Synopsis: Xun Yu led Cao Cao into the living room and was about to arrange tea, but was stopped by Liang Xu.

Xun Yu looked at his proud student in surprise, and didn't understand what happened to him tonight.

Without waiting for Xun Yu to ask, Liang Xu himself first said the reason: "There is caffeine in the tea, and the human body will feel excited when inhaled, and drinking tea at night can easily lead to insomnia." ”

"What is caffeine?" Xun Yu asked the question that Cao Cao was embarrassed to ask.

Liang Xu regretted that he was talking too much when he heard the teacher's question, and he thought to himself: Don't talk about chemistry during the Three Kingdoms period, even physics is not a system, how can I explain it to them?

Liang Xu blushed and was speechless for a while.

Xun Yu saw his student behaving like this, and he also understood, and it was estimated that Liang Xu's final answer would also be seen from a book without a name.

It's not the first time Xun Yu has heard some incomprehensible terms from Liang Xu, although he doesn't fully believe it, but he has long been used to it, and it's really late now, if Liang Xu really says it, it will cause others insomnia.

So, Xun Yu changed his words and asked the servant to pour a few glasses of water.

Cao Cao saw that Xun Yu didn't mean to study in detail, and he was embarrassed to ask.

At this time, Liang Xu shouted to the servant before the servant left: "Excuse me, I want boiled water, thank you." ”

Xun Yu was laughed at by his students at this time, and asked Liang Xu with a smile: "Why is this?" ”

Although Liang Xu still talked too much to make trouble for himself this time, in view of the health of himself and the people around him, Liang Xu did not regret it, but he still didn't know how to explain it.

Liang Xu was stunned again, while the servant in charge of the tea looked at the head of the house, waiting for the head of the house to make an idea.

Xun Yu didn't wait for his students to say the answer, so he said to the servant first: "Just do what Xu'er said." ”

When the servant received the order of the master of the house, he agreed and withdrew first.

Regarding drinking boiled water, Liang Xu and the people of the old Zhang family all started to do it as early as when Liang Xu could speak, and they were doing it according to this rule.

Liang Xu has never dared to neglect this kind of health problem, because the medical level of the Han Dynasty is too poor, and even a cold will kill people.

It's just that Liang Xu didn't live with Xun Yu before, and Xun Yu usually drank tea and didn't drink much water, so Liang Xu didn't think of this thing.

Now, to explain not to drink raw water, it involves germs, microorganisms that cannot be seen without a microscope, and this cannot be explained.

Liang Xu could only say vaguely: "Drinking boiled water is less likely to get sick." ”

"Why is that?" Xun Yu continued to ask like a curious baby.

Cao Cao just sat on the side and didn't squeak. He was also very curious about this question, but he was even more curious about the pair of masters and apprentices in front of him, and he found that the person who taught and solved doubts was not Xun Yu who was a teacher, but Liang Xu, who was a student, knew more, which felt very strange.

Liang Xu was forced to be helpless, so he could only say the truth: "Because there are many microorganisms in raw water that our eyes can't see, and some of these microorganisms can make people sick." But as long as it is heated, it can kill most microorganisms. ”

After hearing this, Xun Yu just smiled and didn't say anything more.

Although Cao Cao felt that Liang Xu's statement was incomprehensible, but seeing that Xun Yu did not continue to investigate, as if he recognized Liang Xu's appearance, he suspected that he was just too lonely and unheard, so he didn't know what "microbes" were.

After such a show, Liang Xu's mood has calmed down.

Because before Liang Xu met Xun Yu, he never thought that he could have a relationship with Xun Yu, let alone the current teacher-student relationship that was very important in the Han Dynasty.

At that time, Liang Xu was just chasing stars, and he just wanted to see the demeanor of historical figures.

Even if Xun Yu is really abducted by Lao Cao in the future, Liang Xu can study with Xun Yu for so long, in fact, he has already earned it.

Besides, if Xun Yu really enters the Cao Wei Group like his original history, with Xun Yu's influence, it will be much easier for Liang Xu to cooperate with the Cao Wei Group in the future, at least there is a weighty person who can help talk about it.

Now that he wants to open it, Liang Xu's star-chasing plot has begun to be active again, and this time it is of course aimed at his idol Cao Cao.

Liang Xu asked Cao Cao a very embarrassing question with great interest: "Uncle Cao, I heard that your father, that is, Ling Zun, was passed on to the late Cao Shizhong. Before your father became a father in the recognition of Cao, was his surname Cao or Xiahou? ”

The question asked by Liang Xu involved Cao Cao's **, and according to legend, the relationship between the Xiahou brothers and Cao Cao was so good because Cao Cao should have been a member of the Xiahou family.

And whether it is in later generations or in the Eastern Han Dynasty, it is an offense to ask others like this. In particular, this directly uncovered Cao Cao's scars, and Cao Cao was precisely because his grandfather Cao Teng was a eunuch, which caused him to be not a human being on both sides of the court.

Only Liang Xu, a guy who relies on himself as a bear child, dares to ask this kind of question in front of others.

As soon as Xun Yu heard that his student would ask such a question, he immediately reprimanded: "Xu'er! How do you speak? Apologize to Brother Meng De. ”

Although Xun Yu seems to be teaching his own students, he is indeed teaching his own students, but at the same time, he is also asking Cao Cao for forgiveness for his students: You Cao Cao and I are the same generation, children said the wrong thing, we adults have a lot, so don't be too knowledgeable like children.

But Liang Xu actually added to Xun Yu very aggrievedly: "The student really wants to know." After finishing speaking, his big eyes looked at Cao Cao unblinkingly and innocently, waiting for Cao Cao's answer.

Originally, Cao Cao listened to Xun Yu's plea just now, and he also thought that Liang Xu was a child and was not sensible, so forget it, who knew that Liang Xu actually kicked his nose on his face, and his white face immediately turned black.

Liang Xu saw that the situation was wrong, so he opened his mouth to defend himself: "Uncle Cao, the little nephew didn't discriminate against you after being a eunuch, don't misunderstand." I just really want to know if you were originally from the Cao family or from the Xiahou family. ”

After listening to Liang Xu's explanation, Cao Cao's face recovered a little, but he was poked by Liang Xu in his sad place, and his originally good mood became gloomy.

Cao Cao replied weakly: "Cao's ancestor is also surnamed Cao, and he has nothing to do with the Xiahou family. However, Cao and the Xiahou brothers in Qian County had a bad relationship. I don't know where the little brother heard that Cao's ancestor was from the Xiahou family? ”