The siege lasted for a long time, and many people in the army were sick. In addition, there are many soldiers who were burned by the previous fire, and after a thousand years, they are all severe burns that are difficult to treat, and at this time there is no cure, and they have died of illness one after another. Now those who can still breathe in the hospital bed are some lightly injured.

However, in the general wounded camp, whether the lightly wounded can heal depends on luck. Fortunately, the medical staff in the sanatorium are all good hands brought by Yanda from Qinzhou, and they are also doing a very good job, the wards are clean and refreshing, and the patients have been properly treated.

These people basically knew Han Gang, and when they saw Han Gang coming in, they came up and kowtowed with surprise and joy. The leader is still Han Gang's acquaintance, Li Deming, a disciple of the old military doctor Qiu Yiwen.

Li Deming saluted Han Gang, got up and said: "I heard that Ji Yi has arrived in the Xuanfu Division, and I have been looking forward to Ji Yi coming, and now I have finally looked forward to it." ”

"How is Qiu Lao doing?"

"The family teacher is in good health, and he often goes out to various military villages recently."

"Qiu is not too young to be old, it's time to rest and enjoy the blessings." Han Gang shook his head, "You, who are apprentices, should also be persuaded." ”

Li Deming said with a smile: "The family teachers all say that they are working hard, and they will get sick when they are idle." ”

Han Gang smiled and shook his head, there are indeed such people. I asked about the Fan Army again, basically he forced Wang Wenliang to fight, and now Wang Wenliang died in battle, and the Fan Army subordinate to him has also suffered heavy losses. There were many wounded, and it was inconvenient for Han Gang to go by himself, so he asked Li Deming to send a few capable men to the wounded and sick battalion of the Fan army to take care of them.

Han Gang took a turn in the ward, his reputation was loud, and when he heard that Han Yukun was coming, the spirits of the wounded soldiers suddenly improved a lot. Li Deming said with a smile that if Han Gang came to visit every day without needles and medicines, he would be able to heal his injuries.

Han Gang scolded with a smile, and just sat down to rest. The sound of an axe and wire saw drilled into his ears one by one. "Why is it so noisy?"

"Behind is the artisan battalion, which is now building siege equipment every day, and it has been noisy during the day, and it can only rest at night."

"Sanatoriums have always been a clean place, how can they arrange to be neighbors with the artisan camp, and how can people recuperate?" Han Gang listened to the squeaking sound of sawing wood, and he felt panicked, just like hearing the sound of fingernails scratching the blackboard in the old days, he was hairy all over, and he couldn't sit still. said to Li Deming: "You take care of it here, and I'll go over and take a look." ”

Han Gang got up and went to the artisan camp behind to see if he could make them quieter, but he didn't expect to see You Shixiong.

"Uncle Jing, why are you here?"

"This is the foolish brother in charge...... But Yukun, why are you here? ”

"The sanatorium is in front of you, so when you hear the sound, come and take a look."

Han Gang didn't say it explicitly, but You Shixiong smiled knowingly and said apologetically: "I've disturbed Yukun." ”

How could Han Gang deal with You Shixiong, and after saying nothing, he visited the craftsman camp accompanied by You Shixiong.

After nearly a month of rushing work, the siege equipment has been built. The nest car that climbed high and looked far away, the ladder car used to climb the city, the moat bridge that crossed the Hao River, and the head car used to dig tunnels, one by one were parked in the workshop, and You Shixiong took the trouble to introduce them to Han Gang one by one, and the footsteps of the last two stopped in front of a stone-throwing artillery truck.

Han Gang can also be regarded as a long-term battle, and recently he has been in Luo Wucheng, which is under heavy siege, for a long time, and he has seen a lot of weapons to defend the city. However, since he has never participated in siege warfare, he has only seen a few kinds of siege equipment.

The catapult Han Gang in this era is still the first time to see it, and the siege equipment he sees now is called the artillery car, which is not the kind of catapult he remembered in his previous life. Especially in the front part of the casting rod, dozens of ropes hang down one by one, instead of being tied with stones or heavy objects.

