Emperor Renzong of the Great Song Dynasty

The concierge nodded: "Yes, it's my lord's old acquaintance."

The man was quite tall and quite young, as for what his eyebrows and eyes looked like, he really didn't pay much attention to them.

Standing in front of him, that person seemed to have an unstoppable demeanor that made people dare not look at him carefully.

However, according to what Mr. Gongsun said, he is both a dragon and a phoenix, which seems to be in harmony with that person's demeanor.

And that person's surname is Zhao...

Their lord is now a high-ranking official, so this should be the son and phoenix grandson he met!

I don't know if it's the prince or the county king. Seeing that he is so young, he may still be a prince...

Gongsun Ce squeezed his forehead.

There is no need to doubt, the emperor is here.

Although Bao Zheng has a high official position, he is following the path of clean streams that are not stained by mud. If you can't make friends with relatives of the emperor, you won't make friends.

What's more, it's not Xiu Mu today, everyone knows that Bao Zheng is not at home.The purpose of visiting at this time must not be Bao Zheng.

I don't know that the emperor wants to cheat again... no, what he wants to do again.

Gongsun Ce maintained a decent smile: "So it's Mr. Zhao, what a distinguished guest."

He got up and said to Bai Jintang and Xu Qing: "There is another guest here, excuse me for a moment."

The two got up hurriedly: "The guest is up to the owner, we will not disturb."

After the two returned to the guest room, Gongsun Ce heaved a sigh of relief and went to greet the emperor himself at the door.

When we got to the door, we saw the emperor standing there, playing with a piece of tender green willow. He peeled off the leaves, twisted them a few times, and pulled out the core to make a small willow flute.

Gongsun Ce looked up at the big willow tree in front of their house, it was still full of shade, with green sash hanging down, swaying in the wind.

Alas, the name of Yushi Mansion can block pedestrians but not the emperor, and he will suffer this setback after all.Fortunately, the emperor should have come only this time, and it was still too late to break the tree bare.

Zhao Yiyi brought the willow flute to his lips and blew a few out of tune sounds. Seeing that Gongsun Ce had come out, he handed the willow flute to Liu En, took a handkerchief and wiped the bright green sap on his hands , smiled and walked over: "I haven't played for many years, I'm unfamiliar."

Gongsun Ce laughed and said, "It's not easy. When I was playing with the neighborhood kids, I couldn't even make a sound."

He was born in a poor family. When he was a child, his family had no extra money to buy toys for the children. The children would get together and play with whatever they had.Folding willow sticks and playing willow flute is the most popular kind. Children with ingenuity and ingenuity who can play melodious music with willow flute are like gods descending to earth in their eyes.

But the willow flute is not as good as a serious musical instrument, it is just a piece of bark, and it will break after a few blows.The so-called music is just children's play.The truly elegant music rituals are unconditionally accessible to these humble children.For example, Principal Yan never asked him to help when compiling music theory, because he knew he didn't know anything about it.

Thinking of this, he suddenly became suspicious.

The emperor was born in the prince's mansion and entered the palace at the age of seven. He had never had contact with peasant children at all, so where did he learn to play the willow flute?

Zhao Yiyi walked to him and entered the mansion together with him: "I heard that the wall of your house was blown down last night?"

Gongsun Ce immediately put Liu Di behind him, and said with a wry smile, "This...was also an accident."

After Bai Jintang knew that he was the accountant who managed the accounts in the mansion, he sincerely expressed his willingness to bear all subsequent compensation issues.

Gongsun Ce saw that he looked like a man of great fortune, and thought of the great achievements of his younger brother Bai Yutang - this man fought with Zhan Zhao the first time he came to the house, and stepped on the tiles on their roof.As a result, old and new grudges welled up in his heart, and he brutally killed Bai Jintang.

Bai Jintang felt guilty, so he agreed.

Zhao Yiyi said: "Last night, Bao Qing went into the palace overnight and showed me the fierce fire and thunder. It's amazing."

Seeing that he only used two simple words to evaluate Menghuolei, Gongsun Ce understood.

The fewer words, the bigger the thing.

He whispered: "That Han Zhuangshi is at Boss Jiang's place..."

He thought that the emperor was looking for Han Zhang when he left the palace this time.

Zhao Yiyi shook his head: "I saw him last night. I'm here to find you."

Gongsun Ce was dumb: "Me?"

Zhao Yiyi glanced at him: "Yes, it's you."

Mr. Gongsun Ce, a mediocre math genius, are you interested in joining our team to calculate the trajectory of the shell?

After sitting down in the pavilion, Zhao Yiyi pointed to the teacup that had not been taken away and asked, "Is there someone here just now?"

There are three cups on the table in the pavilion, one for the host and two for the guests, only two of which show signs of being drunk, the other is so full that it seems that it has never been picked up.

It seems that one of the two guests doesn't like tea...

Gongsun Ce raised his forehead: "I forgot to tell them to clean up."

There are not many servants in their house, and there are always times when there are not enough servants.

Call the servant to take down the teacup and make a pot of tea again.Zhao Yiyi sat at the head, and Gongsun Ce was at the bottom to accompany him.

Gongsun Ce felt uneasy, not knowing what the emperor meant by "I'm here to look for you".

