"The sudden drop in temperature and the huge temperature difference between day and night made it impossible for the Mongolians to survive, so the Mongols had no choice but to go south, and they had no choice but to go south!" Zhu Gaochi murmured.

"That's it, that's it."

Xia Yuanji's eyes were a little complicated. Originally, he just thought that Master Jiang knew politics, economics, and could make fertilizer elixirs, but he never expected that Master Jiang was actually an all-rounder!

A true all-rounder, he knows everything about astronomy, geography, history, politics and economics.

If Jiang Xinghuo told him that this is just basic education that will be popularized by everyone in the future, and that all ordinary children will learn it after more than ten years, I don't know if Xia Yuanji will be speechless and choke.

At this time, Zhang Yuchu and Zhang Tianshi were also in very complicated moods.

If we say at the beginning, Zhang Tianshi felt that Jiang Xinghuo's suggestion that "the Little Ice Age would lead to the demise of the Ming Dynasty" was alarmist and was a deliberate attempt to avoid shocking people.

Then as Jiang Xinghuo's lecture progressed, he took them into the history of China from the beginning, reviewing the movement of precipitation lines caused by temperature, and the impact of the movement of precipitation lines on the Northern and Southern Dynasties, Sui and Tang Dynasties, Tubo, and the countries in the Western Regions.

Zhang Yuchu had to admit that temperature does have an impact on the form of a country.

After all, temperature actually affects food production, which in turn affects population, tax revenue, and national stability.

But even when talking about Loulan's demise, Zhang Yuchu didn't look moved.

But, but.

After Jiang Xinghuo proposed the concept of "specific heat capacity" and explained the situation that was completely different from his understanding, Zhang Yuchu suddenly remembered something.

——Feng Shui!

This is so similar to Feng Shui!

In other words, isn't this the so-called search for dragons and pulses, and to hear the wind and read the water?

However, Feng Shui has been passed down for thousands of years, and no matter who wrote the book, it is extremely obscure and difficult to understand.

Although passed down by masters and apprentices, Feng Shui masters and Taoist priests can make Feng Shui judgments and even change Feng Shui based on the experience accumulated by their predecessors.

Show people the mansion and choose the cemetery.

But what kind of ability is this?

This Feng Shui technique is so powerful that it can help the emperor find dragon veins and choose his mausoleum.

Other than that, can anything really change?

Nothing can be done!

However, Zhang Yuchu once saw a record in the Longhu Mountain classics that he did not know whether it was true or false.

In this world, there really is a science that can clearly see the feng shui of the world. It is not limited to one city or one place, or even one country or one dynasty!

And this knowledge is the real "Feng Shui".

As for the things spread in the world, they are just superficial. At best, they can only be called "Feng Shui".

This is the relationship between "skill" and "dao".

No matter how thoroughly you learn the "skill", no matter how clearly you practice it, and no matter how skillfully you use it, you are just an ordinary person.

And the real "Tao" is what can change a hostage!

In that classic book, this true "Feng Shui" is recorded, which is only in the hands of immortals!

Because only the immortals who are high above can overlook the world.

And this world is by no means limited to the Ming Dynasty!

It is not even limited to North Korea, Japan, Champa, and Annam, but includes farther and wider areas.

At one time, Zhang Yuchu thought this was nonsense!

Why?

Because with the current level of understanding of the world and the speed of movement, it is impossible for anyone to truly see through the Feng Shui of the entire world. Just walking carefully around the Ming Dynasty would take countless years and how terrifying it is.

energy.

Not to mention, traveling around all the known and unknown worlds?

To take it a step further, even if you travel around the real world, can you really master it?

Therefore, there are only immortals!

Only immortals!

Immortals are high up in the sky, fishing for human luck, so they naturally know all the mountains, rivers, and wind directions in the world.

One sees it in the sky and the other sees it on the ground. How can they compare?

Therefore, Zhang Yuchu believes that this so-called true "Feng Shui" is simply not something that ordinary people can master.

But today, Zhang Yuchu suddenly had a bold and somewhat terrifying idea in his mind.

Could it be that what Jiang Xinghuo is talking about is this legendary knowledge that only immortals can master?

In fact, it is not surprising that Zhang Yuchu had such an idea.

After all, in this world where there had been no great geographical discoveries and no successive navigators had devoted their lives to exploring the global ocean currents and monsoon conditions, it would indeed be impossible for a "mortal" to master the world's wind and water.

