The sound is louder and louder, which makes people feel refreshed when they hear it.

This kind of sound, instead of making people irritated because the sound is too loud, will bring a kind of tranquility, a kind of concentration.

However, Fang Yunye and Professor Zhao, who heard that voice, did not have any sense of tranquility.

A chill rose violently from the soles of their feet, rushing straight to the heavenly spirits!

Rustle, rustle......

The subtle sound, the obvious clashing sound, resounded in the space behind them, the movement of the body touching the rock, the sound of the scale armor rattling, the sound of the soles of the feet rubbing against the ground and the rocks, one after another.

Inside the passage, those sleeping creatures have awakened!

"Run!"

Fang Yunye let out a low snort and rushed out in one step.

Professor Zhao's reaction was not slow, and he rushed out the moment he shouted, and the two of them jumped out of the passage in an instant, and the sound of movement behind them became more and more intense.

The next moment, another Qingyue sound sounded throughout the space, this time not just one, but a continuous sound!

The rhythmic and rhythmic percussion sound seems to be playing another piece of heaven and sound, playing a famous song that shakes the heart.

But it's a pity that the two people here have no intention of appreciating, they are in a hurry, moving forward quickly, without stopping.

Behind them, the monsters lying on the walls, the ground, and the top had already risen in unison. A pair of eyes that were extremely red, as if soaked in blood, opened, and then ...... rushed in the direction of the two of them.

Boom, boom......

The ground was shaking and the sound was whistling.

The two of them who were running suddenly heard the sound of approaching voices from behind, and with a slight glance, they could see the overwhelming smoke and dust billowing in.

The two of them tightened violently, and the speed under their feet increased again, and they rushed into a pitch-black passage in front of them in an instant.

……………………………………

In the dark passageway, gusts of wind blew.

Jiang Xian's clothes and hair swayed with them, but they didn't feel any cold, nor did they feel the cold before. was blown by the wind, but there was a little more hot feeling on the body.

"Continuous hot air...... We're almost at the furnace? Ling Xiaozi raised his eyebrows, turned his head and said, "Are you sure we're going to the oil depot?" ”

"The oil depot is next to the stove, what a genius to be able to make such an arrangement!"

"Designers aren't stupid." Jiang Xian glanced at him calmly: "The furnace is just on the way to the oil depot, not that they coincide together. ”

"Although the map does not clearly indicate the design and layout of the oil depot, there have been no problems for so many years, and even if the furnace is fried, nothing will happen to the oil depot."

"Just because you're not far apart doesn't mean there's really only a difference between the two......

Saying this, Jiang Xian's eyes suddenly froze, he turned to the side suddenly, and in the next moment, the flashlight slashed across the wall, and a black shadow suddenly jumped out, and then slammed into it along the gap in the wall, disappearing.

Ling Xiaozi and Lin Ruoxue's hearts sank, and at the same time, they tensed their muscles, and they were just about to turn around, but suddenly they saw black shadows drilling into the cracks again in the corner of their eyes!

The glow of the flashlight hit the walls, and a slight hot breeze blew on their faces.

All around, there was silence.

The three of them didn't speak, their eyes fixed on the wall, looking at every inch and every crevice there.

The walls here were not quite the same as the ones they had seen before, not only were they uneven, there were no murals, and there were many more gaps and holes.

But the walls around it are full of carved marks.

Although the cracks and holes look messy at first glance, a closer look reveals that there are obvious traces of tool strikes on the edges of the holes and everywhere in the gaps.

The sand and gravel under the wall are obviously traces left after carving.

But...... The three of them looked at the wall with more puzzled eyes than before.

They stood at a distance for a moment, looked at each other, and then walked a few steps in one direction to the wall.

Then, with a few gentle taps on the wall.

The crisp voice echoed from it, and the breathing of the three of them stagnated for a moment, and Jiang Xian said slowly: "That's really the case...... In the depths of this wall, there is a hollow structure, and even the depths are hollowed. ”

Ling Xiaozi licked his lips, even if he had guessed before, but now that he really got this answer, he couldn't believe it: "These two walls, so long, the depth inside, the flashlight can't find the bottom......"

"If it's hollow inside, or even hollowed...... Can it really be done? ”

As he spoke, he took a few steps back, his flashlight sweeping across the wall: "I'm not surprised if you dig a hole or a hole on the surface, or even a denser hole than this one on the surface. ”

"After all, I've seen so many magical ancient skills."

"But, is this kind of hollow hollowing really possible?"

Ling Xiaozi's doubts are also the doubts of Jiang Xian and the others.

The walls are so thick that they are trying to be hollowed out, which is almost impossible even with modern technology. In ancient times, even with the help of giants, or even with the help of giants themselves, I am afraid that they would not be able to do it either.