I didn't expect, oh, I didn't expect that the emperor actually came to trick himself.

Zhao Yiyi took a sip from his teacup and asked Gongsun Ce: "You have seen the power of the fierce fire and thunder."

Gongsun Ce nodded: "It lives up to its name."

Zhao Yiyi turned the cup in his hand: "I plan to modify it a little and use it in the military camp."

Gongsun Ce cheered and said: "The officials are sages, if this thing is used to arm the new army, it will really add wings to a tiger, and it will definitely create an ever-victorious army for our Song Dynasty."

He still didn't want to understand what the emperor came to him for.Questions about the barracks should go to Di Qing. By the way, if you want to arm the new army with fierce fire and thunder, you must transform it. It cannot be in its current form.

On the battlefield where the two armies are facing each other, it is impossible for soldiers to throw a thunderbolt at the opposite side.

Even today's thunderbolts, which are as big as chicken eggs and can blow down a wall, are not powerful enough on the battlefield.If you want to use it to attack the city and attack the enemy, it must be at least ten times larger than the current one.

Such a big fiery thunder, it must be impossible to throw it with manpower.Then use machinery.If it is related to machinery, you should go to Xia Yuqi...

Gongsun Ce seems to have realized something.

Sure enough, the emperor asked him: "Mr. Gongsun seems to have worked well with Senior Xia before."

When Xia Yuqi was building iron boats, he worked with Gongsun Ce for a while.The two of them, a mechanic and a mathematician, help each other, and cooperate with each other quite tacitly.

Gongsun Ce said: "Thank you for the support of senior Xia."

Zhao Yiyi smiled and said, "Are you interested in collaborating again?"

The so-called throwing the fierce thunder in the trebuchet is just the most superficial idea. If this idea is to be realized, there is still a long way to go.

The most important of these is the question of "where will the thrown shells fall?"

Cannonballs are no better than stones.In the past, trebuchets didn't have to bother to calculate where the stone would fall. Anyway, it was enough to fall within the range of the enemy's army, and it didn't matter how far or how close it fell.But the cannonball will explode. If the location of the shell is not as expected, the power will be greatly reduced. If it falls close to one's own side, the aftermath of the explosion will hurt people.

Therefore, the "cannonball trajectory", that is, the parabolic problem, must be solved.

He looked at the only talented person under him who had a talent for mathematics.

It's up to you!Mr. Gongsun!

Gongsun Ce said cautiously: "The student is just a low-ranking scholar, and he would dare not refuse to follow any assignment."

Zhao Yiyi nodded: "That's very good. Mr. has reached the pinnacle of mathematics. If you can get Mr.'s help, you will get twice the result with half the effort."

He didn't say it to put a high hat on Gongsun Ce, but it was the fact.Although Yan Shu didn't pay much attention to arithmetic, he also recognized Gongsun Ce's talent in arithmetic. Zhao Yiyi also heard from Yan Shu that Gongsun Ce was a fierce man who drew star trails freehand, and he didn't even need to type a draft.

Such a terrifying mathematical talent, it is a pity not to calculate the parabola.

Parabola can not only be applied to the trajectory of shells, but also the basic knowledge of geometry, optics, and functions.

Maybe he can lay the foundation of modern science while building artillery...

Gongsun Ce hesitated and said, "It's just that the students are assisting Mr. Bao right now. If they leave rashly, what will Mr. Bao do?"

He is Bao Zheng's accountant and think tank, without him, Bao Zheng is like a broken arm.

Zhao Yiyi rubbed his fingers, feeling very troubled.

This is a problem, and it is still a problem that is not easy to solve.He also counted on Bao Zheng to fight against corruption, but in the end he robbed him of his left and right hands. Firstly, he was not honest, and secondly, he was afraid of affecting his performance.

But he was really worried if he didn't send a mathematician to build artillery with Xia Yuqi.

Although Xia Yuqi is proficient in mechanics, he is not a mathematician after all. He has the ability to calculate the size of a part, but he absolutely does not have the ability to summarize laws, extract axioms, and check formulas from phenomena.

In the end, he said: "After the Dragon Boat Festival, sir, let's go to Senior Xia. You have to go there, Master Bao..."

He murmured: "We can definitely find a suitable person to replace him."

Gongsun Ce bowed his head and said, "Obey."

Zhao Yiyi put down his teacup: "I heard that the elder brother of our young hero Bai has come to Beijing?"

Gongsun Ce said: "Yes, I'm visiting the mansion now."

Zhao Yiyi smiled and said, "Boss Bai has done a lot of things in Yangzhou, so I want to meet him too. It just so happens that he is at the residence, why don't you come out and get to know him?"

Gongsun Ce got up and said: "It's not difficult, the students invite him here."

Zhao Yiyi just wanted to ask a servant to go, but when he looked around, he didn't see a servant.

I don't know if Bao Zheng's mansion didn't have so many servants at all, or they were dismissed, and they were not allowed to spy on Shengyan.

Gongsun Ce walked on the way to the guest room with mixed feelings in his heart, some regret, some reluctance, some excitement, some anticipation...

He walked to the guest room door and knocked on the door: "Brother Bai, Mr. Zhao wants to see you."