In the era of smoothbore guns, how to give full play to the defensive power of guns, the fortress is a threshold that cannot be crossed. In essence, Emperor Lu only needs to point out the mystery, and then he can make the teachers and students of the Wuluo Academy suddenly open.

Today's Great Qi does not need the huge amount of fortifications in the fortress, but the defense principle of the fortress can be completely borrowed and transferred to the fortifications of Lu Qi today. For example, the cannon placed on the bastion can shoot longitudinally at the moats in front of the side walls, so as to achieve an effective blockade, which is a very effective means and cannot be achieved by block cities.

The essence of the fortress is to change the fortress from a convex polygon to a concave polygon, so that no matter what point is attacked in the castle, the attacking team will be exposed to more than one bastion surface (usually 2-3), and the defender can use crossfire to perform multiple strikes.

The horse noodles in China's city fortifications did the same thing, but they never broke through the overall limit.

Emperor Lu remained silent because he felt that asking the teachers and students of the Wuluo Academy to break through that barrier by themselves would make them give them greater stimulation and stimulation in military thinking and ideology.

In fact, Emperor Lu was a little worried. You must know that in the 17th century, during the Russian conquest of Siberia, they established military bases along the river, which were actually very rudimentary. It was only in the 18th century that the construction of stone castles began in Siberia.

Emperor Lu only realized that the rule of the Central Plains over the grasslands was inseparable from the castles that were connected into several chains, after all, the Central Plains people were not suitable for the nomadic life on the grasslands, and at the same time he was unwilling to destroy the weak ecology on the grasslands. The consequences of the large-scale migration to the north and the cultivation of the land have been shown by the sandstorms and patches of desertified land in the north in later generations. In the end, China will bear the consequences.

Of course, this does not mean that there is really no land suitable for cultivation on the vast grasslands in the north and south of Yinshan Mountain. In later generations, Inner Mongolia had a golden area of 6 million hectares of cultivated land, not to mention the Hetao area, the eastern grassland area east of Yinshan Mountain, and the area near the northeast, many places are suitable for agriculture.

Don't think that Inner Mongolia in later generations will be all pastures and animal husbandry, Inner Mongolia is one of the five provinces with a net transfer of grain from the country, and the per capita grain reserves and per capita grain holdings are among the best among the provinces in the country.

But that doesn't hide the troubles lurking in the prairie Midwest. There are hundreds of thousands of nomads living there, but there is no suitable land for farming, and the Central Plains people cannot enter there, which means that the nomads in the central and western regions of the grassland will maintain the purity of their blood to a certain extent. This means that the power of the clan leader will be invisibly magnified.

This is very much like the clan power of the Central Plains. Because the cost of ruling and inheriting is too great, the government will choose to cede the rights of the bottom to the clan in the trade-off. Emperor Lu was just as much out of reach as the depths of the prairie, and he wanted to form an effective control over the other side, so he could only rely on his own tribal leaders in this situation.

Because in the vast prairie, it is far more realistic and feasible to control the tribe than to control the grassland herders who are family-based.

To a certain extent, there is essentially no difference between the clans in the interior and the tribes in the grassland! It's just a big and a small, one is close to the imperial power, and the other is far from the imperial power.

In order to effectively dominate the countryside and get the maximum benefits with the least effort, the government reluctantly chose the clan; In order to rule the grassland, Emperor Lu had no choice but to choose a tribe. Both are choices made as a last resort because of the cost-effectiveness of the costs and benefits of domination.

In order to better control the tribe, Emperor Lu had to station a certain number of soldiers and horses on the prairie to form a certain deterrent. In this way, the construction of a fortress on the steppe is an indispensable measure.

Just like the Russians who conquered Siberia, because their numbers were much smaller than the natives, without the castle as a cover, they could neither bear the attrition of long-term mobile warfare, nor resist the resistance of the local people, so they could only build castles, and the establishment of castles here and there provided shelter for the Russian invading army to attack and retreat.

