Zheng Hao walked quickly towards the tallest building in the novice village.

"Library? Is this a place to sell books? Zheng Hao looked at the four-story bookstore that was incompatible with the entire novice village, and was a little surprised.

"When you enter the library, you are not allowed to make loud noises!" The owner of the bookstore was holding a thread-bound ancient book in his hand, his eyes were fixed on the pages, and after Zheng Hao appeared, he didn't raise his head.

Zheng Hao replied and walked into the library, which was very spacious, with soft and bright light, and the bookshelves made of logs emitted a leisurely fragrance, but there were not many books on the shelves.

Zheng Hao came to a bookshelf marked with chemistry with curiosity and pulled out a book from the shelf.

"High school chemistry knowledge, you can directly implant it into memory after purchase, price: 1 silver coin." The prompt sound of the system sounded in Zheng Hao's mind.

He frowned, in the Colosseum map, he was rewarded by the Earth Space for his strong combat ability, and he had already gained all the knowledge of all subjects in high school.

"I didn't expect that the knowledge of high school can only be obtained in the Colosseum, but can also be purchased in the library, and it seems that the price is not high, it seems that they have to communicate with the royal road, so that they don't have to spend it in the Colosseum." Zheng Hao thought about it for a while and wanted to open the book to check, but found that the book was like one and couldn't be opened at all.

"Books can only be opened after they are purchased, and they are directly implanted into memories after opening, and after they are implanted in memories, the books disappear immediately." Listening to the prompt in his head, Zheng Hao reluctantly put the book back on the shelf.

I walked around the first floor casually and came to the staircase, "These knowledge on the first floor are all the knowledge of elementary school, junior high school, and high school, and it doesn't work for me at all, go up to the second floor and take a look." ”

"College physics? Human anatomy? Biomechanics? Statistics? College Math? Introduction to Bioengineering? Chinese Medicine Extraction Technology? After taking a turn on the second floor, Zheng Hao found that the disciplines on the second floor were all studied by universities and graduate students, and his heart suddenly became hot.

Among them, biomechanics, college mathematics and traditional Chinese medicine extraction are even more coveted by Zheng Hao, he can win all battles in the Colosseum, because he used the knowledge of high school physics, mathematics, and biology to calculate the most effective, deadliest and most labor-saving attack method, which is like a magic cheat, allowing him to play extraordinarily and defeat people who are stronger than him.

Now after seeing college physics, biomechanics, college mathematics, as well as bioenergetics and human anatomy, he sees hope for upgrading cheats!

"Each book costs 10 credits! You can put 100 silver coins in the Chinese medicine extraction technology first, but the other five doors must be obtained in the recent period, that is to say, in the recent period, I must earn 50 silver coins! Zheng Hao began to enter the space, got the implantation of knowledge, and only thought about how to improve his grades in reality.

After more than a month of space travel, his thoughts now are different from those at that time, and now he just wants to arm himself with this knowledge, so that his shots will be more deadly, and his shots will be faster and less laborious.

"The second floor is the knowledge of universities and graduate students, so I want to see what the knowledge is on the third floor." Not to mention silver coins, even copper coins Zheng Hao didn't have, he coveted these five knowledge, and he could only look at it dryly, there was no way.

Walking up to the third floor, the layout of the upper floor is not much different from the first and second floors, the only difference is that there are very few books on this floor, only about a dozen.

"The manufacturing process of aerospace special metals, the design drawings of the space shuttle engine, the design artwork of the infinite space shuttle......" Looking at the names of these books, Zheng Hao's eyes almost widened.

"Is this thing real?" Zheng Hao couldn't believe that every kind of knowledge here could be regarded as black technology for any country on the earth.

If someone is willing to sell it, every piece of knowledge can be sold for hundreds of billions of dollars.

"Crazy, really crazy, the knowledge of the space shuttle is there, is this the rhythm that wants to bring the earth into the interstellar age?" Zheng Hao, who has obtained spatial inheritance knowledge, has no doubt about the authenticity of this knowledge.

"If the state sees this knowledge, it will definitely go crazy, and even if it costs more, it will get it." Zheng Hao took a deep look at these books and walked up to the fourth floor.

When he got these books, he had already been reminded that he had to have knowledge consigned on the third floor to be eligible to buy knowledge on the third floor.

People who are not qualified to buy will not even be able to see the price of this knowledge.

"Outer space operation technology, alien mining technology, planetary traction technology......" took a whole circle on the fourth floor, and found that it was all alien mining-related technology, he couldn't buy it, he could only see the name of the knowledge, and the introduction couldn't be known, let alone the sales price of these technologies, and he suddenly lost interest and walked to the first floor of the library in frustration.

"Hello, uncle." Zheng Hao came to the bookstore owner and said hello respectfully, the earth space looks a bit like a virtual game, but Zheng Hao doesn't dare to treat this place as a game, even if it is an NPC, he treats it like a real person in reality.

"What's the matter with you?" The bookstore owner's eyes remained unchanged, staring at the books in his hand firmly.

"Uncle, I saw that the books in the library all need copper coins, or even silver coins to study, I want to ask you, how to get copper coins and silver coins? What is the difference between copper and silver coins, can you tell me? Zheng Hao asked respectfully.

"Copper and silver coins are the common currencies in the novice village, 1 silver coin is equal to 1000 copper coins, the way to obtain it is very simple, you can sell knowledge that does not exist in the library, you can also go hunting in the wild, sell the meat of wild beasts to restaurants, you can sell furs to grocery stores, you can also go to mining and sell to blacksmiths, you can go to pick useful herbs and sell them to the hospital."

"Okay, don't bother me reading, what you want to know, I've already answered." Just when Zheng Hao wanted to ask, the bookstore owner raised his head and glanced at Zheng Hao with a cold look.

Zheng Hao only felt as if he was being stared at by a bloodthirsty giant beast, his heart was furious, his body was cold, his forehead was full of cold sweat, and he suppressed the fear in his heart, he quickly spoke, "Uncle, I just want to ask, how to sell knowledge?" ”

"Oh." The owner of the library glanced at Zheng Hao in surprise and pointed to a shelf in the library, "Put your hand on it, the library will search for your soul, and valuable knowledge will be displayed in front of your eyes, you can choose to sell it or choose to refuse." ”

After saying this, the bookstore owner lowered his head again and indulged in the book.

Zheng Hao said thank you softly, walked to the shelf, pressed his hand, and in an instant, two pieces of information appeared in front of him.

High School Science Fighting Arts, sale price: 1 credit.

High School Science Physical Exercise, sale price: 2 credits.

Seeing this price, the corners of Zheng Hao's mouth twitched, these two fighting techniques and physical training techniques developed by him are the basis for him to maintain strong combat effectiveness, I thought that he could sell at least a hundred silver coins, but he didn't expect to add up to only 3 silver coins.

"The old ones don't go, the new ones don't come, they sell!" Gritting his teeth, Zheng Hao clicked to sell.

"Congratulations to the player for opening the Earth Space Currency System."

"Hello players, you can get 10% of the profit you get from selling your knowledge in the future."

The prompt sound is extremely short, but after hearing the second prompt, Zheng Hao's face finally looks a lot better, the sale of knowledge is not a one-time thing, as long as a player buys the knowledge he sells, he will continue to gain benefits.