"Chong'er, come, come here."

Guo Jia beckoned to Cao Chong, and Cao Chong immediately ran over obediently.

Guo Jia touched Cao Chong's head appreciatively, compared to Cao Zhi, it was really Cao Chong who was better. Speaking of intelligence, Cao Chong is definitely not worse than Cao Zhi, and even surpasses it. Obedient, sensible, well-behaved, smart, and moreover, people are also beautiful and very cute. To use a modern phrase - so cute, it must be a boy.

It's a pity, Cao Chong is a cute little Zhengtai, if it's a little Lori, then it's good, cough cough cough.

All in all, Cao Chong has often loved to run to Guo's mansion since he was a child because of Cao Xi, and it can be regarded as Guo Jia's growing up a little bit, which is definitely familiar. To say that among Cao Cao's many sons, the closest to Guo Jia is definitely Cao Chong, and Guo Jia also likes this little Cao Chong the most. You must know that whether it is Cao Pi or Cao Zhi, they are all big perverts who inherited their father, only Cao Chong, who is still young and obedient, reassures Guo Jia more, at least there is no "criminal record" in history, right?

Now that Cao Zhi has been passed, it is better to cultivate Cao Chong from an early age, so he can be regarded as himself. Moreover, he is young and has strong plasticity, if he can cultivate Cao Chong into a character like Zhao Yun and respect his teacher, then Guo Jia will definitely rest assured in the future.

Cao Chong looked up at Guo Jia, his delicate face was flushed, and the whole person looked cute. For a while, Guo Jiadu almost fell into the rumor at the beginning. Nima, the difference between the beautiful little Zhengtai and the beautiful little Lori is really not much.

But immediately, Guo Jia was instantly pulled back to reality.

"Master!" I only heard Xiao Zhengtai Cao Chong shouting crisply.

The sound is nice and the content is normal. But in Guo Jia's ears, it seems a little weird.

Chong'er? Master?

What a familiar word. At first glance, when people hear this title, what do people usually subconsciously think of? That's right! Ling Hu Chong and his master Yue Buqun! Boy. Yue Buqun finally practiced the swordsmanship of warding off evil spirits, and cut a small cock from the palace, which was too unlucky.

So Guo Jia hurriedly said,

"You won't be called Chong'er in the future."

"Huh??" Cao Chong was stunned, where can this name be changed. Moreover, even if you, Guo Jia, are his Cao Chong's master, this name can't be changed by you.

Guo Jia also realized that his words were wrong, and said instead,

"I mean. Don't call me Master from now on. ”

In an instant, Xiao Zhengtai Cao Chong's eyes turned red,

"Master, don't rush it, woo woo woo ~~~~~"

Guo Jia: "%@%¥#%@#@......@¥......"

Depend on! This kind of student can't be taught at all!

Guo Jia: "......"

Cao Pi: "......"

Guo Jia sat and drank tea, Cao Pi stood respectfully beside him, the two of them have been in this state for a long time, and Guo Jia has not spoken. Cao Pi never took the initiative to speak, and his impatient expression was not revealed at all.

Guo Jia picked up the tea bowl and slowly sipped it lightly, and finally put down the tea bowl. Speak,

"You should know these days. I've seen quite a few of your brothers. ”

"Students know." Cao Pi replied, and then remained silent. Didn't say anything more, said it. It's really a bit similar to Sima Yi's style.

"To tell you the truth, according to my observation these days, among all your brothers, the person I am most optimistic about is you, Cao Pi!" Guo Jia said directly to Cao Pi. Of course, Guo Jia's words are definitely not lying, although the person he was most optimistic about at the beginning was indeed not Cao Pi, but after these days of "observation", he finally returned to Cao Pi.

As soon as he heard Guo Jia's words, Cao Pi immediately bowed and said in fear,

"The teacher praised it falsely, how can the student be virtuous. Compared to my younger brothers, the students are really, really, stupid. Cao Pi looked ashamed.

"It's okay to be stupid, sometimes, it's not good to be too smart." Guo Jia said, yes, it's like students are better than teachers, so it's better to teach Mao! Of course, a truly competent teacher must hope that students will be smart and that students will be able to stand out from the blue, but Guo Jia is definitely not such a great guy. Out of the blue? Is it funny?,The most annoying thing is the kind of student who asks the teacher with a difficult question.。 What's more, the most annoying thing is the kind of bastard who knows how to do it himself, and deliberately asks the teacher with a difficult problem! That's right, it's you, Cao Zhi, don't look around, give me to the door to punish the station!

"Since ancient times, there have been some things, as long as you cultivate morality, study diligently, work tirelessly day and night, and do not violate the morality of being a son of man, this is enough." Guo Jia said.

"The students understand and hope that the teacher will give more guidance." Cao Pi immediately replied.

"Well, the real talents are often all-rounders, and all kinds of disciplines are slightly involved. In today's first lesson, let's start with something simple. The Pythagorean theorem, I don't know if you've heard of it. Guo Jia opened his mouth and said, although he is a liberal arts student, but in front of these people, Guo Jia can only show off his science knowledge, just like fooling Liu Ye back then.

"Hook three strands, four strings, five?" Cao Pi asked. This kind of thing was recorded as early as the Western Han Dynasty's arithmetic book "Zhou Ji Sutra", and Cao Pi had also heard of it.

Guo Jia nodded, quite a little insightful,

"Then do you know why it's a hook three, a four, a string, a five?"

"The students don't know." Cao Pi replied, knowing is knowing and not knowing is not knowing, and knowing is also knowing. At least Cao Pi won't pretend to understand.

Nonsense, if Cao Pi knows, then he is called a god, although it can't be said that no one in the world knows, but those who can know are definitely called mathematicians of this era, Cao Pi He may be a mathematician? He is the only one who is a mathematician, physicist, chemist, biologist and so on. Besides, if Cao Pi even knows this, then what else will Guo Jia teach.

"The reason why it is a hook three strands, four strings, five, is because the square of three plus the square of four is exactly equal to the square of five." Guo Jia explained proudly.

"This is something that students don't quite understand." Cao Pi said with a frown.

"Oh, the square of three is three times three, the square of four is four times four, and the square of five is five times five." Guo Jia hurriedly added a concept.

"This is something that students don't quite understand." Cao Pi said with a frown.

Guo Jia's eyelids jumped, well, the ancients really didn't dare to compliment this mathematical ability, so he said a little more carefully,

"Three times three equals nine, four times four equals sixteen, and five times five equals twenty-five. And nine plus sixteen equals exactly twenty-five. ”

"This, student......" As soon as Cao Pi opened his mouth this time, Guo Jia immediately gritted his teeth and interrupted,

"Three times three means three together, three plus three plus three; Four times four is four added together, and so on. ”

"The students still don't understand this." Cao Pi said weakly.

Grass! This kind of student can't be taught at all! (To be continued......)