"Bo Yuan, although this building is good, but ......" Liu Bei took Liu Yi, Pang Tong, Guan Yu and others to inspect the houses for the last time, looking at the five-story residential buildings in front of him, Liu Bei suddenly thought of a question, looked at Liu Yi and said: "The people want to make fires to make food, and draw water, how to solve this?" ”

It is also Liu Bei who slowly got started, lived a hard life, and knew that the people's life was not easy, if it was their mansion, then there would be no problem, and manpower could complete it, but you still expect ordinary people to have a special person at home to carry water for you, and how to make a fire at home? Didn't see the chimney either.

"Do you know what the water tower is for?" Liu Yi pointed to the water tower in the distance, which was four or five feet high, and said with a smile.

"Water tower?" Liu Bei looked at the past suspiciously, in the entire Xiangyang City, there were more than 30 such water towers, and Liu Bei always thought that it was a warehouse.

"Recently an interesting discovery, the water in the water tower is introduced into the house with a bamboo pipe, and then a sluice gate is installed, when using water, as long as the building is not higher than the water tower, the water in the water tower will automatically flow over, the specific principle is related to the weight of the water, and at most it can only play more than four zhang, no matter how high, it will not be reached, among these residential buildings, each is a three-bedroom and a living room layout, there is a special kitchen room and thatched toilet, and the filth can be directly washed away through the drainage system, through the bottom sewer, directly into the manure tank outside the city, It is intended to make fertilizer to irrigate farmland. ”

It is naturally impossible to compare with modern times, but the principle of the flush toilet is not difficult, and it does not require much craftsmanship to make, and it is squatting, just flush it directly, but if the toilet happens to have no odor elimination attributes, then there is no way.

After so many years, Liu Yi is no less than the level of the previous life in the use of water, of course, there is no such thing as a high-pressure pump, and the current level can not be done, but with the pressure of the water itself to make a water tower, it is no problem to drain and irrigate into the water tower from outside the city. So Liu Yi explained in more detail.

"In fact, this kind of usage is used in Yueyang City and fishing villages, and the bath is used in this method, but it is not a water tower, and Yueyang does not have such a tall private building."

Yueyang's dwellings are at most two-story small households, and there is no need to build a water tower, just build a toilet or something on the first floor.

Rao is like this, Liu Bei was also a little amazed, and said with a little joke: "The people in Xiangyang City are blessed, I'm afraid that even the hard-working nobles in the court are not so convenient." ”

"These things are recorded in detail in the heavenly creations, and if anyone is willing to study them carefully, it is not difficult to design and build such a city." Liu Yi said with a smile, now the technology has been perfected in theory, the practical aspect of cement these raw materials are available, the crane has also been made, read through and understand, and people who have some basic experience in this line can almost make it, but the city built is not the attribute bonus of the city built by Liu Yi, and the speed cannot be compared with Liu Yi, after all, ordinary people do not have Liu Yi's ability to turn so many people into craftsmen with good skills.

"Heavenly creation? Already a book? Liu Bei nodded when he heard this, he knew that Liu Yi had been constantly improving this book since many years ago, when he was in Shuzhong, he fought every day, Liu Yi would bury his head in writing as long as he had time, even when he was supervising the construction project, Liu Yi would carry a blank bamboo slip with him or write directly on paper, but he never saw Liu Yi finish it, so Liu Bei didn't know what the specific progress was.

"Hmm." Liu Yi thought about it, felt that this was a good opportunity to advertise, and took out a book from his arms, not the kind of bamboo slips, but a printed version made of paper.

Liu Yi handed the book to Liu Bei and said: "It's just the first edition, and it may be revised in the future. ”

Liu Bei didn't refuse, just looked at the book with some curiosity, about the paper book, long before the Battle of Chibi, Liu Yi had mentioned it to Liu Bei, but Liu Bei and Zhuge Liang always felt that the time was not right, and they didn't agree but didn't refuse, but Liu Yi obviously didn't stop, and the book in front of him was a finished book, which made Liu Bei a little curious.

The paper is not the kind of Caihou paper that I have seen before, that kind of paper is not conducive to printing, and it is not convenient to divide it, it is easy to stick together, this kind of paper is Liu Yi after many experiments and polishing, and it is similar to the big white paper of later generations, the surface is very light, each one is also very thick, and it is easy to turn the page.

Open the book, compared to the words on the bamboo slips, the words recorded in the book are much more smiling, the words the size of the thumb, generally a few pages can be on the top of the roll of bamboo slips.

The first volume is all recorded with some mathematical operations, Liu Bei also knows that Liu Yi has come up with a set of symbols to replace numbers, but he hasn't studied it much, as for the symbols of addition, subtraction, multiplication and division, he doesn't understand it, and what belongs to the basic course in Yuxiang Academy looks like a book from heaven when he is in front of Liu Bei at this moment.

