Chapter 1875 The evolution of Hangu, Waibo Technology
Hangu Pass is famous all over the world because during the Warring States Period, it became a choke point for the Six Eastern Kingdoms. It was the east gate of the Qin State and an important pass for the Qin State to resist the attacks of the Six Kingdoms of Shandong. During the Han Dynasty, as the world Basically unified, the status of Hangu Pass has actually begun to decline.
??Because the geography of Qin Hangu Pass changed later, Emperor Wu of the Han Dynasty rebuilt a new Hangu Pass at its current location, which was about three hundred miles eastward from the Hangu Pass of the Qin Dynasty.
Fei Qian stood on the flat platform of Choosangyuan, looking at the cracks formed by wind and rain erosion in Choosangyuan. This is a typical Loess Plateau area. Although the top is relatively flat, it is very high. These large and small cracks are almost steep, straight up and down, forming a natural barrier.
?This is not the first time Fei Qian has come to Hangu Pass, but every time he comes here and sees such scenery, he can''t help but feel some emotion in his heart.
The big river, also known as the Yellow River, flows from the north of Choosangyuan. This creates an extremely difficult environment for the Shandong people who attack from east to west, because there is no other way to go from Shandong to Guanzhong except through The cracks in this thick mulberry plain. Moreover, Qin Han Valley is even more dangerous than Han Valley in the Han Dynasty, but there is no unchanging road in the world, and naturally there is no majestic pass that will not change for thousands of years.
Fei Qian looked at Xu Chu who was standing behind him with Wei Du, and then focused his eyes on the river to the north. This guy Xu Chu publicly stated after the competition that he didn''t know how to command soldiers, so Fei Qian naturally placed Xu Chu among his own guards, which was somewhat interesting. Maybe Xu Chu really doesn’t understand the commander-in-chief, or maybe Xu Chu deliberately exposed his shortcomings after showing something...
?Hmm, maybe this is also a good idea.
One can''t be too strong. If you are too strong, you will have no friends.
Just like now Wei Du and Xu Chu have become familiar with each other. They are brothers. Wei Du also said that after arriving in Guanzhong Chang''an, he would treat Xu Chu to eat meat buns... Wei Du, who is straight, obviously thinks that meat buns are the best food. After all, if you go to a restaurant and eat a full meal, a big-bellied man like Wei Du will probably have to eat three or four months'' salary, plus Xu Chu, the empress of Wei Du In half a year, it’s almost impossible to get the northwest wind.
For Xu Chu, it is obvious that what he eats is not important. The important thing is to make friends, so naturally he has everything. He also said that if he received his salary, he would come back to invite the capital of Wei to drink...
The fence needs three stakes, and the pass also needs terrain help.
Qinhan Valley was abandoned due to terrain reasons, and now it is the turn of Hanhan Valley.
The river is rushing day and night. On the one hand, the Yellow River is eroding the Loess Plateau, and on the other hand, it is constantly cutting down. As a result, the water level of the Yellow River is lower than during the Spring and Autumn Period and the Warring States Period, and the river channel that was originally adjacent to the Choosang Plain is exposed. part of…
In addition, because the population in the Hongnong area of ??Guanzhong was larger than that of the Qin Dynasty, before new energy was developed, burning wood and charcoal became the only way to survive the cold in winter. In addition, housing construction The living needs of utensils and so on have caused the ancient forests on the Loess Plateau to be cut down in large quantities, which further damaged the water and soil. It also caused gaps in the vegetation in some places on the Choosang Plain, and it was no longer airtight. The forest allows the soldiers to take a detour.
Taishi Ci took Fei Qian to see the changes in the terrain here, in order to let Fei Qian know that Hanhangu Pass is now like an ancient wall. Although it still looks like a wall, there are still gaps for air leakage in all directions. Quite a few.
"Ziyi..." Fei Qian called Tai Shici lightly, and the sound was like the sound of water coming from the Yellow River. Although it was not loud, it was impossible to ignore.
by the subordinates. ” Tai Shici answered with cupped hands.
Fei Qian raised his hand, pointed at the Yellow River beach, and then pointed at his feet, "Here, just build a sentry and a beacon tower..."
Taishi Ci was stunned for a moment and said: "If this is the case...it can only serve as an early warning..." Taishi Ci''s original idea was to build a line of defense north of Choosangyuan. Even if he could not build a city wall, he could still rely on the terrain difference to protect the people below. The exposed river tidal flats gave a strong blow, causing effective damage. In the end, Fei Qian only said to build a beacon tower, which was naturally a bit far behind.
What''s more, if it was just a beacon tower, Taishi Ci could make the decision himself, so why ask Fei Qian to come here specially to check it?
