Seeing so many good things, Lu Yu hurriedly ran outside, found a sheet, and then put all the things in, tied them into a big package, and carried the weight, well, it's okay, you can move it.

Raising his eyes to look at Liu Shigang, he saw that he was looking at himself nervously, and when he looked at him, he hurriedly pretended not to care, and Lu Yu glanced at him suspiciously.

"What are you nervous about? Are you trying to play some tricks? ”

"No, hehe, I'm afraid of you, I'm afraid that you will regret it."

Lu Yu glanced at him, suddenly his mental power was full, and he carefully scanned the vicinity, and found no ambush or anything like that, but when he swept the wall of this secret room, his expression suddenly moved, and there was a small safe here.

There was also a box inside the safe, and when he looked through the box, he 'saw' a stone that looked like jade, but this stone was much more transparent than jade, and he vaguely looked at the inside of the stone as if there was a mist flowing.

Lu Yu's heart moved, this thing was hidden so secretly, it was definitely a treasure, and Lu Yu had already felt the energy contained in the stone, it was definitely not an ordinary thing, so Lu Yu turned his head to look at Liu Shigang and smiled.

Liu Shigang was furious by Lu Yu's laughter, and asked cautiously, "What are you laughing at?" ”

Lu Yu stretched out his hand and pointed to the wall, "Go, open that safe for me." ”

Liu Shigang's face changed, but he still said forcefully: "There? There's nothing there. ”

Lu Yu didn't speak, took out two nails and shook them, Liu Shigang saw it, his face turned white one by one, his expression struggled for a while, and finally sighed dejectedly, walked to the position of the door, and twisted a few screws on it, and suddenly the originally flat wall suddenly cracked, and spit out a lockbox.

Liu Shigang opened the lockbox, took out a small box from inside, closed his eyes with a painful face and handed the box to Lu Yu, Lu Yu smiled, took the box casually, looked at Liu Shigang and asked, "What's in it?" ”

"Neng Yuan Stone." Liu Shigang said dejectedly, his heart was like ashes at this moment.

Lu Yu's expression froze, and he couldn't help but feel a burst of ecstasy in his heart, he didn't expect this to be Nengyuan Stone, the name of this thing he had heard of, but he hadn't seen it yet, but he knew the value.

Nengyuan Stone is a very rare ore that is only produced in the other world, which contains very pure energy, which can be directly absorbed, and more importantly, after the energy here is absorbed, it can also automatically absorb energy from the air to recover, so to speak, with it, it is equivalent to having a portable energy source, and you can absorb it whenever you want.

Of course, the speed of this automatic reply is very slow, just like such an egg-sized energy stone in Lu Yu's hand, which is not enough for an intermediate martial artist to absorb it, so unless it is a large energy stone, it is not very useful for a middle and advanced martial artist.

But because of its pure energy, it is definitely a rare treasure for low-level martial artists to use, plus the energy stone has some special functions, so the price is very high, it is a real rare treasure, and it has always been sold in wheels.

Just such a piece of energy yuan stone the size of an egg, if it is auctioned, it will be worth at least hundreds of millions of yuan, and it is still priceless, because this thing is so rare, even the strong grandmaster will be moved when he sees this kind of thing.

After all, having this thing is equivalent to carrying this pure energy source with you, even if it is not enough when cultivating, it is still possible to use it to restore energy during battle, and if there are more energy stones, or use energy yuan stones to build a cultivation room, it is also a rare cultivation treasure for grandmaster-level powerhouses.

What people didn't expect was that the Liu family actually had a piece of this thing, you know, even if you have money, you may not be able to buy it, and it occasionally appears, but it is also when the major auction houses are auctioning.

The reason why Nengyuan stone is expensive is not only because of its role, but also because of its scarce production, which is not like gold ore and iron ore, which contains tens of millions of tons in a deposit.

Even if an energy mine is found, there are generally not many energy stones in the mine, and if you can make a hundred and ten catties, even if it is a rich mine, it is generally a few dozen catties, because if you want to generate energy stones, it not only takes time, but also requires a large amount of aura, which is definitely not so easy to form.

Lu Yu put away the Nengyuan stone with a smile, and couldn't help the smile on his face, this time he is really rich, with such a piece of energy stone, whether it is to cultivate by himself or to use it for his sister Lu Xiaoxiao, it is a rare treasure.

Well, this thing has to be hidden, so as not to be seen by others and cause trouble, and even Lu Yu wants to be killed by Liu Shigang directly, lest he leak the news of the energy stone.