"Why are you dragging so many ropes down?" Han Gang asked You Shixiong curiously.

You Shixiong raised his hand and pulled the rope, and pulled it hard, and the other end of the throwing rod worn on the beam was pulled up. He smiled at Han Gang and said, "These ropes need to be pulled by thirty people at the same time to throw the stones out of the canopy, and the strength is not good at all." ”

Han Gang listened and wondered: "How can you use manpower?!" ”

"What else can you use without people, you can't use cows and horses!?" You Shixiong laughed twice, "Niu and Ma are not so obedient. ”

"That's not what the little brother meant." Han Gang shook his head, "The purpose of using people to pull the rope to the bottom of the rope is to make the throwing rod so that the stones can be thrown. That is to say, as long as there is a force to the rod, so that the back end of the throwing rod is lifted, whether it is pulled by a person, the essence is the same. ”

You Shixiong heard a little meaning: "Yukun, what do you think?" ……”

"The little brother is thinking, what if you don't use manpower to pull it, but tie a boulder or other heavy object?!" Han Gang took the branch and drew the shape of the catapult in his memory on the ground with a layer of floating soil.

While listening to Han Gang's explanation, You Shixiong frowned and looked at the sketch for a long time, and raised his head suddenly, "He Zhong, find him!" ”

In the blink of an eye, an old craftsman who was called He Zhong was found.

"He Zhong is the head of the craftsman camp, and he is in charge of everything here." You Shixiong introduced it to Han Gang, and asked Han Gang to explain it to He Zhong in detail.

The old craftsman listened for a while, asked a few more words, then began to nod, turned around and said to You Shixiong: "It can probably be done." ”

With the expert's approval, You Shixiong began to marvel at Han Gang's erudition: "I didn't expect you to know so much about this armament, Yukun. ”

"No!" Han Gang immediately shook his head, "Junior brother doesn't understand at all, otherwise how could he not even know what the rope of the artillery cart is for?" ”

You Shixiong was puzzled: "Then why can you ...... Yukun?"

"It's just dialysis." Han Gang immediately said. With a smile, he said again: "I don't know if Uncle Jing has ever seen a rod scale...... Why is it possible to weigh something with a wooden pole with a rope and a weighing stone? And a crowbar, why can one person pry up a thousand pounds of boulder? ”

You Shixiong was even more puzzled: "What does this have to do with the artillery truck?" ”

"Because it's the same."

Han Gang casually took a wooden pole and explained the most basic lever principles and formulas in mechanics to You Shixiong. The physics of later generations is closely related to reality, and a simple experiment can verify it.

is simply a capable minister, Han Gang is not reconciled. Academically, he also has unique ideas. He has always intended to combine the scientific theories of later generations with Confucianism, the most intuitive and easy to verify are the principles of mechanics.

Han Gang had already used a crowbar and the rod scale that he had just been asked to find, You Shixiong nodded again and again, and wrote out the formula of the force arm and force on the paper, and then concluded: "Whether it is a catapult, a rod scale, or the simplest pry bar, the shape and use are all the same, but the principle is unique...... It is the principle of balance between force and force arm. ”

You Shixiong thought about it for a long time, and finally had a comprehension, and Zhengse thanked Han Gang: "Thank you Yukun for your understanding, now the foolish brother knows that the cannon truck and the pole scale are used in the same way......" After thinking about it, he asked suspiciously, "I don't know why Yukun can think of this?" ”

Han Gang said with a smile: "Don't you hear that there are four in front of self-cultivation, Qi family, governing the country, and leveling the world." ”

Of course, the important outline in the "Book of Rites and Universities" will not be unaware of the knowledge of the Jinshi in the You Shixiong examination, and he opened his mouth and said: "'Those who want to be clear and virtuous in the world will rule the country first. Those who want to rule their country must first gather their families, and those who want to gather their families must first cultivate their bodies. Those who want to cultivate their bodies must first correct their hearts. Those who want to correct their hearts must first be sincere. If you want to be sincere, you should know it first. Enlightenment is in Gewu. 'Yukun, are you talking about the eight words 'Gewu, Zhizhi, sincerity, and righteousness'? ”

"What the little brother wants to say is to learn from things."

