The footsteps on the thick dust left clear footprints, and the old wooden ladder made a low gurgling sound, making people worry about whether it would collapse under heavy pressure.

But fortunately, nothing happened to the accident, and Shen Shi followed the wooden ladder all the way up to the second floor of this small library building.

As I felt when looking down, the second floor of the small building was very dim, and Shen Shi, who was standing at the top of the stairs, opened his eyes and could only vaguely see that the area of the second floor seemed to be smaller than the first floor, and at the same time, there were several dark shadows standing there in the dim shadows, and the shape seemed to be very similar to those bookshelves on the first floor.

It should also be a place to hide books, Shen Shi thought so in his heart, groped to find a window next to him, and hurriedly opened it first, and suddenly a burst of bright light and fresh breeze rushed over, making him squint his eyes slightly, take a deep breath, and then turn back to observe this place again.

Sure enough, it was similar to the first floor, but on the second floor of this small building, only two bookshelves were placed, and there was nothing else. And there are not many books on the shelves, and at a glance, at most about one-third of the places are placed, which is much worse than the appearance of the downstairs being full.

"Huh?" Shen Shi was a little curious, walked to the bookshelf, first swept the old dust with his hand, and then took a few books at random and flipped through them.

After a cursory look at a few books, Shen Shi found that the scrolls here seemed to be not much different from those scrolls on the first floor in terms of content, most of them were when the books were collected in the past, the bookshelves on the first floor were full, and the rest were directly received on the second floor, not that the scrolls on the second floor were more precious than the first floor.

With this discovery, Shen Shi's curiosity faded a lot, but since the books were all about the same, there was not much difference between reading on the first floor and reading on the second floor, so Shen Shi didn't bother to go downstairs at the moment, so he stood in front of the two bookshelves on the second floor and slowly flipped through the scrolls. If it really aroused interest, he directly stuffed it into his arms, which was reserved for a closer look at later.

A breeze blew into the small building from the window, with a refreshing coolness, and time passed imperceptibly between the lines. Shen Shi's gaze lingered on these scrolls, and for some reason he suddenly felt as if he had returned to the time when he was a teenager studying in the first floor of the sky, and now all this seemed to have become like an unreal dream......

For a moment, there was a slight confusion in his heart, but soon he finally woke up from that inexplicable emotion, smiled self-deprecatingly, gently closed the page in his hand, put it on the bookshelf casually, closed his eyes and was quiet for a moment, and then continued to walk behind the bookshelf.

I don't know which of the predecessors of the Black Phoenix Demon Clan was the one who established this small library building and collected so many scrolls, but at least for now, Shen Shi doesn't seem to have found any good books in these scrolls that particularly aroused his interest, and in general, the books and classics collected in the small building are often strange, history, humanities, geography, stories, legends, admonitions, etc., almost all of them, but they are not classified, giving people a very chaotic feeling.

Perhaps, the predecessor of the Black Phoenix Demon Clan back then was just to be a vassal of elegance? Shen Shi had such a disrespectful thought in his heart, when he chatted with the old white monkey before, he had also heard the old monkey demon say that although the vast majority of ordinary demon clans now did not read books, but in the days of the Heavenly Demon King Court in the past, collecting books was an extremely elegant and popular thing among those high-level demon clans who were rich and powerful. Now there are also some demon clans who admire and reminisce about the glorious era of the Heavenly Demon King Court in the past, and there are also some who collect books and classics as collections.

It's just that if you really like to collect books, how can you not take good care of these books and classify them, I think most of them are still not very reliable.

Shen Shi pursed his lips, his fingers lightly swiped over the cover pages of the books on the bookshelf, paused occasionally, took out a book and looked through it for a while, then put it back on the bookshelf and continued to look for books. After reading the two rows of shelves unconsciously, I didn't feel that there were any particularly precious good books, only the lowest shelf of the last bookshelf remained.

There are not many books here, it seems that there are only a dozen of them, and when no one turns them, these books look like they are all placed in a mess, and the pages of the book cover look very shabby.

Shen Shi squatted down, didn't hold out much hope, just casually flipped through the scrolls as just now.

Read one, lose one, read one, lose another, sure enough, it's mostly boring and useless miscellaneous books, and I don't know how it was included back then, presumably the vision of the Black Phoenix Demon Clan who collected the book was not very good.

In a short time, he almost finished reading the scrolls on the bottom row of bookshelves, shook his head, and was about to stand up, when Shen Shi suddenly stared at the corner of his eye, but he saw a piece of torn paper that seemed to be thrown at random at the end of the bookshelf, with some faint handwriting on it. Even most of the handwriting was blocked, and only one or two words could be faintly seen, and some of them were vaguely blurred, as if they were a few words similar to "yin and yang."

Shen Shi paused, shook his head and didn't think much about it, and didn't bother to look at the dirty paper again, so he got up and walked towards the stairs, preparing to go to the first floor to find the old white monkey.

The sound of low footsteps echoed a few times on the wooden staircase, and the creaking sound echoed, but after a while, it suddenly stopped again, and then the footsteps sounded again, but it was Shen Shi who turned around and walked over again for some reason, squatted down in front of the bookshelf just now, and then picked up the broken paper.

With a strong shake, the dust flew instantly, like time precipitating countless times on this scroll, and finally turned into countless fine dust. Through the dust, Shen Shi took the book to the light, only to see a few lines of handwriting on the ancient and worn paper:

Yin and Yang, the way of heaven and earth, the outline of all things, the parents of change, the origin of life and death, and the house of the gods. (Note 1).