This is the same consideration as Emperor Lu. It's just that Emperor Lu obviously didn't know that the first Russian castles in Siberia were rudimentary wooden fortifications. A square building made of logs, with a side length of about 15-20 Russian zhang, that is, about 30 to 40 meters, and one Russian zhang is equal to 2.134 meters. The castle was surrounded by two layers of wooden fences filled with stones, wooden fences, and moats dug outside the walls. There are towers at the four corners of the city wall, some of which have lookouts, some have "alarm bells", and there are gun holes on the fence walls and towers. And in the city they built high posts with mounds of earth, erected cannons, and dug wells. Inside the fence were houses for Cossacks and weapons and ammunition depots, etc.

Later Russian cities in Siberia were like this in the early days. It was only with the increase in their rule over the local natives that the castle area was expanded and the number of buildings in the castle increased (Overseer's Palace, Customs Office, Prison, Mall, etc.).

It's the first battle of Yaksa, and the fortress of Lao Maozi is still like this. Therefore, it was vulnerable in front of the artillery of the Qing army, and the city of Yaksa fell in one day. That is, in the second round, the Russians only after suffering losses built a simple half-ridge fortress offensive, and it was equipped with twelve artillery pieces, and then the Qing army could only besiege until the Russian army was exhausted. [The latter fought for half a year, and sixty-six of the more than 800 Russians died. The Qing army also knocked out two reinforcements of the Russian army outside. It is undeniable that the Qing army invested more troops than Lao Maozi, but it was not tens of thousands of Qing soldiers who tactically surrounded Lao Maozi. That is no longer in the Black Manchu Dynasty, but in Black China. In the two battles of Yaxa, the casualties of the Qing army were smaller than those of the Russian army. 】

By the end of the 17th century and the beginning of the 18th century, Lao Mao Zifang began to build large-scale stone castles in Siberia.

Lu Qian didn't know much about Lao Maozi's conquest of Siberia, he just hated Lao Maozi's military strategy. Relying on castles and sophisticated weapons to deal with cold-armed enemies who are only equipped with bows and arrows, swords and guns, you can effectively preserve your own vitality.

For the teachers and students of the Academy, this is a major mission. Their strategy even determined the layout of the imperial court on the grassland in the future, which was of great significance, making everyone feel a lot of pressure. Although the teachers and students of the Wuluo Academy also know that such a mission, the people of the Governor's Mansion of the Five Armies will inevitably receive it. It's a competition!

The Governor's Mansion of the Five Armies has the most experienced war in the current Qi army, and the Wuluo Academy is also the first military academy in the Central Plains today, with a large number of former generals in it. These people's understanding of firearms is basically at the same level, Lu Qian gave them the most basic gun performance data, and also let them know what a musketeer line is......

He felt that in the process of discussion and collision between the teachers and students of the Wuluo Academy, these people would definitely be able to form a deeper understanding of guns.

Emperor Hengzhu Lu didn't need to come to a conclusion now, there was still enough time for the Governor's Mansion of the Five Armies and the Wuluo Academy to study, verify, and discuss it back and forth.

The daughter of the Zhao family was not much touched by Zhao Jiu'er's death, and there was a certain amount of sentimentality, but it was never so strong that she was overwhelmed with grief.

Children of the royal family, unless they are siblings of the same mother, where does the brother-sister friendship come from?

The conflict between the princesses and princesses is certainly not as good as the competition between the princes, but it is more of a friendship on the surface. If it is true that sisters will have a heart-to-heart, in the chaotic harem of the great artist, in the situation where the favorite concubines are endless, whoever has a heart-to-heart will be mixed up at home.

If so, this Emperor Maode only shed two tears in front of Emperor Lu, and then revealed the matter. Why do you say this, this is because Lu Qian can see clearly that the air column on the head of the Zhao family girl has almost no change.

The Zishui Race Course is making gold every day, and the Jockey Club is also beginning to show its edge, and the name of the Kong family has not yet been played, because the second and third cornucopia has not yet been determined where to put it.

However, the human power firm made a fortune from Goryeo.

Taking advantage of the fact that Wang Kai was attached to the above table, Emperor Lu first came to settle Wang Kai and his party, such as giving him the title of the mansion and properly accommodating the Goryeo officials who accompanied him, and then officially issued a decree to all parties in Goryeo. The manpower trading firm took advantage of this gap to transfer tens of thousands of people from Goryeo to Ganghwa Island.