Fei Qian smiled and said: "The pass in the world depends on the time and the place, and there is no place that can be invincible for a long time... Ziyi doesn''t have to worry about it. Just like the old beams in the house are cracked, the walls need to be repaired, the beams also need to be repaired, and they have to be tidied up." The tile eaves are not as good as the new ones..." Fei Qian naturally knew what Tai Shici meant, but it was just because Hanhangu Pass was indeed no longer suitable for use as an important defensive base due to changes in topography.
?Efforts to maintain and tinker with can only be extended for a period of time. After all, changes in weather, geomantic omen, and terrain cannot be changed by manpower in a short period of time. Even if it is afforestation, it will take at least ten or twenty years to see some results...
??Fei Qian looked at Tai Shi Ci and frowned slightly, and continued: "I have ordered Yang Dezu to lead Henan Yin... Here in Hangu... Ziyi can order a partial general to garrison, and then move the army to Shaanxi County..."
Shaanxi County? ” Tai Shici was stunned. So much retreat? Shaanxi County is located near Shaanjin, which is also an important ferry to Hedong and a very important node. However, it is a bit far from Hangu Pass and is separated by two large counties, one is Xin''an and the other is Mianchi.
"Shaan County, Shaanjin, Tongguan..." Fei Qian made a general gesture in the air, "Three places are integrated into one, we can solidify the pass and guard the east of the river. As for Hongnong..." Fei Qian chuckled, "And with the Yang family..."
It is not possible to completely abandon Hangu Pass. Although Fei Qian has such courage, Yang obviously does not, so he still needs to think about it and put it here. Just like Da Fei in Go, they are connected intermittently, depending on the opponent''s next move.
Mianchi and Xin''an were specially planned by Fei Qian for the Yang family. Of course, these were not considered favorable conditions, nor did Fei Qian have a good impression of the Yang family, but were preparations for the next plan. At the same time, if the weight of Hangu Pass is not revoked, on the one hand, due to the changes in Hangu''s terrain, Feiqian will have to continuously increase the number of soldiers invested here. This is an invisible burden, and this burden will be mostly increased. It’s up to Guanzhong, so it’s better to simply distribute some of this burden and let the Hongnong Yang family bear some of it.
On the other hand, after Taishi Ci moved to Shaanxi County, the distance to Guanzhong was much closer. In addition, Shaanxi and Tianjin can also easily reach Hedong. In every aspect, it reduced the transportation pressure on military supplies, making The efficiency of using grain and grass will be higher and better.
There is another hidden factor, that is, if the bait is not given, the Yang family will naturally be reluctant to use up the family''s wealth to resume construction. Mianchi and Xin''an are the chips given to the Yang family in advance, just like 996. If they are given enough, it will naturally be a blessing. But many people only remember to demand 996 from employees, but forget to give money, or they don’t want to give it at all...
One thing Guo Jia said very well before is that everyone has a basic base. Cao Cao''s basic plan is Yanzhou and Yuzhou, Fei Qian''s basic plan is to merge with Beiguanzhong, and Hongnong Yang family, of course, it goes without saying that it is Hongnong. If Luoyang Xin''an Mianchi is not given, the Yang family will willingly and selflessly contribute ?
In the current situation in the world, if the Yang family wants to turn around, it will undoubtedly be difficult to reach the sky. Firstly, there is not much land, and the land of Hongnong has been tossed two or three times by Dong Zhuo and Xiliang. Secondly, there is no general in hand, and it cannot be counted on. Yang Zhen and Yang Xiu went to the front line to kill people, right? But I hope this thing is very subtle, just like how many people drift up and down in the north. At the beginning, they felt that they could take root and sprout, that they could do it, and that some sunshine would make them shine... However, they forgot that the sun is actually very poisonous, and ultraviolet rays are very harmful. powerful.
In the Shandong area, Yuan Shao fell, Cao Cao became prosperous, and the surrounding area was stable. With the Hongnong Yang family as a buffer, Fei Qian was prepared to climb the technology tree for a while in the next period of time. This is what will happen next. The most important thing.
The technology tree of the Han Dynasty is really strange.
?Have you ever seen the crooked-necked tree in front of Liu Bei''s hometown? Generally speaking, the technology tree of the Han Dynasty looked like that. Obviously, the foundation was very thick and the trunk was very thick at first, but then it seemed as if it hit a wall of air halfway, turned a corner, and then grew in another direction.
