Li Er asked Xu Yang to teach Li Chengqian and Li Tai, the two princes, the art of Guigu, which was too unkind, but his reward was the legalization of Xu Yang's Zhongnanshan fiefdom and the addition of 500 people from Youzhou. So Xu Yang was just like swallowing a fly, and he went to teach the two princes to read.

But after only three days of teaching, Xu Yang fell in love with the great cause of teaching, Li Chengqian and Li Tai have now worshiped Xu Yang as a god, fiddling with strange objects all day long, I heard that Xu Yang has been teaching gravity recently.

Li Er sat in front of the table in the Lizheng Hall and scratched his head irritably, and there was a vague uneasiness in his heart, whether this ghost valley technique was a strange and obscene technique or an orthodox vertical and horizontal technique, he also didn't understand a little.

Originally, Li Er planned to let his two favorite sons listen to the vertical and horizontal techniques taught by the descendants of Guigu, after all, as a father, Li Er still hoped that his son could pass through the heads of a hundred schools, so that he would be more proficient in the way of the king of God in the future.

However, now Li Er found that things seemed to be getting more and more out of his control.

Qingque and Gao Ming, now in addition to eating and sleeping every day, just like to follow Xu Yang, one bicycle transported from Youzhou, all day long around Taiye Lake, the whole Taiye Lake near the chickens and dogs jumping, Qingque and Gao Ming from the beginning of playing with glasses, to now start to play with copper balls, two small copper balls, together, pull out the air inside, can no longer open, Xu Yang said that it is the power of atmospheric pressure, so that Qingque and Gao Ming are happy, as if a treasure, play all day long.

Li Er shook his head, leaving these messy thoughts behind, as an emperor, these children's toys still disdain to play, although he also wanted to know what the power of atmospheric pressure was, but the pride of being an emperor did not allow him to bow his head and ask for advice.

On the shore of Taiye Lake, on the white jade road.

Three people were roaming the white jade road on bicycles, a large dark blue bicycle and two small sky blue bicycles were side by side, looking harmonious.

"Mr. Xu, who invented this bicycle, it's so fun." Li Chengqian happily rode a bicycle behind Xu Yang, and there was a slightly chubby Li Tai on the side, who was also pedaling the car hard.

Riding a bicycle on the Baiyu Avenue next to the Taiye Lake is unusually comfortable, the breeze is blowing, the willows are still around, since Xu Yang ordered the craftsman to send three bicycles from Jingkangfang, riding a bicycle after the meal every day has become a must-play activity for the two princes, next to the avenue is the huge Taiye Lake, Xu Yang rides leisurely, his bicycle is much bigger than Li Chengqian and Li Tai, so it doesn't take much effort to keep it in the front.

"The bicycle was invented by my Taishizun, and at that time, according to the friction mentioned by my grandfather, I found that the rolling friction was much smaller than the sliding friction, so I carefully studied the wheels and finally transformed the bicycle." Xu Yang said triumphantly.

"Guigu thaumaturgy is really magical, yesterday I heard Mr. Xu say the word friction, Xiao Wang Xiao Wang ordered people to make small sliders of different materials overnight last night, if the falling time is really different, now Mr. Xu is talking about rolling friction and sliding friction What is it?" Li Tai was panting on the bicycle, his body was a little fat, he was dressed and fed since he was a child, he read and wrote, and he lacked exercise, and he would start to pant every time he rode a short and half distance around Taiye Lake.

However, when God closes a door for you, he will definitely open a window for you, although Li Tai's body is not good, but his mind is simply good, his memory and logical thinking are very strong, and every time Xu Yang says about physical phenomena, he will personally do the real thing, such as friction.

Xu Yang told the two princes that everything in the world has friction, and the friction of different materials is not the same, which can be seen with a small slider of different materials on the table with a small iron block pulling it down, and the landing time is not the same.

Li Chengqian just recorded this paragraph respectfully, Xu Yang felt that he didn't understand it, but Li Chengqian had a good habit of recording what he didn't understand and leaving it to understand later.

And Li Tai is completely different, he is a cute child who breaks the casserole and asks the end, if he doesn't figure it out, he will be restless, and he has to do it himself to see every real thing Xu Yang said.

Xu Yang appreciates Li Tai's research spirit very much, you must know that the nine-year-old children of later generations are still naughty in elementary school every day, naughty all day long, and these two princes have finished learning the "Book of Songs" and "Book of Rites" from Li Gang, and now they are learning the "Analects", and their literacy has exceeded more than 2,500, and I heard that Li Tai can write a good article.

In the past two days of teaching, Xu Yang continued to instill various scientific concepts in later generations to these two children, although there was no system, but it also allowed them to peek into the tip of the iceberg of great science, which greatly promoted the curiosity of the two little princes.

In the past, Li Gang taught them all boring Four Books and Five Classics, reciting them every day, opening their mouths to the courtesies of the monarch and the ministers and the people, and the way of the Three Principles and Five Constants, which made the princes' thirst for knowledge very depressed.

And now, since Xu Yang came, the two of them have completely plugged in the wings of science, soaring into the sky, looking down on the beautiful scenery brought by science, the pressure of the atmosphere, the speed of the sound transmission of objects, the formation of wind, thunder, rain and electricity, and the influence of friction, these bits and pieces of life have turned into science in Xu Yang's mouth, which made the two princes fascinated.

What Xu Yang teaches is a field that Mr. Li Gang has never mentioned, an unknown new continent, and compared with this field, the Four Books and Five Classics, the Three Outlines and the Five Constants are extremely pale and powerless, so that the two princes vaguely feel that what Mr. Xu Yang is talking about is the truth of all things, the source of the universe.

At this time, Mr. Li Gang was also happy, Xu Yang took the initiative to take over the work of the emperor and made him very happy, and he devoted himself to cultivation at home every day, Xu Yang asked him to write the Chinese syllabus has been written for more than half of it, combined with the whimsical ideas given by Xu Yang, Mr. Li Gang felt that this time was really an opportunity for him to become famous through the ages.

Riding a bicycle around Taiye Lake, the two princes were tired and sweating, Xu Yang was also out of breath, at this time, after taking a shower and changing into new clothes, it was simply the happiest thing in the world, all these were done, Xu Yang's daily teaching homework began.

Li Chengqian and Li Tai took a bath, rested for a while, and now they were in good spirits, and came to the north room of the upper study, waiting for Xu Yang to come to today's schoolwork.

The north room of the study room was originally just a place for private teaching, which was generally used by Mr. Li Gang when he opened a small stove for the prince Li Chengqian, and the room for one-on-one teaching was not very large, and it would be a little crowded to sit for four or five people.

Li Chengqian and Li Tai stared at Xu Yang on the podium in front of them with blazing eyes, the podium was also made by Xu Yang's Ministry of Works, a black board, written on it with white lime, the effect was surprisingly good, at least Li Chengqian and Li Tai looked at the things written on the board and felt very novel, never bored, and Xu Yang lived up to expectations every time, often talking endlessly, and some of the science he talked about made the two princes suddenly open.

"Okay, Qingque Gaoming, let's have a geography lesson today." Xu Yang clapped his hands, attracting the attention of the two princes. I saw him pick up the white lime and draw a big circle on the blackboard, then turn around and ask, "Do you know what the world is like?" ”