After feeling Lu Lie's meaning, the first vision automatically shattered and scattered into a piece of crystal debris.

Immediately after, the second vision flew in front of Lu Lie.

In a deep cave, Li Yuan lay on the ground, gasping for breath, as if his whole body was seriously injured. Opposite him, a fire stand was erected, flames creaking through the dry wood.

At the other end of the cave, an old man picked up a piece of wood and threw it into the flames. The old man turned his head, revealing a wrinkled face. The years have left dense marks on his face, but they have also carved the light of wisdom into his eyes.

The old man heard Li Yuan's moaning and turned his head to look at him. Soon, however, the old man turned his head back and focused his attention on the pile of torn paper in front of him.

An old man who lives at the bottom of the valley under the city of the Lost God?

Like the old man, the paper heads had obviously been tested by a long time, and they were all yellowed and a little blackened. No matter how gentle the old man's fingers were when they touched them, one carelessness also dotted some of the paper into pieces.

The paper was densely filled with formulas that Lu Lie couldn't understand, and Lu Lie adjusted the vision of the Eye of a Thousand Worlds and looked in a different direction. On the paper in front of the old man were all kinds of overlapping figures, including circles, ovals, squares, triangles, and lines that were different from the real and the virtual.

On the right side of each piece of paper, two words are written squarely. And these two words Lu Lie just knew each other, "Sparrow Yin".

The old man used a long branch as a pen and the earth as paper, and directly used the branch to engrave all kinds of strange symbols and words on the ground.

"Hey, old man!"

Outside the horizon, Li Yuan's weak and irritable voice came.

Lu Lie hurriedly adjusted his vision and turned his gaze to Li Yuan's direction.

Li Yuan supported the earth with his hands, trying to get up from the ground. But when he found out that he had failed, he had no choice but to lean on the cave and call out to the old man, "Since you said that you wanted to leave here, you could have left a long time ago." Why would you want to stay here for hundreds of years?

"You don't have family or friends under the tree, waiting for you to go back?"

The old man was so busy picking out the wrong formula on the ground with his hands, and making up for the correct one with a tree branch, and he didn't even have the strength to look back at Li Yuan.

He was busy for a long time before he said, "For the sake of science." ”

"For the sake of ...... Science?"

Li Yuan looked confused.

"What a stupid little fellow. No wonder you can fall off a bridge. The old man's tone was full of deep disdain and disdain, "When I was on land, I had to entertain endless banquets and interpersonal interactions, deal with the upper echelons of the Giant Tree God Sect who only knew how to use power and art, and the believers who vainly begged for immortality, and worry about whether the monthly income was enough to sustain the life of my big family...... And here, just me, I can calculate and study day and night, without eating or sleeping. No one is going to bother me, and no one is going to babble like a nasty bear kid during my working hours. ”

Of course, the last sentence of this old man obviously mocked Li Yuan.

Lu Lie smiled: It's a bit interesting, I didn't expect that after Li Yuan fell from the suspension bridge, he was saved by an "old scientist" who lived at the bottom of the valley.

Li Yuan thought for a moment. Obviously, after being ridiculed by the old man, he did not have even the slightest repentance. Soon, he was ashamed to make noise again: "At first glance, your words are very reasonable, but they alone cannot fool me, Master Li Yuan, who is extremely smart and unparalleled! You said that you can study your scholarship here quietly." But have you ever thought that even if you solve the world's first problem here, so what? No one knows what you are doing here, and you will stay here forever alone with your achievements, doing your useless work forever. ”

The old scientist stopped what he was doing, turned around, and glanced at Li Yuan coldly with a cold gaze that could kill a dead person.

Li Yuan thought that his words had angered the other party. He shrank back in fear and forcibly said, "What...... Don't forget, you're a scientist! A scientist must have grace. ”

But the old scientist just looked at him coldly, and then turned back to draw his own formula.

"Who says my research here is useless?"

The old scientist easily marked a circle he had drawn, "Everything I do here is to stop Yao and the ambitions he left behind five hundred years ago. ”

Yao!

I can't count the number of times I've heard this man's name. Lu Lie's pupils still shrank to two points.

This old guy has obviously disappeared for more than 500 years. But what he did, what he left behind on the giant tree, still has a profound impact on Lu Lie's generation. No one can even confirm whether he is dead, whether he is still hiding somewhere in the giant tree world, coveting all the tree climbers.

Here, when he heard the word "Yao" in the old man's mouth again, how could he not make Lu Lie excited? He was already waiting to hear some new clues about Yao from the old man's mouth.

"Yao?" Returning to the horizon, Li Yuan tilted his head, looking very curious, "I've heard of this person's name." He's a great mystic, like something...... The top of the Cult of the Giant Tree, right? A second expedition was also organized, which ended up with his last hundred followers, after leaving a huge city inside the Giant Tree. It's completely gone. ”

The old man smiled: "Little brat." I don't know where you got this information, though. But if you know so much, you didn't do your homework before you went up the tree.

"Still, there's one thing you're wrong.

Yao didn't disappear at all. On the contrary, he is alive, alive and well, better than any of us. ”

Li Yuan was not convinced: "Grandpa, bragging is not a good habit. You've been in this cave for so long and haven't been out, and it's understandable that you're bored and make up some stories on your own. However, the one who told me that Yao disappeared was a member of the expeditionary force back then, and what he said was much more reliable than what you had figured out here. ”

After all, one is the three heads of the personal experience, and the other is the old man who works behind closed doors in this cave. Who to believe, Li Yuan did not hesitate.

"Oh, so there are still people in the expeditionary force who survived?" the old man smiled, "I thought I was hiding here alone and escaped the catastrophe." ”