After the jade box was opened, there was not the slightest fluctuation of aura, and there were one or twenty jade strips of different lengths neatly stacked inside, each of which had one or more grooves, and some patterns that looked very complex and mysterious were engraved on it.

Fang Yang frowned slightly, he tried to use the aura to probe those jade strips, but he didn't find anything, and the lines on the jade strips didn't react to the aura at all.

The jade slip left by the senior mentioned that this jade box was a test, but the specific test of which aspect of ability was not mentioned, and there was no hint at all. There are some plain-looking jade strips in this jade box, what does it mean?

What does it take to pass the guò test?

With questions in his head, Fang Yang took out these jade strips one by one and lined them up on the stone table. Counting carefully, there are a total of 24 jade bars, which have three specifications, large, medium and small, and the size and position of each specification are different, and Fang Yang is confused.

"Xiaohuo, can you see what this is for? The senior said in the jade slip that this was a test. Fang Yang couldn't help but ask.

Xiao Huo looked around those jade strips for a long time, stretched out his front paws and scratched his head, then shook his head and said:

"I don't understand at all! What did she want to test? Could it be a formation? ”

"If it's a formation, then I'll be blind," Fang Yang said with a wry smile......

Fang Yang's cultivation of the "Chaos Decision", as well as some small tips, small skills, and cognition of the cultivation realm, all came from Xuanyangzi. However, Xuanyangzi didn't dabble in the formation too much, so Fang Yang naturally didn't have any research on this aspect.

The senior said that if she could pass the guò test, she would get a big gift from her. The gifts she gave out casually in front of her had already made Fang Yang and Xiaohuo call themselves rich, and the so-called gifts must be even more amazing.

Therefore, Fang Yang also did not give up and picked up the jade strips one by one and watched them repeatedly, trying to find the mystery of them, and now these 24 jade strips are placed here, but he doesn't even know what the content of the test is.

Fang Yang was also depressed in his heart, and said in his heart that this senior would really be able to sell Guanzi......

At this moment, Gu Ruoxi said with some hesitation:

"Fang Yang, I'...... I look like I've seen these looks......"

"What?" Fang Yang raised his voice suddenly, looked at Gu Ruoxi fixedly, and then asked, "Have you seen it?" This...... How is this possible? ”

Gu Ruoxi herself was also a little unsure, she said:

"I can't say for sure, but it's very similar, what I see is made of wood, and there is no such intricate pattern on it, so ...... I don't know if it's the same thing......"

"It's okay, you can talk about it!" Fang Yang hurriedly said, "Anyway, we don't have a clue now......

"Hmm...... I hope it doesn't mislead you. Gu Ruoxi said, "This thing of mine is very similar to a kind of educational toy Luban lock that I played with when I was a child." ”

Educational toys? Fang Yang and Xiaohuo were both a little dumbfounded.

The test left by a dignified Xiuzhen predecessor turned out to be an educational toy? Fang Yang suddenly felt that this matter was a bit ridiculous......

Gu Ruoxi saw the appearance of the two guys, stomped his feet, and said coquettishly:

"I'm not sure! You're going to have to make me say it, and now that I've said it, you're looking like this again......"

"I'm sorry, I'm sorry......" Fang Yang hurriedly laughed, "Gu Ruoxi, can you tell me in detail what kind of Luban lock this is?" ”

"The Luban lock originated from the mortise and tenon structure pioneered in ancient Han architecture, which is to use the internal concave and convex parts to mesh, without any nails or ropes, it can be combined into a tightly fitting cube." Gu Ruoxi said, "Generally speaking, Luban locks are easy to disassemble and difficult to install. ”

"Mortise and tenon structure?" Fang Yang said to himself, looking thoughtfully at the 24 jade strips, the more he looked at them, the more he felt that these things were like the Luban locks that Gu Ruoxi said.

Xiaohuo couldn't help but ask:

"That'...... Is this thing difficult? ”

"There are many kinds of Luban locks, and the difficulty is big and small." Gu Ruoxi said, "This seems to be called twenty-four locks, I heard that the ancient Luban lock only has a structure of 6 and 12, and the 24 are actually derived by later generations according to the principle of mortise and tenon structure, which is quite difficult." ”

Gu Ruoxi's words were like a bolt of lightning, waking Fang Yang up.

Perhaps in the eyes of today's people, this Luban lock is just a puzzle toy, and later generations have developed a more difficult structure based on the wisdom of their predecessors.

But this senior doesn't know how many years ago the monk was, in her time, there must have been only the most primitive version of the Luban lock.

In other words, this senior is very likely to be a master of this way, and he invented these 24 locks completely by his own research and reasoning, which was very likely to be an unsolvable problem at that time, so she used this Luban lock as the subject of the test.

Fang Yang felt more and more that Gu Ruoxi's inference was very close to the truth.

Then, the question arises.

"Gu Ruoxi, you ...... Can you successfully assemble these twenty-four locks? Fang Yang asked eagerly.

