Then raise a piece of hands below.

Su Shi was a little confused, and Su You reminded: "When someone asks questions in class, you must raise your hand first. Whoever you ask the sir can speak."

Su Shi nodded and smiled at Su Xiaomei.

Su Xiaomei stood up and said, "Sir, we learned that 'Golden produces Lishui, Yu comes out of Kungang'. Brother Xiaoyou said that Lishui is the Jinsha River and also flows through our Jiamei territory. Gold can be washed out from the sand in the water there."

"Brother Xiaoyou also said that Lishui's gold is not only gold, but also copper, iron, and many metals. It is under our feet that is rich in minerals. It is because of this sentence that he inferred this situation and taught us to wash out iron sand by the glass river, and we can also wash out sand gold."

Su Shi was very curious: "Is that so? Show me!"

Su You coughed and whispered: "Sir, you are still in teaching time."

Su Shi smiled awkwardly: "Okay, let's talk about the next two sentences, 'Sword name Juque', which means there is a famous sword, the most precious thing in the world, and it is called 'Juque'. It is said that it was created by Ou Yezi, a famous scholar in the Spring and Autumn Period."

"It is said that at that time, 'Chijin's mountain broke out and tin came out, Ruoye's stream dried up and copper came out, Rain master swept, Thunder drums were thunder, dragons held the furnace, and Emperor Tian loaded charcoal; when the sky was watching, the essence of the sky was under it."

"Ou Ye was based on the spirit of heaven, and he was skillful in his skills, and he created three major punishments and two minor punishments; one was Zhanlu, two was Chunjun, three was Shengxie, four was Fish Intestine, and five was Juque'."

"These five swords, three long and two short, are the origin of the idiom we often use."

"It is said that when the Juque sword was first completed, the King of Yue wore it and sat on the terrace. Suddenly, a carriage in the palace lost control and rushed straight, frightening the white deer that was being raised in the palace."

"Then the King of Yue pulled out the sword that Ouzhizi had just forged, pointed at the rampage carriage, and wanted to order the warriors to come forward to stop it."

"However, just as he drew his sword, the sword energy in his hand cut the carriage into two sections. So the King of Yue ordered someone to take a large iron pot, and stabbed the iron pot with this sword, and made a big gap in the bowl, effortless, as easy as cutting rice cake."

"The King of Yue named this sword Juque. The so-called 'Work through a copper cauldron, the iron is sharp, and the stern is like a pile of rice, so it is called Juque'."

"Cai rice means rice cake, and que means big gap, which later extended into big gap, which means big mistakes. Therefore, Juque means big gap."

After saying that, he raised his teaching stick: "I have a sword called Dadakouzi!"

The children all laughed, and then many people raised their hands.

Su Shi ordered one, and the child stood up and said, "Brother Zizhan, copper-tin alloy, got bronze. Due to the material limitation, it is impossible to be harder than steel. I can only say that the copper cauldron at that time had too poor quality!"

Su You quickly interrupted: "We are now taking a text class. These should be listened to as beautiful legends, or rather, they are the pursuit and deification of the sharp and tough divine weapons by the ancients."

"In fact, it is easy to use the weapons made of iron sand we have found to pass through a thin copper pan and pass through a bamboo tube filled with thick iron sand. Uh... Zizhan, continue."

Su Shi said: "'The pearl is called night light', which is about the pearl of the Sui Hou. It is said that when the Sui Hou went on a trip, he saw a big snake being injured and interrupted. He suspected that it was supernatural and asked someone to seal it with medicine. The snake could leave, so he called it the 'Broken Snake Hill'."

"After more than a year, the snake holds a bright pearl to repay it. The pearl is full of inches and pure white, and there is light at night, like the moon shining, and it can be used to be candles. Therefore, it is called the "Sui Houzhu". It is also called the "Spiritual Snake Pearl", and also the "Bright Moon Pearl". This record comes from "Su Shen Ji".

"This bead is called the second treasure of Spring and Autumn Period, and the princes fought for it and was finally owned by the Chu State. When Qin destroyed the six kingdoms, he returned to the First Emperor. The First Emperor ordered the Heshi Bi to be engraved as the seal, and the story followed was continued to the Three Kingdoms. However, there was no record of the Sui pearl, and it was probably buried with it."

"About the Night Bright Pearl, several more appeared afterwards. Zhang Heng's "Xijing Fu" says: "The night light flows through Xuanli, and the pearl is adorned as a candle." This means that there is also a bead called Xuanli, which has the same nature as the Sui pearl."