The Department of Mineral Development under the Ministry of Industry is waving banknotes all day long to 'recruit' laborers. On Sado Island, east of the peninsula, there is a mine supervisor with a population of nearly 100,000.

The garrison here was only 2,000 men, but the annex was simple, the largest branch belonged to the hospital, and the most important was the bank.

All the subordinate personnel are concentrated in small towns, with a total population of less than 1,000 people.

In other words, the East China Sea Mine Supervisors, with a population of nearly 100,000, except for the 3,000 and insufficient garrisons and auxiliary personnel, were all miners and their families and children, as well as slave laborers who were lower than the miners.

Ma Dashen said that capitalism came to the world, from head to toe, and every pore dripped with blood and filth. That's not bad at all.

Because profit is really a catalyst for people to constantly break through the lower limit of morality.

Emperor Lu originally only used prisoners of war to mine gold and silver mines, but these prisoners of war were Han Chinese, and Emperor Lu was not prepared to use prisoners of war as coolies. Therefore, after spending the first few years of hard work on the islands in the East China Sea, and when the overall situation of the Central Plains has been decided, many people have been sent back to China one after another. There are also many miners who have been converted into mine supervisors, and although life is still hard, their status has changed dramatically, and they have a lot of salaries.

In particular, after the gold and silver of Sado Island were mined on a large scale, the wages of the miners were really not low.

However, there is more than one mine in the huge Sado Gold Mountain, and the opening of one pit and one mine means that a large number of labor needs are required. Moreover, because of the danger of mining and the death and injury compensation of miners, the Ministry of Industry and the mine supervisor themselves chose to cooperate with the human power firm almost without hesitation in order to maximize profits.

Batches of slave laborers were brought in, and batches of people were buried on the island.

They eat the worst, work the most, and don't need to be paid......

The Ministry of Industry, and even Lu Qian himself, had to compromise in the face of irresistible interests. The moral bottom line is to keep falling down in the irresistible temptation again and again.

Why is the business of the human power firm so prosperous? The biggest reason is that Emperor Lu acquiesced to the use of slave labor by the mine supervisors under the Ministry of Industry, as long as they were not people from the Great Qi Household and the People. Now he can only use this to clear the sin in his heart. Although he knew very well that his heart was already black and shiny.

If this is a world where the Tao is manifested, his sins will definitely be able to attract the thunder of God.

Therefore, the three feudatories of South Vietnam do not need to specifically hint that they themselves are merciless to the South Vietnamese. Villages were swallowed up because of a slave trader.

In the previous life, the evil slave trade, which only stayed in the history books, has been silently unfolded in the high-profile clamor of Emperor Lu's 'Han'er is not a slave', and it has become bigger and bigger in a few years. It became a great source of profit for the small treasury of the royal family.

On Nasado Island, many of the original prisoners of war are no longer there, and the rest have been converted into miners. Of the 80,000 prisoners of war who are still stranded on Sado Island, Ganghwa Island, Jeju Island, and other places, it is estimated that there are not even 20,000 people under the Tokai Governor's Office. Many people are looking forward to returning to their hometowns if they can.

Many of those who remained have changed their roles or become employees of local farms, where large farms have been established to facilitate the supply of Sado Island, with large tracts of fertile farmland on the islands of Ganghwa, Sado and Jeju. The new-style wheel plough and the three-nursery system and the two-nursery system were first experimentally implemented in these places, and the results were very good.

Except for those who changed roles and became captives of farm employees, the rest of them were either overseers, or miner leaders, and even some of them used knives and guns to become mine guards.

In this way, these people also stayed on the island. Those who have a family in their hometown and can still be contacted, naturally try their best to connect to the island. And those who can't be contacted, or who haven't married a wife and had children at all, then they need to look at the human business to solve their worries.

Not to mention anything else, just the chaos of Goryeo these days, I don't know how many Goryeo Ding Zhuang entered the pit and mine under the Luqi Mine Supervisor, which is not only a Sado Island; How many Korean women have been allowed into the backyard of the Chinese people, and there is more than one Sado Island.

Just like the tens of thousands of Koreans mentioned earlier, men are a group, women are a group, and some children with extraordinary "qualifications" are another group.

In the Chinese market, the market of Korean men and women is much better than those black guys in South Vietnam.