Gu Ruoxi shook her head and said:

"The Luban lock in my house was bought for me by my father when I was in elementary school. When I bought it, it was put together, but I took it apart and never put it back together. There are a lot of tutorials on the Internet, but I don't think watching tutorials is any different from cheating, so I've been researching it myself. Later, when I got older, I lost interest in this thing and put it aside......"

Fang Yang and Xiaohuo suddenly felt a burst of disappointment. Xiaohuo couldn't help but say:

"Fang Yang, since there is a tutorial on the Internet, let's take these jade strips out, and then study them slowly!"

In this cave, there is naturally no signal on the mobile phone, and if you want to surf the Internet, you must go out and talk about it.

Fang Yang smiled bitterly and said:

"The seniors have already left a message saying that if there is no test of Tongguò, it is impossible for this thing to be taken out of the cave. And after we go out this time, we won't be able to enter the next time, even if it's through the guò waterhole. I don't know how she managed to do that, but presumably this senior is not a lie. ”

"This doesn't work, that doesn't work...... Are we really giving up? Xiaohuo said a little unwillingly.

Fang Yang frowned and pondered, he didn't dare to test those jade strips casually, because if he made a mistake, he didn't know if he would directly destroy these jade strips! The methods of cultivators are endless, and it is absolutely possible.

After a while, Fang Yang's eyes suddenly lit up and said:

"There's a way!"

Last time, Fang Yang looted a large number of arms and weapons in the warehouse of the Wild Wolf Organization, Fang Yang quickly cleared out a few ammunition boxes in the storage ring and took them out, and then took out the flying sword named Ruoshui.

Under the puzzled eyes of Xiaohuo and Gu Ruoxi, Fang Yang took the flying sword and began to disassemble these ammunition boxes, and then picked up the dismantled wood and sharpened it. Xiao Huo and Gu Ruoxi's eyes suddenly lit up, and they understood Fang Yang's intentions.

If the water cuts these woods like a hot knife cutting butter, it is not too easy! Soon, Fang Yang compared the size, specification and shape of the 24 jade strips and cut out the 24 identical wooden strips.

Then he put away his sword, cleaned up the sawdust, and said to Gu Ruoxi:

"Gu Ruoxi, only you have come into contact with the Luban lock now. You first reminisce about the memories and try to put them together with this wooden strip to see. ”

"Good!" Gu Ruoxi said, "But I didn't succeed back then, and now that it's been so long, I can't guarantee whether it can be done!" ”

"It's okay, you try it first, we can study it together!" Fang Yang said with a smile.

Gu Ruoxi nodded, reached out and picked up the wooden strip and began to try to splic.

The difficulty of these twenty-four locks is really very great, Gu Ruoxi just kept trying with the memory of more than ten years ago, but it was impossible to combine them at all, and tried several times in a row, but the entire structure was very loose, and it would fall apart when touched.

Gu Ruoxi said dejectedly:

"No! This one is too hard for me to spell out......"

However, after Fang Yang watched the whole process of Gu Ruoxi's splicing, he had a hint of inspiration, at least he would not have no concept of the splicing process of the Luban lock. Seeing that Gu Ruoxi had no choice but to give up, he reached out and brought those wooden strips in front of him, frowning slightly and began to splic.

Gu Ruoxi couldn't help but be speechless for a while when she saw that Fang Yang had also started to try. She knew that Fang Yang had never heard of Luban lock before, and today was the first contact, in Gu Ruoxi's opinion, the possibility of Fang Yang's success was infinitely close to 0 If the Luban lock could be cracked so easily, it would not be called Luban lock.

In fact, as Gu Ruoxi deduced, Fang Yang's many attempts were in vain, and he couldn't put them together at all.

However, Fang Yang was not depressed.

On the contrary, his expression became more and more excited. Because after doing it himself, he also felt the breadth and profundity of it, not to look at it as a small educational toy, but it contains many principles of physics and three-dimensional geometry, and it is not so easy to figure it out.

However, IQ is Fang Yang's strength.

Each failure gave Fang Yang a lot of inspiration, he tried again and again, and the movements in his hands became faster and faster, because he had deduced the correct splicing method of the previous steps.

At first, Gu Ruoxi was a little unimpressed, but the more she looked at it, the more surprised she became. She had played with this twenty-four-lock structure when she was a child, so she could see that Fang Yang seemed to be on the right path, and the speed of analysis and cracking was very fast.

Gu Ruoxi was also speechless for a while, is this guy's brain circuit different from ours! It can all be done......

Minutes and seconds passed, and the stone room was silent. Neither Xiaohuo nor Gu Ruoxi made a sound to disturb Fang Yang, and Fang Yang himself was already immersed in the world of deduction and forgot about the concept of time.

I don't know how long it took, Fang Yang inserted the last wooden strip into the gap, and then with a slight pull, a compact pineapple-like structure appeared in front of everyone......