Li Tai has been very comfortable recently, he really wants to wait for Liu Xu to come back, to see the results he found, there is a profound truth in this, infinite knowledge, the power of a card, enough to push a city wall, this is his ideal state.

On the wide square of the Changkong Academy, a huge earthen wall is erected, and then the unfixed planks below are arranged in order, and when they are not moving, these planks are stable, but as long as you use one finger to gently push the small plank at the back, the gradually increasing force will completely cause qualitative change and overwhelm the earthen wall.

Li Er and the eldest grandson, as well as the ministers, students, and ordinary people, these people all sat around the stands of the square, and the guards drove the students out of the range of the earth wall. Only in this way can he show his mastery of arithmetic. This is the application of the law of groin and simple mechanics.

"Father, mother, and gentlemen, classmates, the experiment I did today is to prove that a small mistake can lead to huge problems, and the study is rigorous, otherwise, it will affect the whole body, and at the same time, this truth can also be used in many aspects, which is thought-provoking."

Li Tai held his head high, very magnificent, but when Xiaoya couldn't help but want to pinch the smallest plank, Li Tai's face turned pale, and he quickly withdrew, Xiaoya muttered a stingy sigh, and shrank back, isn't it just to push the bigger dominoes, the family has been playing for a long time, and it is just more than anyone pushing.

The experiment was indeed spectacular, from the palm-sized plank, to the heavy plank of a floor, to the last earthen wall, Li Tai gently pushed, and then the wooden sign fell slowly, and then faster and faster, people's eyes stood up with the rapid collapse of the plank, the students of the academy cheered loudly, with a loud bang, the wooden plank overwhelmed the earthen wall, and fell precisely within the area demarcated by Li Tai. Except for the dirt that flies out, the rest, almost perfectly.

Marvel! Praise!

This is almost all the thoughts of the people in the audience except for the people of the Liu Mansion, if it is according to this idea, as long as the plank is big enough, it will be no problem to overwhelm the entire city. And, with just a gentle push, what is it? Miracles!

The whole process was silent for a long time, and then there was warm applause, the eldest grandson did not hide his son's praise at all, and Li Er also laughed happily.

"It's a good one to move the whole body, Guanyin, the green finch has grown up."

As his disciples, these students of the academy are naturally unwilling to be lonely, and want to be outstanding, Wang Xuance, Ma Zhou, Li Yifu, Shangguanyi, Lu Chengqing, Liu Renliang, these people, none of them is simple, there are also factions in the academy, each supporting the students they like, and now some of them are directly using the academy to make trouble to the imperial court, as long as one is not handled well, the glorious Changkong Academy will inevitably collapse.

Li Tai just saw this, but as a student and half of the academy, it was not easy for him to go directly to the book, so he could only admonish through this method, because in the audience, the factions below were very clearly divided.

Moreover, Li Tai's implicit words, that is, Liu Xu must come back quickly, in the academy, many times, Liu Xu is really important, for example, if Liu Xu is here now, he will never allow such a thing to happen, the academy is the academy, and it is definitely not a tool for people to seek power, this is what Liu Xu said on the first day he opened the academy!

"Shouldn't I take out Liu Xu's letter before he went to Goguryeo?"

Before Liu Xu left, he had already thought about all the accidents, what he was most worried about was Xiaoya and Yun Yan, the academy was the umbrella of the two of them, as long as the academy was there, no one could touch them, so Liu Xu had already left a letter, whoever dared to use the academy to seek power for personal gain, then he would get out of the academy, and the academy would never recognize him again.

Everyone knows the truth of people taking tea and cooling, especially students from poor families, once they leave the academy, the road will be extremely difficult.

Moreover, Liu Xu left more than one letter, if he had an accident, begged himself not to punish the soldiers he brought, it was this letter, so that Li Er's heart was always calm, although Liu Xu went to Liaodong, but it seems that this sentence is like a spell, Liu Xu will have an accident, sure enough, the continuous changes made Li Er useless for several days to smile, until he heard the news that Liu Xu sailed to the sea, and then relaxed.

"He's coming back, let him deal with it himself, this matter is a bud, as long as this matter is dealt with, the academy will really last for generations, otherwise, it will be a flash in the pan, and no imperial courtier will allow such an academy to exist."

Li Er took the letter back again, Li Tai had already completed his experiment, of course, he had a second test, that is, Feitian, a king-size umbrella, the umbrella fell to the ground, and the eggs were not broken, which proved that as long as the umbrella was big enough, even if it was a person, it would be safe and sound.

The two experiments directly caused a sensation in Chang'an, and while people were thinking about the truth of moving the whole body, Li Tai also firmly occupied the throne of one of the two smartest people in the Tang Dynasty, and the academy also quieted down, Li Tai's meaning was obvious, Liu Xu and I didn't jump, you just do your studies quietly, if you want to be an official, go brightly, don't engage in those others!

Yun Yan took Xiaoya from the academy back to Afang's mansion, although this is not Zhenghou Mansion, but now they prefer it here, not only safe, but also comfortable, after all, this is the biggest shadow left by Liu Xu.

The excitement of Chang'an can't reach the frontier, Liu Xu doesn't know, Xiao Wu naturally doesn't know, she is now holding a charcoal pen and carefully depicting a picture, this painting is very unpopular, it is a kind of painting called sketching that Liu Xu said, but it is very true, portraying the characters, and it needs to be like a figure rather than a god. Of course, in the end, everything is the same way, and now Xiao Wu is carefully sketching Liu Xu's eyes, wanting to paint more affectionately, but no matter how he paints, he still looks like a bad smile, and in the end, Xiao Wu himself is happy, this guy is a villain!

"National Teacher, Your Majesty invites you to go, saying that the pill has been refined, Your Majesty wants to ask you to see, can you take it?"

A woman saluted respectfully, Xiao Wu came back to his senses from his contemplation, turned his head to look at the time, turned back to look at Liu Xu's portrait, smiled slightly, and got up.

Villain, Xiao Wu doesn't seem to be able to go back now, you said, the most beautiful thing in the world is the flower on the other side, the most poisonous in the world, nothing more than the snake and scorpion, but these, in front of the poppy, don't seem to be anymore, I touched the taboo in your heart, can you go back?