Chapter 221 Multidisciplinary Analysis
Because Yan Xiao was leaving today, He Shiqing was not in high interest. Yan Xiao was also trying hard to make jokes and make He Shiqing happy.
Zhou Zhi said: "Salt Rat and Mangzi are the people of the country. They can't take a few days off each time. Fortunately, I will go to Shudu in a few days, and I will go with Shu Yi when the time comes. Look at you."
"Huh?" Jiang Shuyi was nervous: "No, I went to see grandma with my father, not with Zhou Zhi..."
"Again A shameless person!" Feng Xueshan expressed her disdain again.
"That's true." Zhou Zhi didn't take it seriously: "Shuyi, think about it, when you arrive in the capital of Shu, why don't you go and visit Vice Principal Li? Don't you go and visit Sister Xue Li? The old station director? For those who have selflessly helped these people? We must do our part no matter what to those who cross us Is it polite?"
"There are also study materials, so we have to find Zhang Weiran and Xu Hui. Why don't we go together?"
"Yes...I'm sorry, Zhou Zhi, I didn't think carefully." Jiang Shuyi quickly apologized.
“Oh my God, are you apologizing now?” Feng Xueshan hugged Jiang Shuyi to her side: “Shu Yi, you are so deceitful, you are obviously just trying to find an opportunity to get close to you. , and he acted like he was reasonable.”
“But...it makes sense, so you have to listen...”
"Shu Yi's attitude is the right one." Zhou Zhi nodded in agreement: "Don't ask about the source of the truth, just ask whether it is right."
"Even if it is the enemy's opinion, as long as it is right, then we must listen. For example, the Qin State built the Zheng Guo Canal. "How long did it take to build the Zheng Guo Canal?" Zhang Lu asked questions without delay.
"The record in "Historical Records: River Canal Book" is that "more than 40,000 hectares of land for irrigation, marsh and brine", almost 1.1 million acres, and "every acre is harvested for one minute", that is, almost an acre. With a yield of two hundred catties, Guanzhong became fertile and fertile, and there were no bad years. From that time on, the floods in Guanzhong were basically controlled, and it gained the reputation of being the first 'Land of Abundance'." Zhou Zhi also did not delay eating and explaining.
"The population of Qin at that time, according to Mr. Fan Wenlan's inference, was between two million and three million. The Zhengguo Canal project took about ten years, and it increased Qin's per capita grain possessions by one One hundred pounds.”
"Note that this is extra food out of thin air. According to the amount of food carried by an average person in ancient wars, which can last for half a month during a regular march, these extra food can support a three-measure battle if they can be transported to the front line. One hundred thousand troops, a one-month war. "
"Of course it won't be so good in reality, but we must also note that so much food is only an increase in one year."
" Place There is no doubt that Zheng Guoqu’s increase in Qin’s national power was exponential.”
“Do you have any evidence for these data?”
“Yes,” It is recorded in "Wu Jing Zong Yao" : 'In the old method, a person can carry three measures of dry food, which can last for several days. If the army is on the road, and the place is far away, and the stores are exhausted, it is necessary to select thin cattle and horses to serve as food for the army. "Trapped"
"Do you think this is liberal arts or science?" He Shiqing also became interested: "What you are doing is almost the same as doing math word problems." "It should be analyzed across disciplines and in multiple ways." Zhou Zhi said: "This is what we are comparing now. The advantage that the ancients had was to study both arts and sciences and use all available methods to study problems. ”
“ For example, there is a famous historical event "The Iron Lock Crossing the River", because there is a sentence in Liu Yuxi's poem "Wang Jun's boat went down to Yizhou, and the King of Jinling lost his spirit. Qianxun Iron Lock sank to the bottom of the river, and a flag fell out of the stone." , thinking that the incident happened in Jinling, and that Sun Hao used iron chains to cross the Yangtze River in the upper reaches of Jinling to prevent the warships of the Western Jin Dynasty from advancing eastward. This is actually wrong. ”
"If you look up the information, you will find that Wang Jun, the governor of Yizhou in the Western Jin Dynasty, was ordered to build a warship in order to conquer Soochow. The wood chips produced during the shipbuilding flowed to Jianping County along with the Yangtze River. After Wu Yan, the prefect of Jianping discovered it, he picked up the wood chips. Sun Hao reported on the wood chips that he believed that the Western Jin Dynasty was building warships and planned to attack Wu. He asked Sun Hao to send more defenders to Jianping to defend, saying that as long as Jianping did not fall, the Western Jin Dynasty would not be able to cross the border. Jiang attacked. But Sun Hao refused to listen. Wu Yan had no choice but to make iron chains and lower them across the Yangtze River at strategic points. He also made large iron cones and placed them secretly in the river, trying to prevent the Western Jin warships from advancing eastward. "
"Where is Jianping? It is now Zigui, a dangerous place in the Three Gorges, thousands of miles away from Jianye in Soochow."
