, and made targeted improvements after they returned.

Will the explosives that can blow the mountain open not blow up the city walls? Gongsun Kang never doubted this.

If the explosives can be controlled in a directional way, Gongsun Kang plans to use it to open mines, and there is no doubt that it can increase the efficiency by dozens of times.

Xun Yue, Wang Lie, Cheng Yu, Guo Jia, and Xu Miao were all at the scene, watching the power of explosives. Gongsun Kang repeatedly asked them to retreat to a kilometer away. These strategists did not know the power of the explosives, but Gongsun Kang did. In case anyone is killed or disabled, Gongsun Kang will have no place to cry.

At the site of the explosion, ropes were pulled up and a large open space was enclosed. There was only one craftsman in charge of lighting the fire, and the rest of the onlookers were also expelled to a kilometer away.

The craftsmen buried the explosives packets, ran hundreds of paces away, lit a lead hundreds of meters long, and ran frantically out of the rope. The leads are soaked in essential oils and will not go out even in the wind.

With a sound of "coaxing", the ground shook and the mountains shook. Even though the surrounding crowd of onlookers had been informed in advance of what was about to happen. Many people are still stunned by this inhuman power. Some fools fell to their knees and begged God for forgiveness.

The rocks flew hundreds of meters away. Look at the hill that has fallen and become finely crumbled. Cheng Yu's eyes shone with a terrifying light. "Great. The Lord has the power of heaven and earth. ”

Xi Zhicai looked surprised, "The Lord is the reincarnation of Thor, these are all trivial." ”

The theory of the reincarnation of Thor, with the return of the soldiers who conquered Kyushu Island, gradually became popular in the army and among the people. Knowing this is good for your own rule, and it is much better than Gongsun Du's artificial miracles. Gongsun Du and Gongsun Kang's attitudes are all resigned. It is not prohibited and does not actively promote.

But Gongsun Kang's invention of soap, wine, whale oil refining, cement and now explosives, one by one, one by one, and one by one items, all made a perfect proof of Thor's reincarnation.

The use of explosives greatly improves the efficiency of construction. Each stretch of highway stretches straight forward at a rate of several miles a day. It is expected that all three inter-county roads will be completed by the onset of winter.