Leave the construction of the factory to Yan Liben. Li Zheng returned home and took out the geography in the system library. There were many minerals in Tubo, and there were twenty-three minerals that had been discovered, and there were 36,000 tons of gold ore and 80,000 tons of silver ore.

Li Zheng recorded the locations of these minerals.

And circle it in the map.

Songtsen Gampo guards such a big treasure, but doesn't know how to use it. It's really a violent way to kill heavenly things.

Li Zheng sighed.

Li Zhi came with a bunch of books, "Teacher, what a violent way to send heavenly things?"

Little Vinzi also struggled to put down the book. Her short legs and small arms obviously couldn't carry too many books. There were only more than ten books, which made Little Vinzi sweat so much that she was tired.

Li Zheng came back to his senses and said, "Have I just spoke?"

Li Zhi put down the booklet and said, "These are newly printed books in the seal shop. They are all books on mathematics, many of which were compiled by Taoist Li Chunfeng."

Li Zheng took a look at these math books, and Li Chunfeng wrote each number of algorithms into a book.

Looking at the content, Li Zheng said: "I wrote too little, too much theory, too little practice, and the most important thing in mathematics is to do the questions."

After hearing this, Li Zhi said, "The teacher means that Taoist Li Chunfeng is not well written."

Li Zheng nodded, "First of all, what is described above are the personal stories of Master Li Chunfeng, all of which are theories and the practicality of mathematics is very high."

Li Lizhi happened to tell Li Zheng about business. When she arrived at the entrance of the study, she heard Li Zheng and Li Zhi talking, and stood at the door and listened carefully.

Xiao Yizi said again: "What's going on to be fine."

Li Zheng shook the fan in his hand and said, "Only by practicing it can the truth be produced. Knowledge must be applied. For example, these math books are divided into several books. Although Master Li Chunfeng's classification seems simple, it is missing a very important point."

Xiao Yizi listened to Li Zheng's words, although she couldn't understand them, she thought it was amazing.

Li Zhi said: "The most important point."

Li Zheng said: "Mathematical techniques are actually used in life, such as geometric problems and unit conversion, application problems and geometric problems are added together as problems, and use life examples to do math problems."

Li Zhi thought for a while and said, "Students understand it, it is called integration and integration of all the algorithms they have learned."

The child is teachable. When he saw Xiao Yizi's eyes were full of stars and admiration, Li Zheng had an old face red. He was in elementary and middle school mathematics, and he thought he had been beaten a lot by Olympiad problems back then.

After picking up the books again, Li Zhi said: "It's a pity that Master Li Chunfeng's efforts for several months are in vain again. The students will tell Master Li Chunfeng what he said."

Li Zheng nodded with the fan.

Seeing Li Zhi and Xiao Yizi leave the house, Li Lizhi also walked into Li Zheng's study, "We have some things happening in our business recently."

Li Zheng nodded while drinking tea, "What's the matter?"

Li Lizhi said with a sad look on the side: "Many people are selling our products, such as a pot of strong liquor. It is a one-month price to buy from Jingyang, but the one you buy is a three-month price to sell. Some time ago, there are promotions from time to time, and many people stockpiled our goods."

Li Zheng held the teacup and said, "Actually, it is very simple to solve this problem."

Li Lizhi looked up at Li Zheng, "What should I do?"

Li Zheng whispered: "I have to ask your father for help in this matter."

"Father?"

"That's right, give a royal certified trademark, it's best if your father writes a word. Only the goods sold from our Jingyang signs are real."

"Then the others are selling fakes?" Li Li asked.

"I didn't say that?"

When Li Lizhi heard this, she became more and more confused.

Li Zheng patiently said to Li Lizhi: "To use the brand effect, we Jingyang have our own signature brand. The spirits sold for the second time. Who knows whether they have a second processing or a water mix, but they will only smash our own signature brand."

Li Lizhi nodded.

Li Zheng picked up his pen and wrote the two words Jingyang, "From the future, our products are engraved with the two words Jingyang, and they are packaged. Only those sold in Jingyang are real goods. Of course, we don't say whether the wine that others sell us is fake."

After hearing this, Li Lizhi nodded, "In this case, the business of those merchants who hoarded our goods will definitely be damaged."

Li Zheng nodded, "That's right."

After the business was broken, Li Lizhi was once again aroused her career, "I'll go to my father to write a letter."

Li Zheng nodded, "Go, it's best if your father has written a letter."

As soon as he walked to the entrance of the study, Li Lizhi said again: "By the way, I spent another 100,000 pounds to collect grain recently. Do you still need to continue collecting it?"

Li Zheng drank tea and looked out the window and said, "Come, continue to receive."

Li Lizhi nodded and took Xu Hui to do business.

Li Zhi put a bunch of books in front of Li Chunfeng intact.

Li Chunfeng looked at the book he sent and asked strangely: "Why did you get it back?"

Li Zhi said: "The teacher said that Master Li Chunfeng's writing method was wrong. The teacher said that the most important thing in mathematics is practicality. It is not possible to have theory but not to do questions, and it must be integrated."

“Practical?”

Li Zhi nodded, "It's what Daniu taught us. He always starts with doing the questions. We learn while doing it, so we will learn quickly."

Li Chunfeng read the books he wrote and said, "It's true that I have omitted something."

After saying that, Li Chunfeng buried his head and continued to write.

Xu Jingzong has been watching the movements of Dali Temple in Chang'an these days.

His Majesty actually issued an order to let Changsun Chong come to interrogate the trial, and this news surprised many people.

Now that the position of the Dali Temple Minister is vacant, Xu Jingzong bribed several officials to inquire about the news.

In Dali Temple, Changsun Chong brought a group of prison guards from Dali Temple to show his satisfaction.

"Is it okay to live in prison?" Changsun Chong asked.

Tied to a chair, he said with satisfaction: "I was pretty good in prison. I could sleep until I was dizzy every day, and I could eat and drink for free every day. Mr. Changsun was afraid that I didn't know how sad I was in Tubo. I ate the food that was difficult to swallow in Tubo. I was worried every day when I slept. I haven't slept for a long time. I have a good time to sleep. Thanks to Mr. Changsun, I can sleep very peacefully."

Changsun Chong said, "Stop talking nonsense. I'll ask you, who is the person you have been connected with?"

Shaking his head in satisfaction, "I don't know."

Seeing that Xu Xin refused to say a punch to Xu Xin's stomach, the prison guard shouted, "Young Master Changsun is asking you what you want? Do you say it or not."
Chapter completed!