"So the iron chain across the river is actually across the Three Gorges?" Zhang Lu asked.
"That's impossible." Wei Fei reacted quickly: "You can tell by looking at our Jiachuan River. The water level of the Yangtze River varies by more than fifteen meters between dry and busy seasons. How can we stop it with an iron chain? Also, even if Where is it across the river? How long is it? How much iron is needed? How powerful can these iron materials be used to make weapons and arrows? Which method is more cost-effective? "
Zhou Zhi gave Wei Fei a thumbs up: "That's the idea, even the scientific idea. In Jianping County, it is assumed that the iron chain across the Yangtze River blocks Buildings and ships were not something that the state of Wu could achieve at that time."
"However, there are indeed records in history. In the fourth year of Tianji (the first year of Taikang in the Jin Dynasty), Wang Jun led his army to attack Wu and marched along the Yangtze River. Most of the city guards surrendered or were quickly defeated, but However, Wu Yan led the army to defend Jianping and was unable to capture it. Finally, Wang Jun used a large raft to remove the iron cone under the water, and burned the iron chain with fire, and then went down to Xiling."
"Xiling is Yichang. , Wang Jun finally broke out of the Three Gorges."
"Then this also shows that the 'Iron Lock across the River' is indeed a thing. How should we understand this?" Zhang Lu asked.
“In fact, it can be explained from the perspective of modern military science.” Zhou Zhi said: “It can be explained by understanding the iron lock across the river and the hidden iron cone as a measure to defend Jianping. "
"Zigui is located in a dangerous location. At that time, Jianping was located between the Yangtze River, Xiangxi River and Mancao River. If Jianping was properly guarded, it would be a nail in the middle of the Three Gorges and could not be taken. Once there, Wang Jun would never dare to go eastward. "
"We Jiachuan people should easily understand this. During the Southern Song Dynasty, our Shenji City in Jiachuan and Diaoyu City in Hechuan downstream were two different cities. The Mongolian army was unable to move eastward along the Yangtze River for decades, and had to divert its route to Xiangyang for this reason. "
"Yes, otherwise the retreat would be unsafe and the entire army would be wiped out. "Zhang Lu nodded.
"Therefore, iron chains and iron signs are mostly measures to defend Jianping City. They can only be installed in the Xiangxi River or Mancao River around the city. They are powerful measures to prevent Wang Jun from using waterways to attack the back roads of Jianping City. The cost Compared with crossing the Yangtze River, it is much lower and can be accomplished by a county governor."
"It would be great if I could go and see it sometime." Zhang Lu is a fan of the Three Kingdoms. After some careful consideration. Analysis, and Wei Fei’s supplement Only after filling in the matter did I realize how wrong the "truth" I once thought was, "Based on emotion and reason, this inference of yours is much more reasonable than the idea of 'iron chains across the river'."
"You men can't stop talking about fighting." Feng Xueshan concluded: "Have you eaten enough? Let's go after eating!"
(End of this chapter)