The schematic diagram drawn by Li Qi directly crossed the button door and watt, and advanced the principle of the piston steam engine in one step to the technical level of the three-expansion and multi-expansion steam engines, which is a scientific and technological achievement made in the history of the industrial age in another time and space in the past 150 years.

“…… In short, after continuous experiments, you will be able to find that the steam turbine needs to push a large airflow when doing work, so it cannot be miniaturized, and the piston steam engine is much smaller because the size of the gas transmission can be controlled by pipes and valves, which is also the main reason why I want to focus on explaining the principle of the piston steam engine to you in this lesson. As for the specific process and experimental problems, you can solve them yourself, and the funds will be solved by He Quan to find the Shaofu Supervisor. ”

When Li Qi was in class, he claimed that he had always insisted on using "I" instead of me, putting himself on an equal footing with teachers and students in the college, and sometimes participating in some activities held by teachers and students at will, although it was a bit of a disruption to the atmosphere, but he had a very good relationship with the teachers and students from the college.

These people are the real foundation of his rule, although many courtiers have a lot of criticism about the Son of Heaven's preference for the teachers and students of the academy city, but they are also helpless.

Now, the first batch of students who graduated from the academy have begun to become middle-level officers one after another, becoming an intermediate force in the army. These days the protégés are gradually infiltrating the takeover of the army, a trend that no one can stop.

What these Northern Army nobles can do is to stuff their children into Jinyang Academy through various channels. In this regard, Li Qi was also very helpless, so he could only recruit as many civilian children as possible from the garrison army by expanding enrollment every year, so as to balance the forces of all parties.

Now that such a large group of nobles are in the same trench with him, he can't chill their hearts.

After transferring Xia Luqi back to the court as a privy deputy envoy, and then making the old father-in-law Wang Du Jin a Taishi, and placing him in Jinyang, Li Qi has quietly completed the transfer of the vast majority of military towns under his rule, and made the Jiedu envoy gradually become a kind of false title, separated from the local administration.

Plotting the world?!

This is nature, this is his world, and Li Qi is naturally responsible for this.

After the spring sowing, Li Qi set off again and went to Youzhou to inspect.

Pei Yue, the former defense envoy of Shanbei, was appointed as the envoy of Youzhou Town, and Li Qi ordered him to build a series of defensive fortifications along Jishui and build a solid defensive barrier.

Since the Anshi Rebellion, the lower reaches of Jishui and Chaobai River have fallen into disrepair, and because the river floods almost every year, a large area of uninhabited swamps has been formed.

Hundreds of years of war between the end of the Eastern Han Dynasty and the Three Kingdoms period caused the population of the Central Plains to drop sharply, and eventually led to the influx of grassland Hu people into the Central Plains. From the Northern Dynasties to the Sui and Tang Dynasties, they never regarded the northern grasslands as a threat, and the Chengguan in the Youzhou area had already been dilapidated due to disrepair. After Pei Yue took office, he sent more than 10,000 soldiers and civilians to re-expand and strengthen the Yuyang city wall and city tower, preparing to build this place into an important military town to resist the Khitan invasion.

Since Pinglu was still in the hands of the Khitans, the Tang army could only retreat and build the first barrier along Jishui to resist the Khitan invasion of the North China Plain.

In this era, the climate was quite mild, and the precipitation and rivers in the Youzhou area were much more than in later generations, and the forests and aquatic plants in the mountains were luxuriant. However, since the Anshi Rebellion, the grassland Hu people gradually moved here, and the countryside was barren, and most places became pastures. Especially in Lulong, there are about forty percent of the Hu people, of which the Xi people are the majority.

After inspecting Youzhou and Jizhou, Li Qi instructed the officials of Taifu Temple and Dushui Jian to continue to survey a suitable Tuntian area in Pingzhou, and then went south along the river accompanied by Pei Yue, from Wuqing to the mouth of the Haihe River, where the Yongding River, the Baigou River, and the Hutuo River converge. At this time, the surface of the Haihe River was several miles wide, and the river surface was much wider than I remembered.

After unfolding the map, Li Qi pointed to the rough sea chart he had drawn and looked at Yuan Xingkai, the envoy of Cangzhou who came with him: "General Yuan is from Youzhou, do you know the sailor?" ”

Yuan Xingkai shook his head: "I only heard that there is a naval army in Dengzhou, but the minister has never seen it." ”

Li Qi said: "I heard that the Goryeo and Ryukyuan people came to the Tang Dynasty, and they all came by sea and boat, didn't they come ashore from Youzhou?" ”

Pei Yue said: "I heard that in the early years, there were sea ships coming in Gukou, but since the Yizong Dynasty, there has been no news. Up to now, most of the Dengzhou sailors have been fishermen. ”

Li Qi was silent for a while and then asked, "Are there shipbuilders in the area of Youji?" ”

Pei Yue thought for a moment: "I only heard that there are fishermen going to sea in the Gukou area, but I haven't seen a big ship for a long time. ”

"Oh, then, find a way to find some craftsmen from Dengzhou who can build sea ships, I will be useful." This matter is also in a hurry, Li Qi just told Youzhou and Cangzhou to cooperate with the people of the Duzuo Institute to build two coastal wharves at Gukou and Wudi River Estuary. His plan was to build a port and shipyard here, ready for maritime trade with the South.

Silk and tea in the south were in high demand in the northern steppes, and after the sea route was opened, there were many benefits in the process.

In addition, Li Qi wants to start forming and training his own water army as soon as possible.

No one has done this kind of thing on the side of the Northern Army, so they can only look for and hire specialized talents outside, and it is a long-term matter to run a shipyard, build seagoing ships, and train sailors, and it will not work if you are in a hurry.

After Li Qi's inspection in Youzhou, he went to Weibo to inspect the local affairs of Tuntian District.

On the contrary, the effect of Jinyang's implementation of military cantonment in the North China Plain was not as obvious as that in the mountainous fringe areas.

Due to the extremely low efficiency of water pumping of waterwheels and overturned trucks in this era, the closer to the edge of the mountainous area, the easier it is to implement the new tuntian plan, but in the plain area, it is even more difficult to give full play to the advantages of Jinyang in water conservancy construction.

At this time, the precipitation in the Taihang Mountains was quite abundant, and some rivers in the North China Plain that were almost dry in later generations could be used. Only by building water conservancy facilities and allowing farmland to be irrigated can we ensure more food production and strengthen resilience to natural disasters.

Food is the foundation of people's stability and the most basic material guarantee for maintaining rule. As long as there is no shortage of money and food, and the recruitment flag is erected, someone will definitely come to vote. There is no way, the problem of water conservancy and irrigation in the plain area can only be completely solved by waiting for the steam engine to come out and using it to drive the pump.

After Xu Sijun Town defected to the Northern Army along with the Taining Army of Gunzhou, the area controlled by the Northern Army was already bordered by the Huai River and the Wu State, and the territory controlled by the Luoyang Imperial Court was only left in the Henan area of the later generations.

Since Shi Jingjiao fled into the Khitan, the only available troops at Li Siyuan's hands were Li Conghou's Bianzhou Army, Li Congke's Nanyang Army, and part of the Luoyang Forbidden Army, and the total number of troops was less than 100,000. Moreover, people's hearts are fluctuating, and the regime is in a state of turmoil and threaten to collapse at any time......

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