"Is this the formation of the Library Hall?" Wang Kai also asked Ning Yuchan at the light film in front of him.

"Young Master Wang Kai, you guessed it right. This is indeed a formation to protect our Seven Treasures Glazed Glazed Sect Book Collection Hall. Have you seen this light film? Although it does not have the ability to attack, if it does not carry the corresponding identity token and pass the light film rashly, the corresponding mechanism will trigger it, locking the intruder between the two stairs of the Book Collection Hall. At the same time, it will also warn the elders guarding outside, informing someone that they had entered the Book Collection Hall."

"So that's it!" Looking at the light film in front of you, Wang Kai nodded as if he had gained something, and then said to Ning Yuchan.

"Mr. Wang Kai, my identity jade plaque level is not enough, and I am not qualified to enter the fifth and sixth floors of the Book Hall. However, I know that the fifth floor of the Book Hall stores the cultivation experience of the Soul Confus and the title Douluo strong man, while the sixth floor of the Book Hall stores the skills of our Seven Treasures Glazed Lith Sect. I will wait for the young master on the fourth floor of the Book Hall." While shook his head with some regret, Ning Yuchan explained to Wang Kai the fifth and sixth floors of the Book Hall.

"Then I'll bother you, Chan'er, I'll go back." After saying that, Wang Kai gently stroked the light pink hair on Ning Yuchan's forehead.

"Well, young master, don't worry, Yu Chan will wait patiently on the fourth floor. Young master, don't worry, Yu Chan will be anxious or angry!" Accompanied by Ning Yu Chan's quiet voice, Wang Kai immediately stepped into the light film and walked into the fifth floor of the Book Hall.

Compared with the fourth floor of the Book Hall, the fifth floor of the Book Hall is undoubtedly smaller, with only about a thousand books. Of course, considering the rarity of Soul Continent and Titled Douluo on Douluo Continent, the practice experience and understanding of the laws of more than one thousand Soul Conrad is actually very precious.

Naturally, every classic on the fifth floor of this book cave is extremely precious. Any one can be sold at a high price of hundreds of thousands or even millions of gold soul coins. The cultivation insights of a strong man above the Conqueror are a precious wealth that the Tiandou Empire cannot produce, and it is enough to show the powerful foundation of the Seven Treasures Glazed Glazed Sect. Ning Fengzhi was able to give Wang Kai the authority to read these classics, which undoubtedly reflects his importance to Wang Kai.

Compared with the fourth floor classics, the treasured protection measures on the fifth floor of these book halls are naturally more complete. Each classic is placed in a special compartment, and there is also a layer of light film to protect it outside each compartment.

According to Ning Yuchan, Wang Kai placed the jade token on a stone platform next to a partition. Suddenly, the jade token in Wang Kai's hand glowed slightly, and then the light film of the corresponding partition of the stone platform slowly dissipated.

After taking out the classics in the compartment, Wang Kai felt his hand sinking slightly.

On the fifth floor of the Library Hall, all the classics are written on a special material called "Iron Paper". They are made of pulp from thousand-year-old iron wood with special craftsmanship. Each sheet of iron paper weighs a hundred times that of ordinary paper, and the price is more than one thousand gold soul coins.

Of course, correspondingly, iron paper is also one of the few special materials in Douluo Continent that can carry the practice laws that the titled Douluo and the titled Douluo strongman have realized. Not only that, it also has the magical characteristics of immortality for thousands of years. It is precisely because of these two characteristics that the Seven Treasures Glazed Tile Sect uses it to preserve the authentic works of these Soul Douluo and the titled Douluo.
Chapter completed!