Late at night, Ouyang and Su Qingqing quietly sneaked into the library of Yuzhou University.

He escaped from Yuzhou Prison, so Ouyang could not be exposed to the sun, so he could only secretly return to the campus at night.

Since Ouyang and Su Qingqing are both familiar with the environment of Yuzhou University, they are naturally familiar with the road.

The library of Yuzhou University is divided into five floors, but the lower two floors are filled with humanities and history books, so there are not many students who come to read the books, because the students of Yuzhou University are only interested in mathematics and science books.

Although no one cares about it, there are a lot of humanities and history books in the library, there are tens of thousands of books, and the entire ground floor is full of dense bookshelves......

Su Buxuan once said that on the ground floor of the library, a door could be found, so Ouyang and Su Qingqing searched here.

With the strength of two people, it will naturally take a lot of work to find clues from the library of Nuoda, and the two of them are sneaking in, and they may be discovered at any time, so they must be careful.

Even if she was in danger, Su Qingqing didn't feel afraid, because she was with Ouyang, and she didn't have that feeling of fear in her heart.

The two searched the ground floor of the library for a while, but found nothing.

Su Qingqing looked at the time and said, "Ouyang, it's not too early, we've been in the library for two hours, if we don't leave, I'm afraid that someone will find out." ”

Ouyang shook his head: "Qingqing, I won't give up!" Duan Ling'er and they are still in prison, if they don't find the truth, they will be wronged forever! What's more, something unspeakable seems to be happening on this campus, and the culprit must be found! ”

Su Qingqing persuaded: "Ouyang, although there are only humanities and history books here, it's not that no one has come in!" Those students who come in to read the book have not found anything for so many years, and what can we find in a short period of time? ”

Ouyang's attitude was still resolute: "Qingqing, no matter what you say, I won't go back." ”

“……”

Su Qingqing was helpless, and could only rely on Ouyang's temperament.

When Ouyang was serious, he looked particularly attractive, and Su Qingqing couldn't help but look stupid......

He is a few years older than Ouyang, but he is far less mature and stable than Ouyang, no matter what happens, Ouyang will not panic, giving people an indescribable sense of security.

The two continued to search on the ground floor of the library, and Ouyang looked at the books on the shelves and seemed to have found something......

"Many of the books here are not read, so the books are covered with dust, but some of the books are very clean, and it seems that there are a lot of people looking at them, but I don't understand why so many people read books like "Huaxia Dictionary" and "Principles of Philosophy"?"

When Su Qingqing heard this, he suddenly realized: "Ouyang, what do you mean is that these obscure but well-read books are likely to be clues!" ”

"Yes!" Ouyang nodded, "Let's find out this kind of book!" ”

"Good!"

Su Qingqing responded and said just do it.

After a while, the two of them found all the books on the ground floor of the library that were obscure but had been read a lot, and dozens of them were placed on the ground.

Ouyang said again: "Qingqing, there must be something wrong with these books, let's put them back on the bookshelf in a permutation and combination!" ”

"Ouyang, dozens of books, if they are all put up in a way that is arranged and combined, I am afraid that it will take a long time."

Su Qingqing was a little worried, but Ouyang did not flinch.

"It's okay, what's the point of spending a little more time in order to know the truth?"

Ouyang said heavily, and then took the books and tried them one by one.

According to the principle of permutation and combination, it takes quite a long time to put dozens of books on the shelves in different ways, and if you are not a person with strong perseverance, I am afraid that you will not be able to persevere.

What's more, even if you try all the permutations and combinations, you may not be able to find clues......

But Ouyang was unyielding, experimenting again and again, and every time he tried, he eliminated this method and replaced it with another way.

Time passed minute by minute, and after a while, two hours passed.

It was early in the morning, Su Qingqing was a little tired, and her eyelids were almost unable to lift......

But Ouyang was in good spirits, and he didn't show any signs of fatigue!

Just as Ouyang was trying the 454th method, there was a sudden noise on the ground floor of the library!

"What sound?" Su Qingqing was startled, and when she looked again, a hole suddenly opened on the wall beside her! "Sure enough, as the second brother said, there is a door here!"

Ouyang nodded: "Yes, if you enter this secret passage, you may be able to know something." ”

Su Qingqing said eagerly: "Then what are we waiting for here?" Get on board! ”

"......" But Ouyang didn't talk, he glanced at Su Qingqing silently. Qingqing, I'll go in alone, and you'll wait outside for me to come back. ”

"What are you kidding?" Su Qingqing immediately refused, "Ouyang, are you Su Qingqing a person who is greedy for life and afraid of death?" Even if there are many dangers inside, as long as the two of us work together, we are not afraid of any difficulties, are we? ”

Ouyang continued to shake his head: "Qingqing, if we both go in, if something happens inside, I'm afraid that we won't be able to take care of it, so you better stay outside." ”

"What do you mean?" Su Qingqing was anxious, "Ouyang, in your mind, what am I Su Qingqing?" Why do you have to do such a dangerous thing alone? ”

"Qingqing, you are the most important person in my Ouyang."

Ouyang said silently, hearing this sentence, Su Qingqing's face was red.

Could it be that Ouyang also likes himself? Just as you like him?

My longing is not unrequited love!

In front of the secret passage on the first floor of the library, Su Qingqing froze alone, her heart was full of all kinds of thoughts, and she even forgot what to do......

"Boom!"

Su Qingqing was thinking about it, but Ouyang's hand knocked on her neck.

Because he was defenseless, Su Qingqing was knocked unconscious by Ouyang at once......

"Qingqing, I'm sorry." Ouyang said apologetically, and carefully put Su Qingqing on the ground and lay down, "At most, you will be able to wake up in half an hour, and at that time, I will almost be able to know what will happen in this secret passage!" ”

With that, Ouyang went into the secret passage without looking back......