The white marks on the turtle shell in front of him are in contact with each other, and the whole forms a complete simple pattern, which makes the young man thoughtful and bright.

"This turtle shell is also a sign of fragmentation, but the lines on it can be combined to form a complete pattern, so will the surface on this mysterious iron box be similar to it?"

"Perhaps, I should change my thinking, not to get entangled, not to look for the pattern in the lines, but to try to rearrange them, put them together, and put the iron lines together into a complete figure, which may be the real way to unlock the iron box!"

The new way of thinking made the young man's heart excited, and he felt like his mouth was suddenly opened.

Thinking of this, the young man who couldn't wait to try it hurriedly finished his breakfast, and then directly took the sturdy iron box beside him.

Pang Yuan kept moving the iron unit, his eyes were fixed on the lines above, looking for the connection points between the lines, and from time to time he used his fingers to draw lines on the land, experimenting with various combinations, and then implementing them on the surface of the iron box.

With a clear line of thought, the boy was no longer confused, and his cracking speed was greatly accelerated.

With the flexible movement of the iron units between Pang Yuan's fingers, the changes between the lines became more and more clear, and under the movements of the young man, the thick and thin lines connected, and most of the simple and complex words gradually emerged.

Pang Yuan saw that the results were slowly appearing and everything was about to be completed, and he was overjoyed, and he also accelerated the cracking speed in his hands.

Finally, the square iron block on the tin box was moved, and the thick and thin lines on it finally formed a slightly unfamiliar and ancient text!

"Wu!"

Pang Yuan frowned, his eyes were fixed on the final result, and he spit out a word with some hesitation.

The text in front of him is clumsy and thick, and the boy can recognize that it is actually very similar to the structure of today's Wu Yizi, but it is more complicated, and its age seems to be older.

"Click~Click~"

Before the words fell, with the formation of the ancient clumsy characters, the inside of the iron box seemed to have undergone a wonderful change, and the sound of the iron mechanism turning and rubbing the parts made alarmed the boy.

"What's going on!"

Pang Yuan took a step back and stared nervously at the iron box in front of him, worried that if something happened and destroy the items in the iron box, it would be a big loss.

The changes in the inside of the tin box continued.

With the sound of the moving parts of the mechanism inside, the surface of the animal head relief of the iron box was dented together, and then one side of the iron box was completely separated from it.

The mystery box is now opened!

Seeing that the sturdy iron box was not only not damaged but successfully opened automatically, Pang Yuan first breathed a sigh of relief, and then his heart was ecstatic.

After the tin box was fully opened, there was no movement, and after waiting for a while, seeing that there was no accident, the young man cautiously stepped forward to check the long-awaited harvest.

Saw.

In the middle of the tin box, a thin secret book lies quietly inside, underneath it is padded with a fine soft flannel, dry and thick, and it is tightly surrounded to prevent damage to the pages.

Pang Yuan was excited in his heart, and subconsciously stretched out his hand to pick up the secret book inside, and his fingertips trembled slightly because of excitement.

The mysterious book was very thin in the hand, very light, not thick, and it didn't look like a few pages.

Originally, in the eyes of the boy, this secret book should be some years old, but the paper still feels delicate and tough to the touch, and there is no sign of yellowing in the color, neat and new.

Pang Yuan carefully held the secret book in his hand, and when he raised his eyes, the three square and simple bold characters on it were arranged from top to bottom, deeply engraved on the surface of the secret book.

"Jushi Gong!"

"Is this the name of this book?"

The young man's heart was excited, and he gently opened the secret book, and the pages inside were all kinds of human meridian diagrams and tempering methods, as well as some ways to carry qi and blood, which made the young man who saw it for the first time a little confused.

"Huh, there's text here!"

Pang Yuan frowned slightly, silently flipped through the secret book, and on the last page, the young man found that there were still a few lines of square small characters written.

To the boy's delight, these small characters were also recognizable from the three clumsy characters at the beginning, no different from the characters he had learned.

Pang Yuan read it carefully, and it turned out that the small words on the last page were annotations to the contents of the secret book in the box:

"Boulder Gong, refining the body exercises, both internal and external, can greatly improve the strength of the body, weaken the pain, greatly improve the practitioner's body defense and resistance to blows, and the exercises can be cultivated into a body protection stone armor, almost supernatural. ”

"Could it be that this is the martial arts inheritance that Uncle Lin said before?! Haha, it's developed. ”

When Pang Yuan saw the effect of this exercise, he squeezed the secret book tightly, his breathing was a little short, and he read it excitedly.

"The exercises are divided into three layers, and the difficulty of cultivation at each level increases several times, so ordinary people can get started, if they can persist diligently and practice hard, they can be successful in twenty years!"

"How many?!Twenty years?!"

"Am I mistaken?"

Pang Yuan exclaimed in disbelief, at first he thought he had seen it wrong, rubbed his eyes, and looked again.

However, the line was clearly laid out there, and twenty years were clearly written on paper, without a single error.

When the boy saw the practice time written on it, he was a little dizzy for a while, shook his head, and couldn't help but reach out and rub his temples, trying to soothe his nerves.

"This is for me to practice until the Year of the Monkey!"

"It's too pitiful, with this time, I don't know how much stronger than it is just by using the free attribute to improve my physical fitness!"