"Is this 'Gewu'?" You Shixiong pointed to the formula on the paper, which was completely different from the annotation he had memorized.

"Exactly!" Han Gang nodded: "It's just Mr.'s 'Gewu', not Zheng and Kong's 'Gewu'." ”

Han Gang's understanding of these four words is mainly based on the interpretation that Cheng Hao once explained to him. Cheng Hao's understanding of the knowledge of things is completely different from the common saying in the world before. The key is how to interpret the word 'Ge' - there is no annotation in the "University", and it can only be interpreted by later generations of Confucians.

The commentaries of the Confucian classics that are now in use in the world are from the commentary of the great Confucian Zheng Xuan of the Eastern Han Dynasty, and the other is the interpretation of the great Confucian Kong Yingda of the Tang Dynasty. They all say that 'Ge' means 'come', that is, if you know the depths of goodness, you will come to good things, and if you know the depths of evil, you will come to evil things, and they will teach people to do good deeds, so that good things will come.

However, what Han Gang learned from Cheng Hao is close to the saying of later generations, the so-called Gewu is to study the principle of things. Zhang Zai doesn't say much about Gewu, but his doctrine is not much different from Cheng Hao in this regard.

Zhang Zai's Guan Xue Chongmeng, and Ercheng's Luo Xue also Chongmeng, both belong to the source of the Simeng school, and they believe that they have inherited the Taoism of Mencius. For the "University" from Zeng Shen, it is natural to study it deeply, not like the Han and Tang dynasties, just in general.

You Shixiong patted his head: "I see." The foolish brother has been away from the gentleman's door for a long time, and the teacher's teachings have not been listened to for a long time, but he has been desolate to this point. Or Yukun, you are fortunate to be able to follow Mr. for two years and listen to the origin of the Great Dao. ”

"Everything has its own reason, hence the name 'Tao'. Mr. Gong's contribution to the creation and direct passage of the avenue, Han Gang is even difficult to look at. I had to take a different path, so I had the idea of 'using numbers to make sense'. Han Gang smiled conceitedly, "Taoism has a saying of three thousand avenues, looking at my holy religion, although the truth is one, but the side art can also be close to the avenue!" ”

"It's a good side art and it's close to the avenue!" Suddenly, there was a sound of applause behind him.

Han Gang and You Shixiong immediately turned around, and it was Han Jiang who stood at the door with Chong Ge and Yan Da.

I haven't seen him for a long time, I don't know what happened, Han Xianggong, who had been in the Tang Dynasty for a long time, sharpened his eyes again, and came to the front line to inspect. He walked in, looked at a simple and clear equation written by Han Gang on the paper, and the structural sketch of the new catapult, and shook his head in praise for a long time.

"I can't imagine that Yukun is not only a talent for doing things, but also a self-made machine in terms of knowledge." Han Jiang is not a Confucian who is intensive in academics, and he is just a bystander to the current school dispute. However, just now he listened to Han Gang outside in a simple way, and used the most concise calculation to explain the principle of the catapult thoroughly, which made him have to be amazed, "It is indeed a grievance to let Yukun manage the injury and illness." ”

Han Gang humbled continuously: "Han Gang is ashamed!" ”

He is standing on the shoulders of those who came before him, not his own work. The theorems and formulas learned in the previous life seem simple, but in fact they come from the accumulation of thousands of people and thousands of years, and then they are studied by one person. Although Han Gang wanted to take it as his own credit, he was not self-righteous and accepted Han Jiang's praise in full.

"Just do what you said, Yukun." Han Jiang is more concerned about the catapult, "This catapult will try to make two first, if it is used together, it should be played to the Son of Heaven." ”