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"It's too real, it's too outrageous. This original king must be a great talent that only appears in four thousand years. He actually compiled these astronomical and meteorological data so accurately and appropriately. It's incredible!" Wei in the data room Zhonghua continued to sigh while continuing to calculate.
He has been in this data room for nearly half a month. During this half month, it has provided more detailed information about astronomy and meteorology in the "General History of the Three Kingdoms" and "General History of the Western Han Dynasty". I picked it up and then made a weather model for verification. I found that the entire model was extremely accurate and breathtaking, as if there really was a world called China and more than 400 years of Eastern and Western Han Dynasties.
Unlike Xiuyan who directly uses a super quantum computer to perform calculations, Wei Zhonghua does not even have a decent computer and can only rely on an old computer with a history of more than 60 years in the data room for assistance. At the same time, it is assisted by paper and Bi came to undertake the main calculation work, and then the construction of the meteorological model was completed.
"By the way, according to this calculation model, around 120 AD, the climate of the entire Chinese world will change and enter the second cold period. Then there will be many abnormalities in the climate during this period. I Look, it seems to be the period of Emperor Xuan of the Han Dynasty in the General History of the Western Han Dynasty!" Wei Zhonghua muttered. According to his research, judging from the time when there are climate records in the General History of the Western Han Dynasty, there have been two warm periods and two warm periods in the entire history of China. cold period.
The first warm period was probably around 2000 BC to 1000 BC, which was the Xia and Shang dynasties. During this period, the climate in the entire China region was very warm, because the data states that there were a large number of people near the capital of the Shang Dynasty at that time. The broad-leaved forest is a type of tree that can only grow in warm climates.
Then there will be the first cold period, between 900 BC and 800 BC. Although it only lasted for 100 years, the climate was extremely cold during these 100 years. There is even a story in this book that the entire Yangtze River was completely frozen. record.
After that, from 800 BC to around 120 AD, there was the second warm period. During this period, the temperature in the entire Huaxia region began to rise again, so that the climate in Xiqi became pleasant, and the entire northern Shaanxi Plain became a global The most fertile land in China.
After the end of the second warm period, the second cold period naturally ushered in, and this cold period lasted for nearly 600 years. The history of the Han Dynasty that Wei Zhonghua has learned so far is also in this period. During a period of cold, all historical data on climate ended there.
However, since the model has been made, Wei Zhonghua naturally followed the model to make predictions, and finally concluded that the second cold period would last for about 600 years, and would probably end around 700 AD.
After that, China will enter the third warm period, which will last for about 400 years until it ends around 1100 AD, and then enter the third cold period.
The third cold period will last for 200 years, which is around 1100-1300 AD, followed by the fourth warm period.
The calculation of the fourth warm period is not so accurate. Wei Zhonghua estimated that it would be around 200 to 300 years, and it would end in 1600 at the latest.
The subsequent fourth cold period will last for about 500 years, until the cold period ends around 2100 AD, and China will enter a warm period again.
After Wei Zhonghua came up with such eight periodic changes in climate, he didn't think much more about it, but from the perspective of future generations, these eight periodic changes are actually closely related to the historical civilization of China.
For example, the first warm period was 2000-1000 BC, which was when the Xia and Shang Dynasties were prosperous. The population of the entire China increased greatly during these two dynasties, and the Shang Dynasty was also established during this period.
When the first cold period began, because this cold period only lasted about 100 years, there was no dynasty change. However, the Shang Dynasty suffered serious losses in national power. And as the second warm period came again, Xiqi was the first to start to recover. He succeeded in conquering the merchants and established the Zhou Dynasty.
This warm period lasted for more than 900 years. During this period, China entered the Spring and Autumn Period and the Warring States Period. The Spring and Autumn Period and the Warring States Period also became a period in Chinese history when various ideas and systems sprouted, and the population exploded.
And when the population explodes, there is still a large number of people who can be freed up to engage in various philosophical thinking, and there are also a lot of dead people in the wars between the princes. As a result of such nonsense, the population is still rising, which means that agriculture was very developed during this period. At least the agricultural output can meet the needs of the current population and there is still a large surplus. Only in this way can we survive the death With so much strong labor, it was possible to feed so many idle nobles.
According to historical records, it was during this period that the Chinese civilization began to expand rapidly. From the original Central Plains region, it continued to enfeoff various vassal states, and finally reached Qin in the west, Yue in the south, Qi in the east, and Qi in the north. The Yan State basically built the core territorial territory of China. These are the results of the expansion of the second warm period.
The second cold period after that was actually the period of the Eastern Han Dynasty, the Three Kingdoms and the Five Husties that disrupted China. During this period, the agricultural conditions in the entire north were getting worse and worse due to climate change, so the food production in the north was getting less and less, forcing many people to move south, because the south was warmer and could grow a lot of crops. food.
The most obvious evidence is that during the Three Kingdoms period, the Wu State was able to achieve a three-legged alliance with the south. This was something that was unimaginable before the Eastern Han Dynasty. After all, the south could never compete with the north in terms of population or food.
During the Five Husties Rebellion period, the south ushered in a period of real development. More and more people were forced to move south. The poor living conditions in the north also made fighting more and more popular, so in the end it was the powerful army of the north that Conquering the south, the Sui Dynasty finally unified the world.
With the unification of the Sui Dynasty, the third warm period gift package has arrived. It's a pity that the Sui Dynasty was not in good shape. This lasted only a few decades before giving up the gift package to the Tang Dynasty. The Tang Dynasty's rule included almost the entire Third Warm Period, building a The huge rule and territory of the Tang Dynasty.
Until the beginning of the third cold period, the land of the Tang Dynasty could not support more farmers, and food began to be seriously insufficient, so a new dynasty cycle began.
The third cold period lasted for a long time, and basically the entire Song Dynasty was in this period. However, the Song Dynasty was lucky that it lost the coldest region of Yanyun Sixteen Prefectures, and the northern region in its hands had the best climate. The Central Plains is relatively humid.
In this way, the Song Dynasty did not need to bear the unlucky population of Yanyun Sixteen Prefectures who would only consume more food, and the high development of the south could continuously transport more food to the north, thus helping the Song Dynasty maintain its rule.
This also resulted in Kaifeng Prefecture's port transportation being extremely prosperous. The millions of people in Kaifeng Prefecture all relied on water transportation from the south. This also made the defense of Kaifeng Mansion very difficult. There were a large number of waterways that could directly penetrate into the city, which indirectly led to the demise of the Northern Song Dynasty.
At the same time, this is also the reason why the Song Dynasty lost more than half of its territory. After changing from the Northern Song Dynasty to the Southern Song Dynasty, the economy became more prosperous than before, because the Song Dynasty left its burden to the Jin Kingdom.
The unlucky Liao and Jin countries had more baggage on their bodies, but they also lost the courage of their ancestors, so they could only continue to exploit the farmers in their own lands, which eventually led to their own demise.
(End of chapter)
