When the math class started, Li Chengqian was really insightful, what the hell is this crazy plumber? If the officials in charge of water conservancy also have this virtue, shouldn't they be pulled to death first? What the hell are those crazy rabbits and chickens? Caught too much game?

For such a mathematical problem, Li Chengqian, who consciously has a good arithmetic level, has been in a state of confusion, while Xi Junmai is easy to do and has a bit of relish, but Xi Junqing has an indifferent look, obviously disgusted that such a topic is too simple, and is a little disdainful.

Lin Sen threw a comforting smile at Li Chengqian, who was scratching his ears and cheeks in a hurry, and then walked to Xi Junqing's side and gave him some questions alone, which calmed him who was a little impatient.

turned around again, but met Li Chengqian's seemingly loveless eyes again, it seems that these topics have hit him quite hard.

"Well, Xi Junqing is more talented in mathematics, but he is not very good at Chinese, he is a little taciturn, I can be regarded as teaching according to his aptitude.

Your Highness, you have a deep literary attainment, so don't compare your own shortcomings with the strengths of others. Lin Sen walked up to Li Chengqian's side and whispered persuasion.

For the prince of a country, confidence is obviously a very important thing.

"Your Highness actually needs to be able to use people, such as asking Xi Junqing to do math problems, and asking Xi Junqing to buy and memorize the three-character scripture. Haha......"

Lin Sen made a simple analogy, which made Li Chengqian, whose eyes were a little dim, become confident again, and laughed happily with Lin Sen.

"Do you have any textbooks here? Would you like to take it back and see if it works? Li Chengqian asked with a sincere smile.

"I dictate mathematics, and I teach it wherever I want to, which is some of the rules I have discovered from daily life, and when I teach it, I just find an example from life, and there is naturally no textbook.

However, Xi Jun bought them and wrote a lot of exercise books, maybe you can let His Highness take them back and take a look, and ask me at any time if you have any questions.

The language part, it seems that these things that they have memorized are also required to be copied many times, so let them find them. Lin Sen thought about it for a moment, shrugged his shoulders and replied.

"Okay, thank you here." Li Chengqian got up and gave a solemn salute, and the bluffing Lin Sen quickly stepped aside.

"You can take this gift." Li Chengqian said seriously.

"In the future, don't call His Royal Highness, just call a certain person's words, or you can call a certain Li Dalang." Li Chengqian is showing closeness.

"Okay, then I'll call you smart in the future." Lin Sen didn't plan to see too much, he was always too restrained, and he was actually very uncomfortable.

When he got along with Cheng Yanjin and them, he was not too polite, and the souls from later generations were not used to such rules and regulations, so it was better to be casual.

After the math class, which almost left a psychological shadow on Li Chengqian, Lin Sen took Xi Jun to buy the two brothers and ran outside with Li Chengqian.

It was neither for hunting nor going out to see the scenery, purely because he didn't know how to talk about physics, so he simply took the method of asking random questions.

Whatever questions the two students think of, he will answer whatever questions they have, so that he can save trouble, and the two students can also understand the truth behind many common things in life.

Even in Li Chengqian's view, it is difficult to ask why the leaves fall in autumn, why it snows in winter, why the water freezes, and so on.

They can be seen and touched on a daily basis, but no one has delved into why this is so, in fact, it is not limited to the realm of physics.

And Lin Sen can always solve their doubts and give them a more complete explanation almost without thinking, Li Chengqian often has a feeling of sudden enlightenment, and he can't help but admire Lin Sen's extensive knowledge.

Lin Sen didn't think that his performance at the moment would have such a highlight effect, for people who have read "100,000 Bad Jokes" since childhood, no, "100,000 Whys", of course he can come up with these questions and give a reasonable explanation.

Even if he can't think of a specific reason for a while, he can use his mixed knowledge from later generations to think about it comprehensively and give a plausible reason.

Who made him love to read since he was a child, and he knows more or less about any type of knowledge, even if he will be regarded as an encyclopedic figure in the family in later generations, and he should be qualified to be called erudite and knowledgeable when he puts it in the Tang Dynasty.

"I must ask you more for advice when I have the opportunity in the future, your knowledge is too extensive, and there is something to say, thought-provoking, and I admire you." Li Chengqian said with admiration.

"Well, I can't talk about Guangbo, it's just that I'm idle, and I like to think about something that I don't have.

As the saying goes, 'everywhere is knowledge, and the practice of human feelings is the article'.

I'm still far from doing both, far from it......" Lin Sen waved his hand, pretending to be "I'm not proud at all", and said modestly.

Is this another bow to my handsomeness? Alas, it seems that I have to keep a low profile lately, especially in front of this one, in case he wants to mess with me.

"Everywhere is knowledge, and the practice of human feelings is the article? You can say that again. Li Chengqian still said appreciatively.

Assign homework to Xi Jun and the brothers, even if the day's teaching is over, they have another stir-fried dish with Li Chengqian, it is also very good to order stir-fried fresh vegetables this day, it can't be all hot pot.

Although he was a little reluctant, Lin Sen still said goodbye to Li Chengqian and his party, mainly because Lin Sen was a little reluctant to take care of the cute little angel, and even more reluctant to take care of Cheng Huaiyu, who had been taking care of the two cute little guys and had no time to talk to him alone.

As for Li Chengqian, it's good to leave before the real foundation burns.

Seriously prepared a lot of fresh fruits for the little son, so that she could go back to honor Li Shimin and Empress Changsun, and then take out some fresh vegetables, even if it was a gift for Li Chengqian.

In private, Lin Sen took out several carefully carved wood carvings of cute images and gave them to Cheng Huaiyu, and also used a wooden box to pack a few fresh moon flowers as a surprise, which can be regarded as a real send-off of this group.

As for the golden silk nanmu used for this carving, it is naturally difficult for Lin Sen, last time I finally found such a good wood, Lin Sen first got a lot of cuttings back and planted them, most of them have survived until now.

Lin Sen controlled some of them to grow quickly, and then simply grew into the shape he wanted to carve, and just peeled off the bark and polished it a little.

Cycle this process a few more times, not only will the desired wood carvings be available quickly, but those nanmu seedlings will also seem to have not changed, and there is no need to worry about exposing the secrets of the system.

After returning to the East Palace, Li Chengqian couldn't wait to gather all the people in his mansion, and put all the things that Lin Sen contributed in front of them, and asked them to carefully study whether these things were as important as he thought.

The conclusion he came to really excited him, but in fact, inadvertently, it also set up a powerful enemy for Lin Sen.