back to ancient times to be emperor

Chapter 193 Kapok
Lu Chengqi studied the map carefully, and found that the border between Koryo and Dashun, apart from the Yalu River, there was no place to attack.In other words, as long as the area around the Yalu River is defended, Goryeo has little to do.

It's just that Dashun's territory only covers the lower reaches of the Yalu River, not the entirety of the Yalu River.The lower reaches of the Yalu River are the dividing line between Dashun and Koryo; the middle reaches are the dividing line between Koryo and Liao; the upper reaches and Changbai Mountain are the dividing line between Koryo and Jurchens.

In fact, Goryeo is really not easy. Being caught between two superpowers, there are unspeakable sufferings, and there is also a Jurchen neighbor.In fact, Jurchen's harm to Koryo was far greater than that of Liao.Goryeo changed to serve as the suzerain state, in fact, it was to make the Jurchens refrain, and stop coming to trouble Goryeo.After all, the strength of the Liao Kingdom is known to the Jurchens.Even between Jurchen and Khitan, there have been many wars.

In order to resist the burning, killing and looting of the Khitans and Jurchens, Goguryeo, the predecessor of Goryeo, also learned from the Central Plains and spent 16 years building the Great Wall.Because of the terrain, the Great Wall of Goguryeo is only a thousand miles away.When the Wang family usurped the Gao family's Goguryeo, the Great Wall seemed to be of no use.However, as Goryeo's status gradually became embarrassing, the Great Wall finally came in handy.There was Jurchen in the front, Liao in the middle, and Dashun in the back. Goryeo had to station troops on the border for defense.

According to the attributes of the farming nation, the defense must be to rely on the city to defend. With such a long battle line, it is natural to build a city wall.This is why China can build the Great Wall, the battle line is too long...

Now that Dashun had fallen out with Gao Li again, Gao Li naturally did not dare to take it lightly.Liao State and Dashun signed a three-year non-aggression pact. What if Dashun took this opportunity to attack Korea?This is not official history. Both the Sui and Tang dynasties failed to attack Koryo, which made Koryo Bangzi no longer afraid.On the contrary, Koryo has always had a good relationship with the major powers of the Central Plains. The major powers of the Central Plains are a terrible opponent in the eyes of Koryo. If the major powers of the Central Plains attack Korea, it will really be a mess.

In fact, it is impossible for Dashun to attack Goryeo at this time.Because at this time, the global climate has entered the Little Ice Age.Don't think that the Little Ice Age only existed in the Ming Dynasty. Even in official history, the Song Dynasty corresponding to Dashun also had a Little Ice Age.Although there were no meteorological instruments to observe climate changes in ancient times, there were rich "phenological" records. "Phenology" refers to when people observe during a year when frost and snow fall, rivers open and rivers freeze, plants bloom and bear fruit, migratory birds come and go in spring and autumn, and so on.China is based on agriculture, and in order to meet the needs of farming, there have been observations of "phenology" since the Western Zhou Dynasty.

According to records, in Chang'an, the capital of the former dynasty, there were still plum trees and oranges in the imperial palace, and there was no record of snow in Chang'an.Until more than [-] years ago, Chang'an could no longer plant plum trees, and there was heavy snowfall every year.Since his rebirth, Lu Chengqi also felt that it was different from the urban heat island effect of later generations, that Chang'an City was really cold.Without a brazier in winter, there is no way to stay in the house.

The growth of lychees is also a good proof. More than [-] years ago, Chengdu also grew lychees, but now only Meizhou, the hometown of the great talent Su Shi, can grow lychees.All this shows that the temperature at this moment has indeed entered a very cold period, even the small ice river in the late Ming Dynasty is nothing more than that, right?History can be changed, but the temperature cannot be fooled. The Little Ice Age is coming as scheduled.

