In a letter to his friend Euler, Goldbach famously conjectures.

Euler simplified his proposition that any even number greater than two could be written as the sum of two prime numbers.

In layman's terms, the Goeh's conjecture is meant to prove that one plus one is true.

Goldbach's conjecture seems simple, but it is not easy to prove its correctness.

From the eighteenth century to the nineteenth century, none of the number theorists made a substantial advance on the Goethean conjecture.

It was not until the twentieth century that there was a breakthrough!

Mathematicians from Norway, Britain, and the Soviet Union have successively proved that nine plus nine, seven plus seven, four plus four, and so on, are true.

Chinese mathematicians Wang Yuan and Qiu Chengtong successively proved that three plus four, one plus four, and three plus two were established.

The famous mathematician Chen Jingrun exhausted six sacks of straw paper in a room of only six square meters, and finally solved the one-plus-two problem in Goe's conjecture.

It was only one step away from the goal of the Goehl's conjecture of 'one plus one', but it failed to take off the crown jewel of mathematics.

Li Changqing found the relevant materials from the bookshelves of the Nine Palace Academy, and the thick stacks were half a person high.

Each theoretical work is tantamount to a book from heaven to ordinary people, and Li Changqing's study and research are carried out simultaneously.

Mathematics is the queen of natural science, with its own unique charm, Li Changqing immersed in it, but he did not feel bored.

Many theories need to be checked with a pen, resulting in slow reading progress, but it is equally rewarding.

Li Changqing persevered to the limit in the Nine Palaces Academy before he withdrew from the hundred schools of thought and drank a cup of spiritual tea to recuperate.

The moonlight is sprinkled in the bamboo forest, and the fragrance of orchids is in the heart.

The little squirrel sat on the threshold with a nut in his arms and grinded his teeth, and the two weasel cubs hid under the table with joy and joy to sleep soundly.

Wood was stacked outside the windows of the wooden house, and Li Changqing chose a piece of material of moderate length to use to make the guqin.

The tools used to make the guqin are basically the same as those of the carpenter, but the production process is more exquisite.

Li Changqing has carpenter's skills as a foundation, and it is relatively easy to become a luthier.

Following the detailed steps in the remarks of the Book of Music, Li Changqing practiced how to make a guqin with ordinary materials.

The steps and procedures for making a guqin are very rigorous, and the slightest carelessness may lead to the discarding of the entire piece of wood.

Li Changqing restacked the discarded timber, and the ground was covered with sawdust.

The morning mist is like a veil that hangs over the mountains.

After Li Changqing finished reading, he poured spiritual water on leeks, cabbage, radishes, etc.

Take the leeks over the mountains and mountains, and when you pass by the door of the house, put some in the kitchen for later use.

"Qingwa, you are young, you live alone in the mountains every day, don't you feel lonely?"

Wu Xiongbo was accustomed to life in the city, and it was difficult to understand Li Changqing's behavior of living alone in the mountains.

And with the ability shown by Li Changqing, it is not difficult to make a name for himself, and asked curiously.

"Listen, there's a breeze blowing over the hills!"

Li Changqing smiled and listened to the sound of nature.

"Well, the leaves are moving. ”

"No, it's heartbeat!"

"What do you mean?"

"If your heart doesn't move, you won't be lonely!"

Li Changqing whispered, as if muttering to himself.

After binding the game of Zhuzi Baijia, Li Changqing can do many things and face many temptations at the same time.

But he kept the belief that he would continue to learn for the sake of the saints, and lived a life of cultivation and study at the foot of Zhongnan Mountain.

"If your heart doesn't move, you won't be lonely......"

Wu Xiongbo muttered this sentence and fell into thought.

Down the hill, a multi-million Volkswagen Phaeton braked to a halt.

Li Shanyu got out of the car, opened the trunk, took out a bag of herbs and went up the hillside.

Li Changqing happened to be carrying a few bags of leeks downhill, planning to go to Lijiaao Primary School.

The two met on the hillside, and they looked at each other with some surprise.

Li Shanyu came to send a batch of urgently needed medicinal materials to his old comrades-in-arms, and got to know the master of Chinese culture who was studying in Lijiaao Primary School.

When I was about to arrive at my destination, I met a fellow who sold peaches at a high price at the entrance of the fruit wholesale market.

Li Changqing didn't expect to meet the CEO of Jinzhu Pharmaceutical in the ravine in the poor countryside at his doorstep.

"Fellow, we are really fateful, and we met by accident!"

Li Shanyu only knew Li Changqing's name, but did not know the specific information.

"This is my house on the slope, do you want to go up and drink a bowl of water?"

Li Changqing has Li Shanyu's personal business card, but he has never been in touch.

"It's fun to have friends from afar, so you want me to drink a bowl of water?", Li Shanyu said.

"The friendship of gentlemen is as light as water!", Li Changqing said.

"Okay, let's go drink a bowl of water!", Li Shanyu said.

"Lao Li, are all the herbs ready?", Wu Xiongbo said eagerly when he saw Li Shanyu.

"It's all here, and there's a lot of one!"

Li Shanyu patted the package of medicinal herbs and said to Wu Xiongbo.

"Thank you, wait for Qingwa to pour you two bowls of water!"

Wu Xiongbo heard the conversation between the two and teased.

"How can two bowls be enough, come to three bowls!", Li Shanyu didn't care and smiled.

"Lao Li is here!", Liu Yulian came out to greet her.

"Have you taken the panacea, your complexion is better than before!"

Li Shanyu visited Liu Yulian in the provincial capital and said in surprise.

"Hehe, it's all the credit of Qingwa!", Liu Yulian said with a smile.

"There is no way in the city or province, but the fellow is so captured, it's really hidden!"

Li Shanyu knew the hardships of Wu Xiongbo taking Liu Yulian to seek medical treatment, and became more and more curious about Li Changqing.

"Haha, Lao Li, don't you want to know the master of Chinese culture in Li Jiaao?"

Wu Xiongbo remembered his shock at the beginning and said to Li Shanyu.

"Could it be that Li Jiaao's master of Chinese culture is also a fellow countryman, right?"

Li Shanyu looked at Wu Xiongbo's expression and guessed.

"Remove it, Li Jiaao's master of Chinese culture is also a green baby!"

Wu Xiongbo saw Li Shanyu's shocked face, and said with satisfaction.

"What a strange man in the mountains!"

Li Shanyu was prepared in her heart, but Ren Ran sighed in surprise.

"After reading a few books of sages and reading a few medical classics, there is nothing worthy of praise. ”

Li Changqing was not modest, but the true thoughts in his heart, and his face was calm and authentic.

"Yes, strange people don't rely on false fame!", Li Shanyu nodded understandingly.

"You talk first, I have to go to Lijiaao Primary School to lead the children to study!", Li Changqing smiled helplessly.

"Let's go, let's go!"

Li Shanyu and Wu Xiongbo have heard the legend of the book in the deep mountains for a long time, and they are very interested.

In Lijiaao Primary School, Li Changqing's reading has become a cultural feast.

And Li Changqing reads spontaneously, does whatever he wants, and is not limited to form, and his voice is very infectious.

"The leaves are pale, and the white dew is frost. The so-called Iraqi people are on the water side. ”

"Tracing back to it, the road is long and obstructive. Tracing from it, it is like being in the middle of the water. ”

"Guan Guan Ju Dove, in the river island. My Fair Lady, Gentleman. ”

"Jagged wattles, flowing left and right. My Fair Lady, I covet it. ”