"..." Bai Tou Weng was speechless.

Yes!

How did he ignore this most important key?

When people are living, they can have nothing to eat, but they must have water to drink!

Especially when choosing a place to live, it is even closer to the water source.

but--

"I searched for a while, and there was no water source!"

Jia Guizi and Ding Buliu also noticed the same: "Yes, although there are some trees and barley here, they are sparse and not a climate!"

In short, this place is simply not suitable for living!

Zhan Cheng eagerly looked into the cave, and the figures of Ling Luoyu and Gu Lan were looming.

"Perhaps they can find the most suitable explanation!"

Ling Luoyu stood in the corner of the wall, looking at the elliptical corner, standing still.

Gu Lan frowned slightly and stepped forward: "Did you see anything unusual?"

"Don't you think that everything in this cave is too round?"

From the naked eye point of view, everything here is a complete whole.

It looks very smooth.

"It seems that this place has been polished and repaired with great care... But is such a crude cave used so well polished?"

"Yes!" Gu Lan's palm flicked across the stone wall: "Elaborate decoration...itself a disguise!"

Suddenly--

After he moved, he suddenly touched it back, and his eyes looked at Ling Luoyu scorchingly.

Ling Luoyu saw his different color: "What did you find?"

"a little!"

Gu Lan's palm walked up the stone wall, and finally stopped at a corner, with a sharp lips.

"found it!"

His finger bones hit the stone wall hard.

"There are seams here!"

Ling Luoyu understood, he turned his head to avoid the direct light, and looked laterally from one side.

Sure enough, when viewed from this angle, there was a shadow cast by light on the stone wall.

"There are shadows... it means that these walls are not as smooth as we see, but they borrowed the principle of light refraction to make them look as smooth as a mirror!!"

The two looked at each other, and tacitly fumbled on the stone wall.

Finally, at the corners on both sides of the stone wall, gaps were found and marked with a pen.

"What are they doing!?"

With sharp eyes, Ding Buliu saw the unusualness of Ling Luoyu and Gu Lan.

"What are they drawing on the wall?!"

"...It looks like a door!"

Before Zhancheng spoke, he suddenly understood something.

"They found the mechanism!"

Concubine Liang heard the movement and suddenly turned her head, and saw Zhancheng a few people flying into the cave and also rushing over.

"What did you find?"

"I don't know..." Gu Lan dipped his brush in ink and continued to paint on the stone wall.

From the outline that has been drawn, it is the shape of a door.

The gazes of Zhancheng and others wandered along the brush, their eyes horrified.

"There really are institutions..."

"You can find it like this!"

"admire!"

Concubine Liang squeezed the crowd away, walked to the stone wall, raised her hand and caressed: "Really..."

Why didn't she find these unusual?

If you find out early, maybe you will be outside now and start a new life!

"We just found the outline of the gap, which looks like a door, but the mechanism has not been found yet!"

Ling Luoyu bit the shaft of the brush, his eyes wandering on the stone wall.

"You all look for it, where is the mechanism that opens this door hidden!"