The servants in the other courtyard were no less than those in the ancestral home, but the masters did not come often, and they were less cautious in fear. Although they did not run around between the first and second gates, they were commonplace to leave their posts without permission.

Cheng Jinzhou still walked in through the small door and left Shiyan outside waiting for the food sent by the Huo family. The third yard had two of his own small yards in the other yard, and the servant was also from the third yard. In addition to rushing to the old house to report, he would arrange it properly.

The room outside the main hall was not very light. Cheng Jinzhou stretched his waist so tired that he shook his head in his heart. His body was so sick that he felt tired even when he was in a car and fell asleep in a daze.

When he woke up again, Shi Mo was already standing beside him, first instructing the maid to prepare the washing items, and then whispered: "San brother, the young lady sent someone to ask, what are you buying the food for?"

"Who said it?" The purchase of food must be hidden. Cheng Jinzhou had expected that with his 12-year-old age and identity, no matter what he did, his subordinates would report it to their parents for knowing. However, they could not let them dare to report it casually...

Shimo's eyes drifted and said, "Shiyan and I know the rules and dare not talk nonsense outside."

They are the book boys from Cheng Jinzhou, and the second-class monthly routine also comes from here. They will definitely look to the little master first, but they dare not offend other servants easily.

Cheng Jinzhou snorted and said, "The master who drove the car?"

Shimo shook his head lightly.

"The shopkeeper of the Huo family?"

Shimo still shook his head.

Cheng Jinzhou was a little angry. He was not a good-tempered person. Even after polishing in school for so long, he was still a standard second-generation ancestor. At this moment, he slapped the edge of the bed and said angrily: "Say!"

Shimo was not serving the sick girl. When he heard the sound of hitting the edge of the bed, he knelt down and said quickly: "It was the government report from the other courtyard to the young lady."

A boy of fourteen or fifteen years old, kneeling in front of Cheng Jinzhou. The guy only praised the evil old society in his heart, and then said carelessly: "Which door?"

The clan administration is the supervisor of the clans, and Cheng Jinzhou doesn’t understand.

The two book boys could not explain, Shi Yan knelt down and said, "It's Gao Shiliu of the gatekeeper. When he saw that we came to the villa, he reported it first."

Cheng Jinzhou said "happy" and said, "Get up, I will tell me about such a thing in the future."

"Yes." Shimo and Shimo were not familiar with the original sickly Cheng. They were kneaded by the black-bellied Cheng Jinzhou for a few times and then became obedient.

Cheng Jinzhou didn't continue talking about this topic anymore, snapped his fingers gently, and asked again: "Have all the food been sent?"

"Everything was delivered, 40 stones of rice, 40 stones of grain, and 10 stones of sorghum. In the end, one or two or three cents of silver were left." Shimo said in a regular manner.

At this time, the maid also sent a regular copper basin, a towel made of long wool thread, a thin, small silk square scarf, and a palm-sized soap, and said, "San Ge'er, the second butler said, you can make an empty room in the warehouse in the backyard, so that you can pile up grain."

Dr. Cheng smiled at his face and said, "Yes, thank the butler for me, I'll send the things over now. Get up too."

The next sentence is about Shimo Shiyan.

After washing his hands and faces casually, Cheng Jinzhou did not use soaps that smelled very well. The soaps of this era were very complicated, including more than a dozen raw materials including angelica, white aconite, pig teeth soap horns, camphor, almonds, bean powder, etc. The effect of these things is fine. What Cheng Jinzhou couldn't stand most is that most of the soaps are filled with finely ground lead powder, and the quality of the soap is largely reflected in the amount of lead powder. So since the girl said it once, he no longer used it.

"Go out." Cheng Jinzhou pulled a scarf to wipe his face. After the three of them left, he pressed his fingers on the ring again, thinking desperately: Customer Service 010, Customer Service 010...

"Have you made up enough money?" The customer service man said in a stiff tone.

Cheng Jinzhou looked up and looked at Shimo, and asked first: "Did you hear it?"

"What?" Shimo blinked.

"What can I see?" Cheng Jinzhou asked again.

Shimo shook his head carefully and said, "I didn't see anything special..."

Cheng Jinzhou felt relieved again and walked outward while whispering: "It's enough, it's here in 1 minute."