There was a mirror in the Han Dynasty. The mystery of the bronze mirror was not solved until later modern times. The "bronze translucent mirror" is known as the magic mirror of the Western Han Dynasty. At first glance, this kind of bronze mirror is not much different from ordinary bronze mirrors, but the secret is that when this kind of bronze mirror is laid vertically and flat, at a certain At the angle of the light incident, although the light is shining on the front mirror, the patterns and patterns behind the mirror will miraculously be reflected on the wall or background opposite the mirror!
It is not difficult to do this with glass mirrors, but the problem is the material of copper...
In the subsequent dynasties, there were Shen Kuo and Zhou Mi in the Song Dynasty, Ma Jiuchou in the Jin Dynasty, Wu Qiuyan in the Yuan Dynasty, Fang Yizhi and He Mengchun in the Ming Dynasty, Zheng Fuguang in the Qing Dynasty, and a large number of scientists at home and abroad in modern times. All have conducted systematic and comprehensive research on this magic mirror.
It was not until the 1980s in modern times that the joint efforts of the Shanghai Museum and Shanghai Jiao Tong University and other institutions finally clarified the principle of this magical perspective effect. It is actually produced by the joint action of mechanics and optics. Special effects…
But this **** mirror was made in the Han Dynasty, using mechanics and optics that future generations would not understand until the 1980s. As a result, there are no subsequent branches. It just took a turn and I don’t know where it went.
There are also things like seismographs.
There are also cars.
??There are even hydraulic systems such as waterwheels and water cones that were supposed to shine and provide huge assistance in production and life. After just a rough study, they stopped briefly and there were no subsequent version updates...
Physics was so powerful in the Han Dynasty, but it ended up polishing mirrors, playing drums, and being put in a warehouse.
?Astronomy, to speculate on the rise and fall of the world, whether the emperor''s second child will work at night.
There was also chemistry in the Han Dynasty, and then it was used to make elixirs and sold as a five-color powder.
It’s really so crooked that it makes no sense.
?Of course, Feiqian cannot be fully rolled out immediately, but there are two directions that can be focused on, one of which is medicine. Fei Qian has been asking people to look for Hua Tuo, but he has never been able to reach him. He heard where Hua Tuo was, and Hua Tuo left when the people behind him went.
Hua Tuo, the hemp is boiling away.
In the Han Dynasty, Ma Feisan was sold like a fire sale. You don’t want 998 or 668. You only need 98 to take it home... No, you don’t even want 98. Hua Tuo gives it to everyone for free!
?As for Western medicine, for a long time, the methods used to perform surgeries and relieve patients'' pain were funny, ridiculous, cruel, and helpless. Either use heavy objects to compress the patient''s nerve trunk to make the patient''s limbs numb and lose consciousness, or directly perform "bloodletting therapy" on the patient to make him coma due to blood loss, and then perform so-called "painless" surgery on the patient.
??Even in order to achieve the paralysis effect, opium, marijuana, etc. were released, which will last for future generations and cause endless harm. Even so, there is still an example of an operation in which the patient, doctor and nurse all died, with a mortality rate of 300%...
Of course, it is also possible that Hua Tuo was deified and exaggerated by subsequent people, but if Hua Tuo did have some abilities and dared to develop surgical procedures, is it possible that in the current Han Dynasty, medicine could begin Just stop messing around and form a relatively complete medical system that is both internal and external, so that later Lu Xun classmates will not complain about the so-called "original cricket"?
?The improvement of medicine will greatly extend human lifespan and reduce the risk of dying from a cold. Fei Qian feels that it is an important subject that the Han Dynasty needs to focus on at the moment.
Another direction is mathematics.
Mathematics is known as the foundation of all sciences. "Zhou Bi Suan Jing" and "Nine Chapters of Arithmetic" can be regarded as the shining pearls of ancient arithmetic. They are gorgeous and gorgeous. There are four operations of fractions. Today there are arithmetic, square root, cube root, and surplus and deficiency. , various area and volume formulas, solutions to linear equations, addition and subtraction rules for positive and negative numbers, Pythagorean solutions and other calculation methods, forming an independent system centered on calculations that is completely different from ancient Greek mathematics.
Then, mathematics grew crooked again and became a tool to bully the people, calculate money and food, and embezzle for personal gain. It became the end of the "Six Arts". Even in the era of imperial examinations, the most talented people in the math department were decentralized to work as money and food calculations. petty official…
?The surging Yellow River water in the distance below my feet continues to flow. Fei Qian now has people on hand and has the conditions to carry out these things, and Fei Qian feels that these things are far more interesting than killing people.
Ziyi, a certain person will go ahead. You can arrange the military affairs and then return to Guanzhong! ” Fei Qian patted Tai Shici on the shoulder and said, “We have been fighting for several years, but now we are taking a break. It is also the time to reward according to merit! 』
(End of this chapter)