There was almost constant applause in the classroom. Although Li Mo was similar in age to them, his knowledge accumulation was indeed deeper than theirs. The two sides were not on the same level.
After Li Mo finished answering the questions about He Shibi, he then said, "Are there any other students who have questions?"
"Teacher, I have a small request?" A relatively delicate-looking girl sitting in the back raised her hand and took a pendant from her neck. "Can you please help me check whether this jade pendant is it is true?"
This is to test his jade appraisal ability on the spot.
Li Mo said in his heart, you won't be convinced unless you use some means. He walked to the back and reached out to take the jade pendant that was passed to him. He glanced at the girl and asked, "Who gave you this jade pendant?"
"My boyfriend said it was inherited from his family and has been passed down from generation to generation since the Republic of China."
"Is your boyfriend also a student of Beijing University?"
"That's not true. He is in another university in Kyoto."
Li Mo returned the jade to her and said: "We generally say that jade can be divided into old jade and new jade, good jade and bad jade. If the jade pendant in your hand is really handed down from the Republic of China, it is old jade. That is ancient jade, but unfortunately the jade in your hand will not take more than a year to complete."
There was an uproar immediately in the lecture theater.
"Impossible, look at this jade pendant. There is still a clear color in it. My boyfriend said that it would take at least a hundred years to form such a clear color effect."
The girl frowned, suddenly a little unhappy.
"Classmate, don't worry, I haven't finished my words yet. Your jade is not only new, but also inferior, of average quality. As for the clear color you mentioned, it was artificially made." Li Mo said. Walking back, he said as he walked, "We are all top academics. You don't understand many things, but you will suddenly realize it after I teach you. Regarding Qinse, from a physical point of view, it is a substance due to molecular motion. As for the effect of penetrating into jade, this kind of penetration is irregular. The deeper the penetration, the weaker the penetration effect of material molecules. Can everyone understand this phenomenon? "
This is very clear. Who can't understand it? Doesn't this doubt their IQ?
"Please ask that female classmate to take a closer look at the jade pendant in her hand and see what are the characteristics of the clear color inside it?"
Not only was she watching, but the classmates around her and behind her stretched their heads to have a look.
"Does it look like it was done artificially?"
"It's true. You see, the green color of this jade pendant is almost formed into patches. There is a certain pattern. The distribution of the green color is unnatural."
"Let me go, your boyfriend is such a thief. He wants to trap our talented girl from Kyoto with a piece of broken jade. It is simply a delusion."
"School girl, break up with your boyfriend as soon as possible. We at Beijing University are full of talented people."
The female classmate sat down on the chair with an ugly expression and stuffed the jade pendant into the small bag she carried with her.
Li Mo returned to the podium and kindly reminded: "Classmate, the color in your jade pendant is a chemical substance, so the effect on the surface is very rich and beautiful, but if you wear it for a long time, it will affect the human body." Healthy. If you wear it close to your body, it may cause skin diseases. Of course, if you still have doubts, we have many experts in the history department, you can ask them for advice."
"No need, teacher, I believe what you said. I have been wearing this jade pendant for about a month, and the skin on my chest keeps getting small red spots. Applying ointment only relieves it, but if I don't apply it, the attack will continue. Now it seems, It’s all caused by this piece of bad jade.”
"In that case, let's move on to this topic. In fact, my specialty is porcelain, but so far, we have not returned to this important topic. The next student who asks questions should pay attention and not deviate from the normal track."
Li Mo opened the lesson plan. If no one asked any more questions, he would throw out one or two points and focus on the knowledge points about porcelain.
"Teacher, can I ask a question?"
A small female student on the far left in the first row raised her hand timidly.
"Of course, what do you want to ask?"
"I know an elder who has a Tang Sancai at home. Several experts have identified it, and they all said it was a fake. However, my elder denied it and insisted that his Tang Sancai was authentic. And the reasons why the experts identified it as a fake were all It’s the same, saying that the Tang Sancai in my uncle’s hands is porcelain, not pottery. I want to ask, are the Tang Sancai pottery or porcelain?”
Li Mo glanced at the girl thoughtfully. It seemed that the elder she mentioned was probably a close relative. However, he did not break the casserole and asked the question, but replied: "First of all, I want to remind you that if the Tang Sancai in the hands of your elder is genuine, it is of amazing value. Before it is finally confirmed whether it is genuine or fake, it is still Protect it."
"Before answering this student's question, we must first understand what is the difference between pottery and porcelain, and what is the connection between them? In fact, even if this question is not raised now, it will be discussed in a later course."
Li Mo opened the mineral water and took a few sips, then said: "Porcelain is derived from pottery, and it is better than pottery. The biggest difference between porcelain and pottery is that they are fired at different temperatures. Pottery uses low temperature, while porcelain is fired at a low temperature. The temperature must reach 1200°. If the temperature is lower than this, pottery is fired, and vice versa. Because the firing temperature is very different between the two, the porcelain effect on the surface is also obviously different."
"So is Tang Sancai pottery or porcelain? From the unearthed samples and some documentary evidence, Tang Sancai belongs to low-temperature pottery. It is a kind of pottery. Its full name is Tang Dynasty Sancai glazed pottery. The main glaze colors of Tang Sancai are yellow, Green, white, brown, blue and black, among which yellow, green and white three-color glazed pottery is more common.”
"As for whether the Tang Sancai in your elder's hands is genuine or fake, further identification is needed."
Li Mo missed such a good thing, but he only encountered one piece of Tang Sancai, and the damaged one was dug out from the Beijing University warehouse. It was a pity, but it also reflected the rarity and preciousness of Tang Sancai.
"If there are no more questions, then I will continue with the topic just now." Li Mo coughed lightly, "I just talked about the difference between porcelain and pottery. When did porcelain begin to flourish? It was in the Song Dynasty. , the Song Dynasty had the five most famous official kilns in history..."
As he explained, everyone was fascinated.
Time passed quickly, and as the bell rang, a short open class ended.
"Dear students, my course will officially start next week. If you are interested, please sign up as soon as possible. get out of class is over."
Li Mo picked up the lesson plan and walked out of the lecture theater with a smile on his face, and the professors and teachers who were watching the live broadcast in the next classroom also walked out.
"Teacher Li, this open class was well taught. I remember when I took the first open class, I was so nervous that I never sweated on my back." Professor Zhang said approvingly, "Your performance is far better. Exceeded our expectations.”
"Lao Zhang, you're okay. After I took a public class back then, I lay at home for a whole day before I recovered."
Zhu Changping also thought of what happened when he first became a lecturer. He gently patted Li Mo on the shoulder: "You did a good job."
7017k
