Lin Yu's expression couldn't help but change when he heard this, and his expression couldn't help but be a little puzzled.

Li Zhensheng and the others were also suspicious, and looked at the small box in Lin Yu's hand curiously, quite suspicious, feeling that Yan Kun was really too capable of boasting, even if it was just exaggerated, it was not exaggerated to this extent!

What can be contained in such a small box?

It's worth thousands of troops, and even if it's stuffed with something as powerful as a nuclear weapon, the damage is just as limited!

"Senpai, this is ......"

Lin Yu asked with some hesitation.

"Just open it and see for yourself!"

The big bald man didn't explain much, and motioned to Lin Yu to open the box by himself, and the smile in his eyes was quite meaningful.

Lin Yu flipped over and looked at the small box, and found that the small box was made of ebony wood and had exquisite workmanship, but what was surprising was that there was no opening in this small box, and even the entire box did not have any cracks or gaps that could be opened!

In other words, the whole box looks like a whole at all!

Lin Yu was a little surprised when he saw this, and couldn't help but glance up at Yan Kun, seeing Yan Kun with a smile on his face, he seemed to understand that this was Yan Kun's deliberate test of himself.

Li Zhensheng, Hu Qingfeng and the others were also confused after seeing the wooden box clearly, and turned their heads to Yan Kun in confusion and asked, "This box doesn't even have a place to open, how can it be opened?!"

"If Mr. He can't even open this box, then I'm afraid he won't be qualified to ask for the contents of this box!"

Yan Kun raised his head and said with a smile.

Lin Yu couldn't help but shake his head and smile, took a closer look at the wooden box, and found that the wooden box did not have any gaps, nor did it have any protrusions, and if you wanted to open it, there was no way to start.

"Sir, it's very easy to open it, I'll come!"

Bu Cheng said in a cold voice, then took out a dagger from his body, and then said to Li Zhensheng, "Lao Li, go find me a hammer!"

Obviously, he wanted to pry the wooden box open.

Yan Kun was speechless for a moment, and hurriedly said to Lin Yu, "He boy, let me tell you, if you smash or smash it, you will destroy it, and this box has been circulated for hundreds of years, do you really want it to be destroyed in your hands?!"

Although he didn't have the power to care what way Lin Yu opened the box, he didn't want to see Bu Cheng open the box in such a rude way.

"How can I be willing to break such a delicately made box!"

Lin Yu shook his head with a smile, waved his hand at Chong Bucheng, and said, "Since this box can be opened, and there are no gaps or protrusions on the surface, it means that it uses a very clever mortise and tenon technique, and it may require special techniques to open!"

Yan Kun smiled and said nothing, still looking at Lin Yu with a deep face, without the slightest intention of helping, let alone judging whether what Lin Yu said was true or false.

Li Zhensheng and the others glanced at each other when they heard this, and they all knew that the mortise and tenon joint technique mentioned by Lin Yu was the main structural method of ancient wooden buildings, furniture and other instruments, because the protruding part was called tenon, and the concave part was called tenon, so it was called mortise and tenon structure.

The best thing about mortise and tenon construction is that it can be connected without nails.

Although mortise and tenon structures are often used for traps, most of them have places where they can trigger traps, such as grooves or bumps, but the box looks so smooth and sturdy that there is nothing to trigger at all, so it can't be opened at all!

However, Lin Yu was very patient and sat on the chair next to him with the box, looked around the box carefully, and then gently shook it in his ear, and found that there was not much abnormal noise, which showed that the space in the box was not very large.

He held the box with his left palm, pressed the top of the box with his right palm, and then slowly increased the force with both hands, sensing the changes inside the box, but he found that there was no loose sound in the box at all, if he really used force, he might directly smash the box.

He quickly retracted his strength and observed the box again, this time more carefully than before.

Yan Kun's face was full of smiles and a complacent look when he saw this scene, and said to Lin Yu, "He boy, you don't have to worry, this box is passed down from my master, and my master is passed down from his master, from generation to generation, when my master unlocked this box, it took thirty-nine days, and my senior brother untied it for forty-six days, so you don't have to worry, just solve it slowly, anyway, the things inside won't need it for a while, you can unlock it in two months, it's already very good!"

This is something that has been passed down from generation to generation in their sect, and after hundreds of years, how can it be said that it will be unraveled?

"Uncle Shi, what's in it?!"

Qiu was full of doubts and said, "Since it was given to Brother He, why don't you help him untie it?!"

"That's right, Uncle Shi, Brother He is not a person in our sect, we give things to others, and we have to test others, isn't it not good!"

Chunsheng also scratched his head, and then said, he knew that he, the senior uncle, liked to play tricks on people the most, and he was obviously deliberately embarrassing Lin Yu here, and now Lin Yu has too many things to consider, and it is not worth it at all to waste too much energy on one box!

"That's not what I meant!"

Yan Kun said with a smile, "It's what your master meant, your master said, give him two months to let him untie this box, if he can't untie it, I'll go back and ask your master when the time comes!"

"Go back and ask the teacher?!"

Chunsheng and Qiuman were stunned for a moment, and asked in unison with some surprise, "Don't you know how to open this box?!"

Yan Kun's face suddenly changed slightly when he heard this, he coughed, and said, "This thing has always been in your master's hands, and I haven't touched it much, how can I unravel it?!"

As he spoke, he raised his head and said disdainfully, "Of course, if that old guy is willing to hand over this box to me, within ten days, I will definitely untie it for him!"

He was actually bragging, he used to ask his senior brother to take this box for some time, but he didn't open the box after tossing for half a year......

After all, he didn't dare to use brute force, nor did he dare to use some radical methods to crack this box, after all, it was a centuries-old thing, and if it was not tossed well, it would be easy to toss and fall apart.

So he said that he would let Lin Yu untie it within two months, but in fact, he was already looking down on Lin Yu.

"You haven't opened the box either?!"

Lin Yu glanced at Yan Kun with some surprise, and then smiled, "Give me two hours, before you get on the plane, I will definitely let you see how this box is opened!"