Approaching the bookshelves, the first thing that catches your nose is the smell of metallic mercury.

Although ordinary people can't smell it, Wu Zhe can. The evolutionary organism's mind immediately feeds back the molecular formula of mercury and its use in preserving books.

How harmful it is to use mercury to help preserve books. The corners of Wu Zhe's mouth twitched. But it is undeniable that mercury is more effective in keeping books intact than a book of insect-repellent Chinese herbal medicines. Moreover, it does not affect the original color of the book, and can enhance the solidity of the fragile pages.

But the biggest drawback is that it will trick people. Mercury poisoning is second to none. Wu Zhe can smell the volatilization of mercury in the air, but he doesn't know how many people will be poisoned here.

By the way, that elephant can't be poisoned like this, right?

The spy report mentioned that the elephant was always bald and did not even have a beard, as if he was a fat monk. According to the data, mercury poisoning can lead to hair loss.

However, considering that the Moon Rank Saints all have strong physiques, it is possible to reach at least the Elephant Elder who has touched the Xuanyue Rank. His body should be strong enough to resist the corrosion of mercury.

Wu Zhe pondered in his heart, and his hand slowly touched the books on the shelf.

The reason why she slowed down was because she was still cautious. Don't have any mechanism on the shelf, right?

This is considered the prudence of a good undercover agent.

However, this is already a place after the defense, how can there be any harmful organs? Wu Zhe took down a copy of "Six Veins Walking Technique" from the bookshelf.

This is a kind of light work, a bit like the Ling Bo microstep in the description of the novel. However, the concept is completely different, just a trick that turns ordinary steps into graceful movements, and implies all kinds of variations.

Wu Zhe looked at it a few times and confirmed that the grade was no longer worth showing for his current self. The grade of this book is about the level of infusing Xuan Qi at the door.

After flipping through a few more books, Wu Zhe saw something interesting.

Each book has one or two ways to be used and added. Changed a little bit.

Alterations are often accompanied by words such as "ridiculous" and "naïve".

However, the changes in the move exercises are a cut above the grade in the book. At the very least, the original shortcomings can be greatly compensated.

Wu Zhe thought about it, could it be that this was added by some master who took care of books?

Using the observation power of the evolutionary organism, Wu Zhe can basically judge that the traces of the addition of pen and ink are about the past few years. The dictionary is the handwriting of ten years ago, and it was also put into storage at that time.

Combined with the fact that these fonts are all in the same person's handwriting, it can be inferred that there is at least a seventy or eighty percent chance. These later additions and changes are written as if they were the old.

Wu Zhe put the book back in place and walked around the room again.

Her steps that had been floating changed to be heavy. Because with the help of the evolutionary body's keen perception and calculation ability, she could know whether there was a hidden passage under the bricks by the echo of the bluestone bricks.

Wu Zhe is used to reading all kinds of mystery novels, and always feels that there will definitely be some hidden passages in this kind of place.

Finding nothing, Wu Zhe walked out of the second heaven book hall.

The door closed behind Wu Zhe, and the door lock that had absorbed the Xuan Qi seemed to have gradually lost its open state, and naturally closed.

Ascending the stairs again, to the third, fourth, fifth, sixth, and seventh heavens, all of them are the same.

Wu Zhe poured the door lock Xuan Qi at the door of the book hall. The gate can be opened. The books inside are improving step by step.

However, with each heavy heaven that goes up step by step, the attached "heavy heaven" stone monument has become higher and higher. By the seventh heaven, it was already a Qi people-high hint stone tablet.

When it comes to the seventh heaven, the edge of the stone steps of the seventh heaven is purple. The books in the book hall are already moon-level sage-level martial arts techniques.

Wu Zhe stood in the book hall of the seventh heaven, and with a sharp sweep of his eyes, he could see that the classics of the Demon Sound Valley were among them.

This sect that has been made by Wu Zhe to fall in the valley, and the poor martial arts classics are left here.

Wu Zhe didn't look at it at first. Instead, I flipped through the books in the neighborhood and finally read them in a hurry.

Although she had already used her Xuan Qi to detect and scan her surroundings vigilantly. Make sure no one is peeping. But Xiang Lao has not appeared, so it is better to be cautious not to expose a little horse's feet.

With a casual flip, Wu Zhe's knowledge of the Demon Sound Valley had already come into his mind. The magic sound technique that was already known was more abundant.

The previous basic exercises, although they can't compete with the characteristics of the Demon Sound Valley level, are still very good.

Wu Zhe glanced around and engraved the names of all the exercises into his mind. He went out of the temple with his hands behind his back.

When I climbed the stairs again, I saw a stone monument standing next to the road.

This stele is quite conspicuous, and it is engraved with the words: [You can't read it up, and you have no regrets. 】

Wu Zhe thought for a moment.

Could it be that after reaching the eighth heaven, you can't look at the exercises of the seventh heaven and below?

Wu Zhe thought about it. With his hands behind his back, he turned around and re-entered the seventh heavenly hall.

If anyone sees it, they will be absolutely surprised.

And this kind of people who give up in the face of temptation, run back and pick up the old things again?

Of course, Wu Zhe is actually out of the thief's mind. Since I have been to the Seventh Heaven, the exercises here are actually very good. It's better to learn more here yourself.

In other words, as an ordinary martial artist, his energy is limited, and his cultivation talent and mind are also limited, so it is natural to consider more powerful and powerful exercises first. Nine times out of ten, people will go up to the eighth or even the ninth heaven before they choose the exercises that suit them.

But Wu Zhe's evolutionary body had no such concerns at all. Her ability to learn is close to infinity.

Ordinary exercises can be learned quickly in a short period of time, even if they are large exercises such as Freedom Divine Skill or Yuan Qi, you only need to format it internally and re-establish a virtual operating system.

Of course, the consequences are something that Wu Zhe is unwilling to accept, but this is a minor problem.

For a whole day, Wu Zhe was reading.

When it was dark and needed to light the candle, she walked out of the seventh heaven's study hall.

There are two stacks of bamboo cage lunch boxes on the side of the stone steps, among which there are meals warmed by hot water in porcelain pots.

When the little eunuch came over just now, Wu Zhe had a sense, but he was too lazy to come out.

Now when he looks at things, Wu Zhe understands that such a meticulous mind must be taken care of by General Manager Peng.

After eating, Wu Zhe thought about it for a while, and then stepped up the stairs again.

The edges of the stepping stones along the way are already white, beyond the previous colors of red, orange, yellow, green, blue, and purple.

Soon there will be a stone tablet more than a foot high, engraved with black words: [Eighth Heaven]! (To be continued......