"When you arrive, press the button, the ring will automatically receive it. You can also set the number. Currently, your Star Covenant points are 1 and the level is 1. Only when you wait until level 3 can you have an independent trading platform." After the customer service 010 said that, he only left a big virtual button, and there was a white input number next to it, just like a search engine in later generations.

It was very unhappy to be ignored, and Cheng Jinzhou had no choice but to enter the 7.2 yuan setting first, and then he slowly walked to the warehouse in the backyard.

The 90-stone grain was about 4.5 cubic meters, and it was piled into a small warehouse, and the surrounding area was cleaned.

After waved his hand and let everyone leave, Cheng Jinzhou pressed the empty key.

The familiar confirmation and cancellation jumped out, and then a big selection box appeared, which not only included rice, wheat and sorghum, but also wood, bricks, tiles, silk and other things. They actually included everything within 10 meters around.

Cheng Jinzhou sighed quite emotionally. After traveling through time, he thought he had been inseparable from it since then.

After choosing wheat easily and skillfully, the wheat piles were reduced little by little, and it looked like about two or three minutes. The customer service 010's voice came again: "The transaction is successful, you can choose to read."

Cheng Jinzhou couldn't wait to look at the chest-high position and saw an 8-page book that looked like paper, surrounded by misty smoke. If others could see the content displayed on the ring, they would even think it was a speech.

"The original geometry..." There was a publisher and translator behind it. Cheng Jinzhou read it word by word, and his face gradually darkened.

He studied theoretical physics for 8 years. Although his grades were terrible, even if he copied the paper, he still needed to check the materials. According to the age, although geometry was originally quite suitable for the medieval level of the Daxia Dynasty, the contents in it were not what he needed now.

From a historical perspective, "The Origin of Geometry" has infinite significance, and it is not an exaggeration to say that it is the pioneering work of classical mathematics. It is the Origin of Geometry that establishes the most commonly used and hateful rigorous logical argumentation method that middle school students today use and hate most - because "propositions that have been proved", "the matters to be proved are correct", and there is also a very famous counter-proof method. Before Euclid, a gentleman with an IQ of 200 had never thought of it.

For the Chinese, the "Geometric Original" translated by Xu Guangqi also has an influence all the time. It is through the translation of "Geometric Original" that the most basic terms of geometry today are determined in Chinese: points, lines, straight lines, parallel lines, angles...

The translation of these basic terms is clever and clear, and it exudes a brilliant brilliance in itself.

This is a math bible!

However, Cheng Jinzhou did not need brilliant light. He wanted to make glass and mirrors, even if it was to make fire. Except for the proof process, the original content of geometry belongs to junior high school content. It has no guiding principle in the application that travelers need most - it can be made after two points and can only be a straight line; the line segment (finite straight line) can be extended infinitely;. With any point as the center of the circle and any length as the radius, it can be made into a circle; all right angles are equal;. A straight line in the same plane intersects two other straight lines. If the sum of the two inner angles on the same side of the straight line is less than 180°, then these two straight lines must intersect on this side after infinitely extending.

These five points are amazing in ancient Greece for thousands of years, but they have no value for the 21st century time traveler Dr. Cheng. Even if they are in the Daxia Dynasty, similar understandings are not new.

"What a pity for my money." Cheng Jinzhou shook his head gently and flipped open the original geometric form in front of him.

In the whole book, the most practical thing is to prove theorem based on five public settings. If the bad student Cheng Jinzhou is to do it, he may not be able to complete it. If he says that this book is not worth a few taels of silver, Cheng Jinzhou, who claims to be aware of the academic community, is not easy to speak.

"010, let's have another book." Cheng Jinzhou curled his lips.

"Do you want to delete this book?" The customer service answered quickly.

Cheng Jinzhou looked up in surprise and said, "Of course not."

The research on star arrays is mainly about astronomy, and the foundation of astronomy is naturally mathematics and physics. The Daxia Dynasty was far behind other countries in the research on star arrays. It is still no problem to sell such a very basic book for a few taels of silver for the royalties.

Customer Service 010 said indifferently: "Because of your Covenant level, your terminal can only maintain one book at the same time."

"No wonder that playboy collected so quickly." Cheng Jinzhou muttered.

Jiezi said without any mercy: "Are you sure you want to buy a new book?"

Cheng Jinzhou shook his head first and said, "At least I can copy it down."

"certainly."

Cheng Jinzhou walked out of the warehouse with a sad face. Others could not see the content displayed by the ring, which was not an advantage now.

...
Chapter completed!