Yin and Yang ......

Is the way of yin and yang?

Shen Shi silently stared at the broken paper in his hand, stared coldly at the handwriting on it, and looked at this difficult and mysterious passage, and the light in his eyes gradually brightened.

He thought quietly for a long time, and then began to examine the torn piece of paper, turning it over and over again, but there seemed to be no trace of it other than the text on the paper.

Shen Shi slowly frowned, hesitated for a while, and suddenly ignored the dirt on the ground, and lay directly at the bottom of the dusty bookshelf, carefully searching every inch there.

Inch by inch, inch after inch, the ancient bookshelf slipped silently between the cracks of his fingertips, the dust fell silently, and when he occasionally tapped on a point, the bookshelf would make a low muffled sound, until at some corner the echo suddenly became thicker.

Shen Shi's gesture was paused, and he gently and repeatedly knocked a few times, after making sure that the corner of this bookshelf was different, his eyes became brighter and brighter, and he did not hesitate, and directly began to dismantle the wooden frame, after several times of tinkering, the heavy wooden frame was finally dismantled by him A crack, and then, Shen Shi saw the inside of a wooden beam there, and at some point a deep circular trench was dug out, and a black scroll was lying there quietly.

Shen Shi's heartbeat suddenly became intense, and even the sound of breathing became a little shorter, and he grabbed the black scroll that had been hidden in the dust and had been forgotten by endless years, turned it upside down, and looked at the bottom of the scroll.

Beneath the shadows, in the depths of black, a faint touch of gold flickered.

It was a lifelike flower, as if it would never fade through time—

Seven-leaved golden sunflower.

※※※

At the door of the small building, the little black pig's ears shook and seemed to suddenly appear a little irritable.

It looked around, and there was no one on the left and near of the small building, not even a single figure, let alone any unusual sound, but at about the same time, somewhere in the distance of this mansion, there was a sudden commotion and noise, vaguely as if something amazing had happened.

But something so far away, for this little black pig who eats and sleeps, there is no interest at all, at this time, it turned around the door of the small building a few times, feeling that it was hungry.

There didn't seem to be anything to eat around, and the little black pig shook his head helplessly, stayed where he was, and thought for a while, and finally turned around and walked towards the small building.

The pig's trotters left another clear footprint in the dust on the ground, and the little black pig soon saw that the old monkey demon was standing by a bookshelf, holding a book and looking intently, as if he had not noticed himself at all.

Anyway, this old immortal usually doesn't give himself anything to eat, the little black pig snorted a few times in his mouth, ignored the old white monkey, turned around and looked for it, didn't see Shen Shi's shadow, but saw the stairs in front of him, and the footprints on the stairs.

Xiao Hei ran over, took three steps and made two steps up to the second floor, although the dust here seemed to be heavier than the first floor, which made the little black pig feel a little uncomfortable, but it quickly saw Shen Shi, and immediately became happy, and hurriedly leaned over and rubbed at Shen Shi's feet.

It's just that Shen Shi's appearance seems to be a little strange at this time, holding a black scroll with a strange style in his hand, looking over and over again and pondering, he didn't even notice that the little black pig ran to his side. However, under the perseverance of the little black pig, Shen Shi finally came back to his senses and glanced at the little black pig.

The little black pig met the master's gaze and snorted twice, and the short and curled little pig's tail shook a few times, revealing a little flattering.

Shen Shi has been with Xiao Hei for three years, and he has long known the habits of Xiao Hei Pig, and he can see at a glance that this guy is hungry again, and he came to ask him for something to eat. If he would tease and play with Xiao Hei on weekdays, but at this time, all his thoughts were on the black scroll, and he was really in no mood to pay attention to the little black pig, so he casually reached out to his waist and took off the food sack, and threw it directly to the little black pig.

On weekdays, he would prepare some food for Xiao Hei, put it in a sack and hang it around his waist, and at the same time, because the little Ruyi ring that brought him to the demon world had long been damaged, so some of the important items that were close to him were also packed in some cloth bags, including those witch runes made on weekdays, which were also additionally packed in cloth bags, so there were several bags hanging on the belt, but the food bag was a sack, which was easy to recognize.

The little black pig saw Shen Shi throw over a bag, and immediately became excited, over the years it has long been accustomed to Shen Shi's feeding, happily grabbed the cloth bag, just wanted to use its nose to arch the mouth of the bag to eat, but looked at the surrounding unpleasant dirty dust, the little black pig actually showed a little disgust, picked up the cloth bag, and jumped down the stairs with a smoke, ran out of the small building directly, and returned to the stone steps outside the small building at first, and then put down the cloth bag.

Hehe, today's bag seems to be bigger than usual, it looks like you can have a full meal!

Xiao Hei thought to himself, and then arched the mouth of the bag with his nose.

In the faint sound of saliva, for some reason there was no smell of its favorite meat, but a moment later, under the stunned gaze of Xiao Hei's surprised pig eyes, a warm and smooth bead with a blue, yellow, and purple light rolled out, turned twice in front of it, and then seemed to roll down the stone steps.

Xiao Hei stretched out the pig's trotters and took the strange bead back, but its two eyes stared at the bead, and the light flickered, but it was a little dazed for a while.

(Note 1: Uttering out of "Su Wen: Yin and Yang should be like the Great Treatise").