Li Yan, Tang Shishi, and Tang Xiu and Tang Lan were sitting at the stone table in the courtyard, Li Yan was flipping there with a book in his hand, and Tang Shishi and Tang Xiu were all looking at Li Yan.

This book is a book that I went to Tang Liwen's room to pick up after eating. The book has no name. Why is there no name. Because the book has been torn up a little bit. Among them is the two-page cover of the book.

Li Yan flipped through there for a while, and Tang Xiu asked, "Brother Yan, have you flipped it?" It's been so long. Is there anything on it? ”

Hearing Tang Xiu's words, Li Yan said angrily: "What are you anxious about, this is only halfway through the turn, and you have to read every page." Also, if you're urging, you can rummage through it. ”

Hearing Li Yan say that he would let him go to find it, Tang Xiu immediately said with an embarrassed smile: "Hehe, isn't it dark." And a little, I'm afraid of chilling them out. Speaking of this, Tang Xiu pointed at Tang Shishi and they continued: "But since this is the case, Brother Yan, take your time, I believe that Sister Shishi will not be cold." ”

Tang Shishi and Tang Lanlai, the two daughters, heard Tang Xiu's excuse, why did they suddenly pull it on them, and they both glared at Tang Xiu. It means don't take us with you.

When Li Yan heard Tang Xiu's excuse, he shook his head speechlessly, and didn't say anything anymore. Continue this flipping through the book.

When a book was almost two-thirds of the way through, Li Yan glanced at it, and when he was about to turn the next page, a sentence at the bottom of this page caught Li Yan's attention.

Li Yanding looked at it, and then read it and said: "'The sages thought that Yi Yi Yin and Yang were combined into fifteen, which is the Tao. Yang becomes nine out of seven, yin changes into six out of eight, and it also joins in fifteen. If the number of changes is one, the yang moves forward, and it becomes nine of seven, like the breath of its qi; Yin moves and retreats, changing into six of eight, like the dissipation of its qi. Therefore, Taiyi takes its number, in order to line nine palaces, four positive and four dimensions, all of which are combined in fifteen, and is named the number of nine square grids. After the sages knotted their meanings, they got a mystery, and its mysteries were: the righteousness of the nine palaces, the law is based on the spirit turtle, and the four two are the shoulders,'" After reading this page, Li Yan was about to turn the next page, but found that the next page of this page was torn off, and he was suddenly shocked: "Huh? Why was the next page torn off? This is about to find out, and it turns out that there is a page missing. ”

Tang Shishi and Tang Xiu, the two brothers and sisters, were also shocked when they heard Li Yan's words, and immediately snatched the book to see if it was.

Tang Shishi took it over, looked at it and was shocked: "Really, this page has also been torn off," After speaking, he turned it roughly again, starting from this page, there are also some places behind that have been torn several pages.

Turning to this, Tang Shishi noticed the content of the book, and suddenly said, "Huh? Isn't this a book that my father brought back from the capital once? And there are a few copies along with this one that have been torn apart. ”

"Wait. The book I bought back from the capital is not a book from ten years ago. I know the books from 10 years ago. Speaking of this, Tang Shishi seemed to think of something, looked at Tang Xiu and said: "This book was originally torn by Tang Xiu, you kid, it means that how can there be books in the house that have been torn apart, it turns out to be this." ”

Tang Xiu, who was about to take it over to the side, heard Tang Shishi's words, and said, "Sister Shishi, are you mistaken, why don't I remember that I have torn the book." ”

When Tang Shishi heard Tang Xiu's words, she smiled and said, "Really? Don't worry, do you want to go to your dad now and ask if it's this book, if so, do you think my dad will let you copy the book? "But the smile is kind of like I'm going to see a good show.

Tang Xiu heard Tang Shishi say that she was going to her father to confirm that it was not me at first, and immediately withered, and said, "I suddenly remembered, it seems that there is such a thing, please." Maybe I didn't remember it just now. However, when he said this, I don't know if he really remembered it or not, anyway, I don't know about it.

Li Yan, Tang Shishi, and Tang Lan saw Tang Xiu's appearance and heard what he said, as if they didn't hear it. The most speechless person is Tang Lan, if this is outside, if Tang Xiu is like this, she will not hesitate to say to outsiders: "I don't know this person, I don't know who his surname is." ”

But speechless is speechless, but it is still done, seeing that this is a critical moment, it must be a little anxious, and the level asked: "What should I do?" If you don't have the following, it's not easy to find out. ”

When Tang Shishi heard Tang Lan's words, she shook her head and said, "Don't ask me, I don't know, just wait for tomorrow if you can't do it, we don't have this at all." ”

"Nope." When Li Yan heard Tang Shishi's words, he shook his head and said: "Although the next part of the book is gone, it still gives us some hints, such as 'four and two are shoulders,' which is a good hint, so we have to use this as a basis to reason next." ”

After speaking, Li Yan picked up the bamboo branch and painted on the sand, first copied Xu Bai's inscription, and then said: "Didn't it say that four and two are shoulders, then we will write four and two, but where is this nine palaces for the shoulder, then it is." Speaking of this, Li Yan pointed to the nine-square grid and said: "The meaning of this is obviously that the first line of one or three squares is the shoulder. After speaking, Li Yan wrote the words four or two on it.

After that, he said, "The next step is to try them one by one." And what we have obtained before is used. But we still have to start with these four and two as the starting point, so that the number and the sum of four and two equals fifteen. ”

"First of all, one is impossible, and three is impossible." Li Yan pointed and said, "Then let's come here, starting from nine, then add two and four and nine, eh?" Oh, these three numbers add up to exactly fifteen. Then write it down. After speaking, Li Yan wrote. In the middle of the four and two is written the word Jiu.

Li Yan spoke very seriously there, Tang Shishi, Tang Xiu, and Tang Lan, the two brothers and sisters, looked at Li Yan and listened to Li Yan seriously, but the expressions of the three were a little weird.

Li Yan didn't notice the eyes and strange expressions of the three of them, but continued to talk about what he understood.

"Now that the first line has been derived, then it's time for the next step. But when this line is done, we can come up with the next step, you see. He pointed to the nine-square grid and said, "The nine and five just now are added together, and there is one number left." So let's put together the numbers. ”

"Just now we started with the largest number, and then we can't start with the largest number this time, because nine plus five is equal to fourteen, so you can only add one. That's exactly fifteen. Since it came out, it was written on it. ”； Speaking of this, Li Yan wrote 'one' in the corresponding column.

At this point, Li Yan glanced at it, and thought that it would take a lot of effort to do it next, but he actually found that the three numbers in the oblique column could be added, and with this discovery, Li Yan said: "This has already come out half, and we will continue the rest." ”

Speaking of this, Li Yan pointed to the palace grid on the sand table and said: "You see, the sum of the three numbers in such an oblique column can also be equal to fifteen, since it can, and there are already two numbers, then there is only one number left." Then let's follow the above. ”

Li Yan spoke very seriously, but after all, everyone came together to find a way, but now it has become Li Yan performing alone, but even if it is only like this, Tang Shishi and others don't say anything, the only thing is to listen carefully to Li Yan's explanation and the logic analyzed.

Not far away, someone who had planned to send some snacks didn't come over when he saw the situation here, but just listened to Li Yan's explanation quietly, nodding from time to time, with a little relieved smile on his face.