After wearing it back, I took my father to chase after my mother

Chapter 201 Rules
Although there is no hint on the inner wall of the wardrobe, the innermost cabinet against the wall feels much thinner than the other cabinets.

Generally speaking, in order to save materials, the wood of the innermost cabinet is very thin.

This is in line with common sense.

Qin Yuanyao bent her fingers and tapped on the cabinet again.

When knocking on the innermost cabinet, the sound sounds much empty, not as heavy and solid as knocking on other cabinets.

Qin Yuanyao was wondering when she suddenly heard Chi Baiyi's voice.

"Come and see, is this the direction the girl's left hand is pointing?"

Qin Yuanyao and Chi Cheese didn't find any useful clues in the cabinet. Hearing what Chi Baiyi said, their attention was drawn away.

Qin Yuanyao went to Chi Baiyi's side, and measured the direction the girl's left hand was pointing with her eyes. It was indeed on the bookshelf.

"Is she referring to some book?" Qin Yuanyao asked suspiciously.

Using the same method, she kept drawing a straight line of nothingness with her finger along the direction the girl's left hand was pointing.

Finally, her straight-line fingers touched the book "The Female Commandments".

Qin Yuanyao looked surprised and confused: "Is she referring to this book?"

Chi Baiyi's eyes were deep: "Look first."

The book is still brand new, with no markings, no traces or marks of having been seen by anyone else.

Qin Yuanyao flipped through the book from beginning to end, but did not find any clues.

"There is no clue." Qin Yuanyao said to Chi Baiyi: "Could she be referring to other books?"

"Read all the books nearby." Chi Baiyi said.

Qin Yuanyao and Chi Baiyi took out all the books around "The Commandments of Women" and flipped through them.

Chi Cheese helped them flip together.

Nine or ten books have been read from beginning to end by them, but there is still no clue.

"Could she be referring to the bookshelf behind?" Qin Yuanyao thought again.

"We went through the books on both bookshelves before, but we didn't find any clues." Chi Baiyi said.

"Is it possible that we didn't read carefully enough and missed something?" Qin Yuanyao asked.

Since the girl's finger was pointing in this direction, it was probably on purpose.

Qin Yuanyao could only think that it might be because they didn't search carefully enough and missed something, so they didn't find any clues.

Chi Baiyi understood what Qin Yuanyao was thinking.

He nodded: "Let's go through it again."

They followed the direction the girl was pointing at first, flipping through the books on the back shelf, and after finding nothing, they expanded the range.

In the end, they basically re-read all the books on the two bookshelves.

【too difficult!too difficult!Seeing Yaoyao and the others turn so many books from beginning to end, I feel very difficult]

[Are the clues really in these books?Could they have found the wrong place?】

【Oh, who knows.Before the password is unlocked, nothing can be missed, there may be clues】

[I see that the other four groups of guests did not solve it smoothly]

[The program team made a big move this time.I don’t want them to come out easily, deliberately delay their time】

"There is no clue..." Qin Yuanyao sat on the bench a little tiredly.

Chi Cheese nodded his little furry head, his face was solemn: "Yes, it's so difficult!"

Chi Baiyi re-examined the painting and the calendar again.

"The painting and the calendar should be reminders, especially the four strings of numbers..." Chi Baiyi mused, "What does the direction the girl is pointing have to do with the calendar and the numbers?"

Qin Yuanyao also looked at the paintings and calendars.

"The girl pointed to the closet with one hand, and there was nothing in the closet. The other hand pointed to the bookcase, that is, these books... What do those four strings of numbers have to do with books?"

Chi Baiyi followed her words and said, "The structure of the four strings of numbers is the same, and the first four numbers are also the same. Is there any pattern?"

Chi Cheese rested his cheeks in his soft little hands, and also had a sad face.

She said like an adult: "What rules will there be?"

All three were silent.

Chi Cheese felt that if her parents couldn't figure it out, then she, a child, couldn't figure it out even more.

She was tired from resting her chin, put down her hands, and was about to sit upright when her eyes flicked over the books on the table.

There is a book that is face up.

Chi Cheese glanced over the string of numbers in the lower right corner of the book, and she was stunned.

She stared at the string of numbers several times, then slid down from the chair, ran to the wall calendar, looked at the four strings of numbers on the wall calendar, and silently compared them in her heart.

After the comparison, Chi Cheese shouted happily: "Sister Qin! Dad! These four strings of numbers are similar to the numbers on the back of the book!"

Both Qin Yuanyao and Chi Baiyi were taken aback.

They took the book closest to them and turned to the back of it.

Sure enough, in the lower right corner of the book, there is a string of numbers.

Qin Yuanyao compared the numbers on the back of the book with the four strings of numbers on the calendar, and immediately understood.

"Book number! The number in front is the book number!"

【What? ?What is ISBN? ? 】

[When the editor of this book saw the four strings of numbers, he felt that the strangely familiar (covering his face) was really a book number (covering his face)]

[For the popular science of the sisters in front, the book number is the book number assigned by the General Administration to each publishing house. If you want to publish a book, the book number is essential. If you don't have it, you are not allowed to sell it at a price.The book number is usually on the back of the book, it is the string of numbers and barcode]

[I picked up a book and looked at it, it really is the book number! 】

[If you didn't work in the publishing business, you definitely wouldn't have thought that it was an ISBN.The cheese is amazing! 】

[Yeah, although I like to buy books, I don’t go to see what the book number is.Cheese's observation skills are really awesome! 】

“978-7-3356-1345-3，一直到这都是书号，后面的数字还不知道是什么。”秦苑瑶道。

Chi Baiyi was also reminded by Chi Cheese, and had already realized that the number strings were preceded by the book number.

"Let's find out the corresponding four books according to the book number."

"Okay!" Qin Yuanyao and Chi Cheese both responded.

They worked together in a division of labor, and quickly found out the books corresponding to the four ISBNs.

"But, what's the number after the ISBN?" Chi Cheese asked cutely, tilting his head.

Chi Baiyi and Qin Yuanyao were thinking about each other, but neither of them spoke.

【come on! Come on!The book number has been guessed, and the book has been found, so it must be very close to the answer! 】

[The numbers in the back should be related to the corresponding books, right? 】

[I think it's probably related, otherwise why make them bother to guess the book number]

[The guests in the other groups have no idea yet, but Mr. Feng and his family are a little ahead, feeling that they are getting closer to the password.Yaoyao and the others are almost seeing the light of day! 】

Chi Baiyi's eyes flashed, and he suddenly had an idea.

(End of this chapter)