It's been a month since the official start of class, and the time has entered November, the weather has become much colder, and people have begun to hope more and more in the warm quilt in the morning, and do not want to get out of bed. However, this is nothing to Xu Daozhi, since he insists on exercising every day, there are no signs of cold intrusion, and a single coat and a coat are enough to cope with this kind of weather. And after forming a habit, it's a little uncomfortable not to get up every day. So as long as the weather permits, Xu Daozhi will run to Zhenwu Lake to exercise.

This day happens to be Tuesday, the whole morning is by Zhang Qiaoyang old professor of the "Theory of Traditional Chinese Medicine" class, this old professor is famous for the iron face, on his class, the implementation of the sign-in system, every time he goes to class, he will make a good list, sit at the door of the classroom, watch you sign to go in, if you are late for no reason, you will be deducted the total score at the end of the term, late will be deducted one point at a time, absent from class without reason, one point will be deducted at a time, the passing line of this course is ninety, the full score is only one hundred, which means that if you are absent from class for no reason, Then unless you get a full score in the final exam, you will have to retake this subject in the coming year. There are people who defy the law on the school forum. The result is needless to say. So to take this old professor's class, no one dares to be late or absent for no reason.

Xu Daozhi exercised in the morning, and when he came back, he rushed to the dormitory, he wanted to ask Li Jiajun and He Haiquan to get up, these two guys have been very good at bed recently, especially He Haiquan, his hometown Lin Haixueyuan's house has been on fire this month, and there is heating in the house, so it is very comfortable. But there was no such thing in the south, so the quilt gave him a warm harbor. And Jin Yanjie, learning will also lose track of time. Sometimes when I ask him to go to class, he looks confused.

hurriedly ran back to the dormitory, and sure enough, I saw the two of them still lying on the bed, while Jin Yanjie was still reading. So he hurriedly shouted: "Two big guys, get up." Let's see what time it is. After shouting a few times, Li Jiajun spoke up: "Say goodbye to Xiaodao, we woke up, but the nest hugged us tightly, and we were reluctant to leave." He Haiquan also said at this time: "Yes, the quilt is too enthusiastic, and he refuses to let me go, I really want to shush now, but I am trapped by the nest, and I can only hold it if I can't get out." Xu Daozhi was directly angry at the shamelessness of these two people, and then said with a yin smile: "Hehe! Okay, it's really embarrassing for you, it seems that only me and Brother Jie went to Professor Zhang Qiaoyang's class today. After speaking, he went directly to call Jin Yanjie, who was still reading the text silently with his eyes closed, to breakfast, and prepared to go to class with him.

Hearing the name Zhang Qiaoyang, Li Jiajun and He Haiquan were startled, then sobered up, and immediately jumped out of the bed, and shouted strangely: "I'm, I'm leaning, today is actually Tuesday, it's his class." Xiaodao, why didn't you say it earlier, what time is it? Will you be late! As he spoke, he got dressed and came down at an astonishing speed.

Xu Daozhi said calmly: "There are still twenty minutes before class, you brush your teeth and wash your face faster, there should be no problem if we run." I specially bought steamed buns today, and we can eat them on the road when the time comes. After listening to what Xu Daozhi said, the two hurriedly went to the bathroom to brush their teeth and wash their faces, and it took a total of three minutes for the two of them to come out of it. Then he urged Xu Daozhi instead: "Xiaodao, hurry up." As for the buns, eat them while running. For these two people, Xu Daozhi was also speechless.

The four of them ran to the lecture hall, and sure enough, they saw that some students were signing into the classroom. Looking at the time, the four of them secretly breathed a sigh of relief. Not late.

When the time came, Zhang Qiaoyang received the list and officially went to class. This old professor is 76 years old, an old Chinese medicine doctor, and should be retiring. But he was hired by the school and continued to lecture, he used to teach Chinese medicine internal medicine, but he said that he wanted to give young people a chance, so he no longer taught internal medicine himself, and his disciple Yu Zhengyang taught is also a famous Chinese medicine internal medicine Chinese medicine, especially good at lung and spleen, he will audit when Yu Zhengyang teaches. And I will call it the basic theory of Chinese medicine. But this old gentleman didn't look like a seventy-six-year-old at all, his hair was gray, but he was very shiny, and he spoke with a lot of energy, and in the lecture hall, some young teachers needed to get a microphone for class, and he didn't need it, but his classmates could hear it clearly. The thinking is also very clear. So the students admired this teacher very much, although his class checking system was more uncomfortable.

"Students, in the first few classes, we learned about the formation and development of the theoretical system of traditional Chinese medicine, learned its basic characteristics, and according to what theory of traditional Chinese medicine has simple materialism and dialectical thinking. Today we are going to learn a concept that governs the theory, diagnosis, and treatment of TCM. This concept is yin and yang. As he spoke, he wrote the words yin and yang on the blackboard. After a cursory scan of the classroom, I found that everyone was listening quietly and carefully, so I asked, "What do the students know about yin and yang?" After hearing this question, Xu Daozhi just wanted to answer, but he couldn't say anything when the words came to his lips. He was actually exposed to a lot of this aspect by the "Three Character Classics of Medicine" and "Soup Song Recipes", but now he finds that he really doesn't understand what yin and yang are. So shut up. Wait and see what your classmates and teachers have to say.

This is a straight child who doesn't know which class directly shouted: "Heaven and earth are good, yin and yang borrow the law." Originally, the whole classroom was filled with the sound of buzzing discussions, but as soon as these words came out, the class suddenly fell silent, and then the classroom was filled with laughter. Zhang Qiaoyang also smiled, waited for a few seconds, Zhang Qiaoyang pressed it with his hand, signaled everyone to be quiet, and then said: "This classmate's answer is partly correct, but not all of them are correct, according to the understanding of the ancients, the sky is yang and the earth is yin, dry is yang, and kun is yin." But yin and yang are not so simple. Just a few words. The students were attracted by what Zhang Qiaoyang was going to say. Xu Daozhi also sat upright and listened intently, what he wanted to say.

"Yin and Yang are the fundamental cause of the movement and change of all things, and the root cause of their demise, and it is the ancient materialist dialectic that understands the movement and change of all things in the universe by the unified law. The answer of the classmate just now was the use of yin and yang in another aspect of ancient times. The use of Chinese medicine is more materialistic. After finishing speaking, he continued to speak: "The concept of yin and yang should not be unfamiliar to everyone, such as some houses facing the sun and some turning the yin. In the past, when you were studying chemistry, you had anions, cations. Even now, some of the clinical test results of Western medicine are also expressed as negative and positive, but the yin and yang of Chinese medicine are not exactly the same as the above. What are the things, in fact, it is very easy to understand, we have day and night, cold and heat, movement, these are all yin and yang. With that, he glanced at the classroom. It was found that his classmates were recording what he said. After waiting for a few minutes, he continued: "Yin and Yang also represent the different attributes of some things on both sides, everything that is moving, rising, invisible, light, etc., is the same, everything that is static, descending, tangible, and heavy is yin....."

For a whole morning, Xu Daozhi listened to it as if he was fascinated, and Zhang Qiaoyang quoted scriptures to talk about yin and yang, and told it clearly. The opposition of yin and yang, the mutual roots of yin and yang, the growth and decline of yin and yang, and the transformation of yin and yang. It explains how Chinese medicine is that yin and yang run through the theoretical system of traditional Chinese medicine. After hearing this, Xu Daozhi found that he was becoming more and more interested in Chinese medicine. Until the morning, after Zhang Qiaoyang announced the end of class, Xu Daozhi was still immersed in the content of the class.