In such cold weather, let alone attacking Korea, even defending your own country is fine.Lu Chengqi even suspected that the demise of the Song Dynasty had a lot to do with the weather.When the Jin Dynasty destroyed the Northern Song Dynasty, it happened to be the middle of winter in December.Note that this is December of the lunar calendar, and it was the Little Ice Age at that time. The Han people in the Central Plains did not have any cotton-padded jackets to keep out the cold. The main clothing materials used by the poor were linen or other fabrics made of plant fibers. Silk and satin belonged to the upper class. Or rich people's.Common people, in winter, they have to wear shorts, straight jackets, hoods, etc. when traveling.If a wealthy family wears silk and satin, they will also wear a crane cloak, which is a very expensive fur coat. There are also various fur capes and hats, which are completely different from ordinary people.

Most of the unborn soldiers are miserable poor people. When the enemy strikes in winter, they don't even have [-]% of their usual strength. How can they defend against the enemy?Naturally, it was a disastrous defeat... The nomads are different. Most of the clothes they wear are animal fur, which are warm and thick, and their activities in winter are not inferior to those in summer.Under the ebb and flow, it is not uncommon for Jin to destroy the Northern Song Dynasty.

Of course, there are many other factors involved. Key factors such as the policies of the Northern Song Dynasty, civil servants, and the army were also fatal.If you don't want to repeat the same mistakes, you have to change a little bit.

To change dressing habits, the development of cotton is naturally the best.Even if you can't find cotton for a while, you can find a substitute, kapok.Lu Chengqi remembered that there were a lot of kapoks in the Fujian-Guangzhou area. If they were planted vigorously, they would be able to solve the problem of keeping warm from the cold.

After solving the problem of keeping warm, Dashun dared not say that he had the strength to attack, and he was able to protect himself after Chi Dao was repaired.

After thinking about it, Lu Chengqi felt that this matter should not be delayed, so he hurriedly called Li Jie, the newly appointed Shangshu of the Ministry of Industry, because he really couldn't think of anyone who could do this matter.When Li Jie was interviewed by Xuan, he didn't dare to hesitate, and quickly followed the servants to the palace.

It is impossible to say that Li Jie is not disturbed.Just a few days after taking office, he was summoned for an audience, "Is there something wrong with me?" Li Jie had to think so.

After entering the Chuigong Hall, Lu Chengqi, who was studying the map, looked up at him, and asked, "Li Qing, can you read a map?"

Who is Li Jie?A man of erudition and talent, let alone maps, he can draw detailed engineering drawings.Immediately said: "Return to Your Majesty, I understand a little bit." Li Jie had never been to this Chui Gong Palace, because he did not have the qualification before, so naturally he could not enter the Chui Gong Palace to meet Lu Chengqi privately.

"Then what does Li Qing think of this map?" At this moment, Lu Chengqi also had a hint of showing off in his heart.After all, the world map behind his desk and chair has gathered the greatest strength of the Supervision Department, and the map drawn after field survey is much more accurate than any other map.With Lu Chengqi's knowledge, even if this map is not completely correct, it can still be correct by six or seven points.In this era without satellites, it is also a very powerful thing to achieve this level.Unlike the other maps presented to the emperor, the mountains, rivers and rivers are depicted in a realistic way, but the proportions are worrying.Perhaps it was to make the emperor look better and understand, so the mountains and rivers were drawn so three-dimensionally.But if the proportions are wrong, no matter how delicate the painting is, it will be in vain.

Li Jie is everyone, so he can understand this map naturally.Combined with his own knowledge, Li Jie suddenly discovered that this map was even more accurate than he imagined, so he couldn't help looking at it a few more times, and said: "Your Majesty, who made this map, it is simply a treasure in the world! "

Lu Chengqi smiled and did not answer, but asked instead: "Li Qing, I came to you not just to look at the map. As the Minister of the Ministry of Industry, besides being in charge of the world's water conservancy, farming, transportation, etc., you also have to take care of the people's health and well-being. Two?"

Li Jie was taken aback, and said honestly: "Your Majesty, I have never heard such a statement."

(End of this chapter)