But that's not the only problem......

"Did you see the dark shadow just now?" Jiang Xian took off his gas mask, moved his nose slightly, and sniffed the smell around him.

"No, I just saw a black shadow, too fast, too small." Lin Ruoxue next to her replied, looking at the gaps and holes in the wall: "What if...... Those things live in these holes......"

"If they have a tendency to eat people, it's a big problem."

When the words fell, the expressions of the three of them changed in unison, and they took three steps back one by one and listened.

"This is ......" Ling Xiaozi frowned, put his hand to his ear and listened carefully: "Music? ”

"I don't know if it's music, but it's definitely the sound of the instrument, and the sound of the instrument." Jiang Xian said categorically: "Ordinary impact, ordinary metal collision, it is impossible to have such a clear and rhythmic sound. ”

"That's right......" Lin Ruoxue nodded: "I have studied musical instruments and watched ancient musical instruments play, this sound is not like a ring, nor does it look like a chime, but it has certain similarities with the two......

Before she could finish her sentence, her complexion changed, and a hot wind blew on their faces stronger than before.

But this time, not from the front and back of the passage, but from the wall where they corresponded.

Coming out of those holes.

Whispered whimpering, high-pitched sharpness, and sound echoed back and forth from the walls on either side.

In just a few seconds, the voice kept changing.

Melodious and high-pitched, whimpering, low and tactful, crisp and loud......

Just two walls, just two convective hot winds, in this small space, played a grand movement that only an orchestra can accomplish.

The heat was blowing, and the three of them unconsciously narrowed their eyes, and they couldn't help but take a few steps backwards and look at the hole in the wall again. At this time, those holes and cracks, with the sound of sound, some dim light came and went, as if calling for something.

"It's the sound of an orchestral instrument......"

Lin Ruoxue listened intently: "And it is a variety of orchestral instruments that cooperate with each other to play the rhythm and tone, but now it is ......."

"Just by relying on these two walls, with this gust of wind, you can play it!"

Jiang Xian and Ling Xiaozi's expressions have changed again, the performance of a variety of musical instruments?

You must know that there are different types of orchestral instruments, and the techniques used to play them are even more diverse, and they are related to the strength of the two walls, and you want to play all these characteristics by relying on the wind...... How complex and elaborate should the structure be?

However, before the two of them could finish their sighs, their eyes changed.

In the dim passage, layers of mist were spread.

Mist? Wrong!

Jiang Xian was stunned and woke up in an instant, and the thin mist spread in all directions in an instant, and it spread to the limit of his vision in the blink of an eye.

The thick fog shrouded the four fields, the ground beneath his feet became soft, and his body seemed to be upward, as if he was flying, as if he had come to the sky.

"It's ...... See God? Another kind of seeing God? Jiang Xian realized in his heart, felt the changes around him, and experienced the illusion he was in, without the slightest discomfort, without half a point of disharmony, how uncomfortable.

Compared with the various encounters he had experienced before, the scenes he saw were either grand or vast, and his heart was stirring, and he only had peace in his heart at this time.

Incredibly calm.

The melodious voice lingered in his ears, and wisps of fresh breath were sensed by his body, and the muscles of his whole body relaxed.

The next moment, the sky broke.

A ray of light pierced through the mist and then spread, restoring clarity to his entire vision.

High skies, vast lands, rushing rivers, towering mountains......

He stood in mid-air and looked down on the scenes.

In this vast world, tribal cities have risen from the ground, farmland has been cultivated, rivers have been fished, and groups of wild beasts have been domesticated and hunted...... More and more people appeared, and more and more walled cities were erected.

On the earth, the pace of people, the space for people is increasing.

"It's ...... The Evolution of Antiquity? Jiang Xian's eyes were a little interested, he looked down on the heaven and earth below, watched them cultivate and hunt, watched them fish and pick fruits, and watched them sacrifice and dance.

The sun rises and the moon sets, and the years go by.

The progress of the picture is fast, Jiang Xian looked at it very carefully, but there are also many pictures that disappear in a flash, and can only leave a vague impression.

In that picture, he saw the giant tortoise, the horned giant snake, the pattern of the innate gossip, and the sacrifices and prayers of these people day and night.

The picture suddenly stopped, the sky and the earth shrank instantly, the light around him became dim, and the space around him became narrow.

From overlooking the world, it has become overlooking the first district.

"It's ...... Sacrifice? ”

Jiang Xian's eyes flickered slightly, looking at the people who were densely surrounding the altar below, and suddenly looked at the side of the altar. As far as the eye can see, a wide wall full of holes and gaps stands there!

Clouds 18:23:06

The evening gives you the back