Then someone raised his hand, Su Shi pointed Zhang Qi, but Zhang Qi turned around and said, "Young Master, do you know what it is?"

Su You smiled and said, "The world is so big that there are all kinds of strange things. Things that can shine, such as dry bones, fireflies, and some mushrooms, all have this phenomenon. Actually, I don't think it's very strange."

"This thing has only appreciation value, it is just that the mineral materials are rare. Grinding into a bead is not technically difficult, it cannot reflect a country's true strength and technical reserves, nor can it bring any benefits to the people."

"In my heart, it is not as good as the fish that my third brother cooks every day, the pottery that my seventh brother cooks every day, and even the little kimchi that my younger sister makes every day is better than it."

The children laughed again.

Su You said: "So I said that the science and engineering we are studying now can help the Song Dynasty build more useful things in the future, build roads and bridges, strengthen cities, light boats and chariots, and expand products. This is the pearl of the Sui Dynasty and the jade of the He family that everyone should master."

A group of kids applauded warmly, and even Su Shi nodded repeatedly.

Next is the science and engineering course. Today is still the basics, the consolidation of addition and subtraction, and the introduction to multiplication.

Then the nine-nine multiplication table was written on the other side of the blackboard.

After the class, Su You said, "Today, Brother Zizhan not only explained the text to us, but also told two short stories related to the text, which are much better than me. From now on, I will ask Brother Zizhan to teach us literature classes every day, okay?"

Su Shi was shocked, but the children applauded warmly again. The fat brother's writing course was as interesting as the young master's science and engineering course!

Su Shi couldn't help but smile bitterly and said, "Mingrun, are you pulling me into the trap..."

Su You smiled and said, "Teaching and learning from each other. I talk about liberal arts, it's really far from you. If you feel tired, then pull Ziyuya up, you two will be together for a day."

Su Shi said, "I'm afraid he will scare the children, so I'll have a face all day long... Forget it, if you can take care of my supper, it's guaranteed that it's not worse than the tofu rice, then I'll come over."

Su You laughed: "Zizhan, you are such a foodie!"

Su Shi smiled and said, "A real foodie, you can turn decay into magic. By the way, what's going on with the symbols you just used to calculate? I think they calculate so quickly..."

Su You said: "That's easy to write. After writing it in one stroke, it saves time. I learned from Sanskrit."

Su Shi shook his head: "Your Sanskrit word is wrong."

Su You was immune to Su Shi's extensive knowledge and broad knowledge and said, "Use Sanskrit, that is for the convenience of writing. The first and second of Sanskrit are too close, so I changed it. If the text cannot be changed, we are still painting the large seal stone drum."

Su Shi said, "It seems to be right... Where are you going, little sister? Come here and take me to see the sand gold you have bought. Brother Zizhan will test it for you to see if it is true!"

Su Shi had a wide range of hobbies. He watched Li Shuanzhu for an afternoon of watching Taotiesha. He saw him with his own eyes scooping out a grain of sand gold the size of a mung bean, and then he was satisfied.

Until the cloud board rang, everyone returned to the dining table together.

In the Tudi Temple now, there are many tofu and fish. Today, Suyou made tofu and roasted fish.

Even though the soy sauce has not yet come out, Su Shi has already praised it.

Looking at the thriving Land Temple: "Mingrun, this is a small peach garden."

Thinking of his future fate, Su You couldn't help but say, "Zizhan, since you like food so much, why don't you learn how to cook with me?"

Su Shi flatly refused: "No, I am addicted to something and it takes a long time to not make a name for it. I will not give up now. I will go to Qingshen to study after the New Year, and then I will take the Examination for the Interpretation. There is not enough time."

The exams in the Song Dynasty were very painful. The third-level examination of Jieshengdian must be passed at one time to be considered successful, otherwise you will have to start over from the first step in three years.

Su You bumped into Su Shi: "I'm afraid there is Yan Ruyu in the book, right?"

Su Shi's face turned red all of a sudden: "Uncle Xiaoyao, you are really a little bitch..."

Oh, this is the default, Su You suddenly thought of another question: "Wait, then I'll bring you to teach, will Cousin Mingyun curse?"

Su Shi said: "My father never cared about us. Besides, he had to play until he was 27 and started to attack the imperial examination. What qualifications do he have to say to me?"
Chapter completed!