Three Kingdoms

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. In 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 Fei Qian's first visit 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 the thick mulberry plains. 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 Zhu, who was standing behind him with Wei Du, and then focused his eyes on the river to the north. This guy Xu Zhu publicly stated after the competition that he didn't know how to command soldiers, so Fei Qian naturally placed Xu Zhu among his own guards, which was somewhat interesting. Maybe Xu Zhu really doesn't understand commanders, or maybe Xu Zhu deliberately exposed his shortcomings after showing something...

Well, maybe this is also a good idea.

You can't be too strong. If you are too strong, you will have no friends.

Just like now Wei Du and Xu Zhu have become familiar with each other, and they are brothers. Wei Du also said that after arriving in Chang'an, Guanzhong, he would treat Xu Zhu to eat meat buns... Wei Du, who is straight, obviously thinks that meat buns are the best. 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 many other things. , the capital of Wei will probably suffer from the northwest wind in the second half of the year.

For Xu Zhu, it is obvious that what he eats is not important. What is important is making friends, so of course everything is necessary. He also said that if he received his salary, he would invite the capital of Wei to drink again...

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.

"My subordinates are here. ” 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 be an early warning..." Taishi Ci's original idea was to build a defense line north of Chou Sang Yuan. Even if he couldn't build a city wall, he could still rely on the terrain difference to provide protection. The exposed river tidal flat below 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 would he ask Fei Qian to come here specifically to check it out?

Fei Qian smiled and said: "The pass in the world depends on the time and 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, and the walls need to be repaired, the beams also need to be repaired. It can't be said that there will be more." Tidying up the tile eaves is not as good as building a new one..." Fei Qian naturally knew what Taishi Ci 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.

Trying to maintain it and tinkering can just barely extend it for a while. After all, changes in weather, geomantic omen, and terrain cannot be changed by manpower in a short 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.

"Shaanxian, Shaanjin, Tongguan..." Fei Qian made a general gesture in the air, "Three places are integrated into one, we can consolidate the pass and guard the east of the river. As for Hongnong..." Fei Qian chuckled, "And with the Yang family... 』

It is impossible 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, and it was not because Fei Qian had any good impression of the Yang family, but as preparation 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 the terrain of Hangu, 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 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 do not want to give it at all...

What Guo Jia said before is very good, that is, 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 many people drifting 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, we forget that the sun is actually very vicious and its ultraviolet rays are very strong.

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 weird.

Have you ever seen the crooked-neck 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, and 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 effect……

But this damn mirror was made in the Han Dynasty, using mechanics and optics that future generations would not understand until the 1980s. As a result, there were no subsequent branches. It just took a turn and I don’t know where it went.

There's also something like a seismometer.

There are also cars.

There are even hydraulic systems such as waterwheels, water cones, etc. that were supposed to shine and provide huge assistance in production and life. After a rough study of it, 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.

Chemistry also existed in the Han Dynasty, and then it was used to make elixirs and sell 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 it can focus on, one of which is medicine. Fei Qian has been asking people to find 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 simply sold off the building. You don’t want 998, or 668, you can take it home as long as 98... 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 operations and relieve patients' pain were both 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 classmates of Lu Xun will not complain about the so-called "original cricket"?

The improvement of medicine will greatly extend human lifespan, and will also 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 officials...

The surging Yellow River water in the distance below your 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, I will take one step ahead. You will 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! 』