In later generations, it was completely different. There were not only summarized information, detailed and simple and easy-to-understand pictures, but also satellites hanging in the sky as the "eyes in the sky" to monitor the changes in wind and clouds and the dynamics of ocean currents all the time.

It is not surprising that Jiang Xinghuo can say these words in this era, and Zhang Yuchu thinks that he may truly master "Feng Shui".

Having said that, this is just a guess that Zhang Yuchu and Zhang Tianshi accidentally made in his mind. There is no conclusive evidence. After all, although what Jiang Xinghuo said is related, he still needs more evidence to prove what Jiang Xinghuo said.

It is the legendary "Feng Shui".

Next door, under the new crooked neck tree.

Jiang Xinghuo's words continued.

"You have all played games simulating the Yuan Dynasty before, so I won't go into details here. You should be very clear about how much impact continuous natural disasters will have on the country's finances and national destiny."

Li Jinglong and Zhu Gaoxu nodded, showing expressions that they couldn't bear to recall.

It hurts, it really hurts!

These things that happened in real history, and the choices that they experienced personally, all prove that the short life of the Yuan Dynasty must be related to the continuous drop in temperature.

When the Mongols were on the grasslands, they lacked water bodies with a large specific heat capacity, so they were forced to go south and west to conquer the world. But even if they obtained land close to water bodies with a large specific heat capacity, they did not have to suffer from temperature differences. They still had to face the problem of temperature.

Huge problem.

"So what Mr. Jiang is saying is that the temperature drop that the Ming Dynasty is facing has actually started since the Southern Song Dynasty?" Li Jinglong asked with some frustration.

"right."

Jiang Xinghuo agreed with his words, but added: "Of course, the temperature does not drop all the time. There will be a period in between, such as the time when the Yuan Dynasty was established and the Southern Song Dynasty fell, the temperature actually rose for a while.

, but then it turned around and continued to descend.”

"You don't have to worry too much. The temperature will not drop all the time in the Ming Dynasty. If nothing else happens, there will be a period of rise in the middle, and finally it will turn around and plummet like in the Yuan Dynasty."

Hearing these words, the two of them looked embarrassed.

What does it mean not to worry too much?

Why does it sound like a doctor saying to you: "Don't worry, although it is a terminal illness, there will be some recovery in a few months. Once the recovery is over, it will deteriorate rapidly."

"Will the future of Ming Dynasty really be like this?"

Zhu Gaochi's expression in the secret room also became extremely solemn, and he even felt cold all over - the wheel of history was rolling forward, and there was no turning back.

At this moment, the results Jiang Xinghuo gave were unacceptable.

No one would be able to accept it.

Not to mention that the patient's family members are emotionally unstable, the patient will soon have an emotional breakdown.

The reason why Zhu Gaochi was so optimistic before was that he initially felt that the so-called "Little Ice Age" might only last a few years, or at most a dozen years. The imperial court only needed to build extensive warehouses to accumulate grain like the Sui Dynasty.

In the consecutive years of disaster, we can survive by tightening our belts.

Later, although Zhu Gaochi heard Jiang Xinghuo say that the Little Ice Age would last for hundreds of years, because he had not turned around at the time, he thought that the combination of chemical fertilizers and Jiang Xinghuo's method of increasing the upper limit of the supported population by 30% was

Can withstand the Little Ice Age.

However, as time went by, Zhu Gaochi immediately discovered his mistake.

Once food production increases and the upper limit of the population that can be supported increases, it will inevitably lead to a surge in population!

If the Ming Dynasty faces a continuous warm period in the future, this situation is not bad, and it will greatly enhance the national power of the Ming Dynasty. After all, in the early years of the Ming Dynasty, the actual situation faced by the Ming Dynasty is actually more people and less land.

The number of common people is different from that of the feudal king. The more common people, the better!

But now Jiang Xinghuo has truly explained the Mongolian example.

In order to avoid the torment of the temperature difference, the Mongols were about to conquer the entire world, except for the King of Zhennan who failed to capture the city three times.

But no matter what, the Mongols did run out of the grasslands.

The result was only a delay of less than a hundred years. The continuous drop in temperatures during the Little Ice Age still caused chaos in the world.

The Ming Dynasty is different from the Mongols. If we encounter the Little Ice Age in the future, where can we go?

Heading south to Champa?
To be continued...