After a long time, Liu Bei rubbed his eyes, looked at Liu Bei with a wry smile and said, "Bo Yuan's book...... I can't read it. ”

Pang Tong took it curiously and looked at it carefully, he had discussed it with Liu Yi, especially Guan Yu's numbers and symbols, Pang Tong got it with Liu Yi, and after looking at it for a while, he said in confusion: "It's not difficult to understand, it's all the basic algorithms of some mathematics." ”

Liu Bei's face was a little embarrassed, the air became a little quiet, Liu Yi held his forehead speechlessly, and said with a smile: "It's not that the lord doesn't understand, it's just that the lord doesn't know the meaning of these number symbols and operation symbols, so it's hard to understand, lord, in fact, these symbols Yi has some other ideas." ”

Liu Bei took the opportunity to divert the topic: "Oh? Bo Yuan said? ”

"Before these numbers were popularized, they could be used for intelligence transmission, and the details we sent to the Central Plains or Jiangdong could use this symbol to transmit information."

Liu Yi took out a book of Analects from his bosom and explained: "For example, only 365 is written in the intelligence, which is the third page, the sixth line and the fifth character, so that even if the information we passed on was intercepted by the enemy, they would not know what we were trying to say." ”

After a long time, it will definitely be cracked, after all, as a detailed work to receive intelligence, you must know the meaning of this thing, but Liu Yi took out the Arabic numerals, which was not for the purpose of intelligence.

Liu Bei's eyes lit up when he heard this, if this was placed a few years ago, it would definitely not be used, just such a big place, what to do with all these bells and whistles, but now, Liu Bei, as the second most powerful prince today, has a large territory, and has passed the most difficult period of entrepreneurship, and now Liu Bei has begun to gradually formalize his forces and complete some functional institutions that he does not have.

Now Zhuge Liang in Shuzhong, in addition to helping Liu Bei govern the rear, the most thing he has done is to set a set of laws suitable for the current situation and the internal situation of Liu Bei's group in accordance with the Han law, and this kind of thing is intelligence, Liu Bei didn't care much about it before, but now, Liu Bei also wants to follow Cao Cao's example, establish a special intelligence agency, and find out the news of all parties.

"Bo Yuan, how many books are you carrying in your arms?" Pang Tong looked at Liu Yi's chest with some curiosity, although this book is not as bulky as a bamboo slip, and the content that can be recorded in a book is far more than a bamboo slip, but it is not a thin piece of paper.

"Just these two." Liu Yi said: "Tiangong Kaiwu is from easy to difficult, a total of nine volumes, in the fishing village academy, corresponding to different students, how can I bring all nine volumes with me?" ”

"It's just this one, and there are ten thousand words, right?" Liu Bei fumbled with the exquisite book and asked with a smile.

"Pretty much." Liu Yi nodded, he hadn't calculated, how could he know so much.

"How much does it cost?" Pang Tong asked coldly.

Liu Yi thought for a while and said, "Such a book, if it is sold, it will cost about three hundred yuan." ”

As for the cost, it is really not expensive, more than a dozen dollars are up to the sky, because it is mass production, so in fact, the manual cost plus the material cost is not much, but it can not be sold too cheaply, after all, this year and month knowledge is a very deep and serious thing, take it out to do business will have people feel that it is tarnishing knowledge, defiling the sages, if it is sold too cheaply, then I am afraid that no one in the world will agree, this is not just anyone can buy?

In fact, in these years, if you really want to sell books, don't care how much it costs, when you sell them, you just call them expensive, and there will be no counteroffer, three hundred yuan, Liu Yi estimates that some people will jump out and be dissatisfied.

"Is it too cheap?" Pang Tong frowned and looked at Liu Yi, not only him, Liu Bei, Guan Yu and others also felt that this price was too cheap, I didn't see Guan Yu holding a spring and autumn book all his life, that treasure was not much worse than the red rabbit horse.

"I think so, the price is such a price, but it is only sold internally, those who contribute to the country can buy, generals in the army can buy, and the limited amount, in addition, libraries can be set up in various cities, so that some people who have the heart to learn can read, but can not take away, in addition, if some people can come to vote, they can also give books away!" Liu Yi thought about it and said, you can't promote it directly, you have to take your time, giving books this year is a very tall gift, and it also has style.

"In this way, we can indeed recruit a lot of talents for the main public!" When Pang Tong heard this, his eyes lit up, and he nodded with a smile.

Liu Bei looked at Liu Yi when he heard the words and said, "I don't know how many books of ten thousand words Bo Yuan has in his hands now?" ”

Liu Yi: "That's enough." ”

Liu Bei: "......"