Yang Haosong was in a huge cave at this time, surrounded by hard stone walls instead of dirt walls. The cave was big enough for an adult to stand up straight, and there was still plenty to spare. But that's not what surprised Yang Haosong.

There were a lot of bones scattered across the ground of the clearing! It looked like most of the bones of rats or rabbits or small animals. Fortunately, I didn't see the bones that looked like people, otherwise Yang Haosong estimated that he would not just be scared of weak legs.

Yang Haosong poked there in a daze, looking at the bones in a daze, and didn't move the place. Until......

"Ahhh Yang Haosong felt that a person bumped into him from behind, and then pressed himself to the ground.

Well, it's soft and has a faint scent. Without looking back, Yang Haosong knew that it was Song Wenshu.

"Ah, Wenshu, are you okay?" Ye Fei and He Wenliang jumped over, floated Song Wenshu up, and asked nervously, "Are you okay?"

As for Yang Haosong, who became a human cushion, not only did no one care, but he was also complained about for a while......

"Lao Yang, what are you stunned about, what should you do if you bump into Wen Shu?"

"Lao Yang, you are really, fortunately Wen Shu is fine!" This is He Wenliang.

Yang Haosong wanted to cry without tears, just when he was on it, he faintly felt that the two of them always seemed to peek at Song Wenshu unconsciously, and at this time it was confirmed, both of them had plans against Song Wenshu!

"I'm fine!" Song Wenshu smiled heartily: "It's Lao Yang, are you okay?"

"No, it's fine. Yang Haosong smiled awkwardly and shook his head.

"Hurry up and let go, there is Xiao Cheng in the back, it's terrible to be hit by him. Song Wenshu smiled, and then stretched out his hand to Yang Haosong, to pull him up.

Yang Haosong instantly felt a strand, no, it was two murderous aura!

Noticing Ye Fei and He Wenliang's "vicious" eyes looking at him, Yang Haosong hurriedly got up by himself. Haha: "Ah, yes, yes, get out of the way, be hit by Xiaocheng's hard muscles, but it's not comparable to being hit by a soft girl paper." ”

As soon as these words came out, Song Wenshu's face flushed, but it disappeared in a flash. It was He Wenliang and Ye Fei, and the "murderous aura" in their eyes was even more obvious.

Yang Haosong knew that he had said the wrong thing, so he quickly changed the topic while dodging: "Why are there so many here, well, bones?"

"Wait for the captain, let's talk about it when they come down!" Fu Yitao, who came down one step ahead of Yang Haosong, shook his head: "But in my opinion, eighty percent of this mission is going to be upgraded!"

More than ten seconds later, Luo Xiaocheng came down, followed by Wei Liying, and finally Du Pengyu.

None of them had any special reaction to the situation in front of them, and they thought they had seen a lot. But they all have the same judgment as Fu Yitao.

This mission is going to be upgraded!

"It seems that there really is a demonic source! The Lingqi here is a little richer than in ordinary places!" Wang Jinli basked for a moment, and said with a slight wrinkle in his nose.

"Aura?" Yang Haosong was a little strange, and interjected and asked, "Since you all say that it is a demon source, shouldn't it be a demon qi?"

"Hehe, you may have some misunderstandings!" Ye Fei showed Yang Haosong a 'vicious' look because of Song Wenshu before, obviously just joking. At this time, listening to Yang Haosong's words, he smiled and drew the word 'Qi' in the air with his fingers. If it was a light comparison, Yang Haosong would definitely not be able to see anything, but as a flame powerhouse, he left a flame texture in the air.

"This is what we call 'Qi'! It is the power that exists between heaven and earth. All living beings have Qi in their bodies, you have it, I have it, Zhang San and Li Si also have it! A cat, a dog, a mouse and an ant all have it, but there are more and less!" Luo Xiaocheng also mentioned the concept of Qi before, and Yang Haosong had a general feeling, so he nodded. Ye Fei continued to explain: "Qi itself has no attributes, but it will have attributes due to personal physique or some other reasons. For example, Wei and I are Qi with flame attribute, sunspot is earth attribute, and Jinli is water attribute. It's all regular attributes!, and the essence of Demon Qi is the same, but it's slightly different. It is usually the Qi that is contaminated with extremely negative emotions, but there are also other situations that produce the Qi of the Devil! However, the Qi will only be divided into specific attributes when it is in the body of a living being or other special existence! In the natural world, it is all attributeless, that is, the Qi!"

Yang Haosong didn't seem to understand it, but he finally knew that even if they were looking for a demon source, there could be aura here, no, it was Lingqi!

"Let's go back to the headquarters for the popular science class!" Seeing that Ye Fei still had the meaning of continuing, Wei Liying opened her mouth to interrupt: "When Lao Yang awakens, the logistics team in charge of awakening will explain the matter of Qi to him!"

Ye Fei nodded, and the group began to carefully examine the cave.

Actually, there is nothing to see, this is just an ordinary big cave, except for the bones on the ground, there is nothing to obstruct the eyes. The only thing that caught their attention was another deep passage on the other side, and they didn't know where it would lead. But it's safe to assume that this cave, and the 'slide' hole that connects to it, should have something to do with something on the other side of the passage.

The group walked deeper along the cave, the cave was slightly downward, and as before, it was completely rocky, and from here the hole was completely carved out of the rock layers!

Backwards, after walking for a few tens of meters, there is a turn, which makes people dizzy.

"Which direction are we heading in now?" Bai Yiran asked in a complaining tone.

"I don't know, the slide is making my head foggy. He Wenliang patted his head: "Xiaocheng, you should have a compass or something, right?"

"Yes!" Luo Xiaocheng's answer was simple and direct, he took out the compass from a small bag he carried with him, and glanced at it: "It's in the southeast direction, well, it's due east now......"

After several turns in a row, it is estimated that the overall direction is still towards the southeast area, and it looks like it has traveled about a kilometer.

"This location ......" Wei Liying frowned slightly: "It seems to be under that sewage treatment plant, right?"

"I feel that it should be, I'll try it with my mobile phone!" Song Wenshu said, took out her mobile phone, but when she clicked on the screen, she pouted: "No signal!"

"Normal, this is more than ten meters underground, and there are stones all around!" Du Pengyu said with a smile.

"From here, Qi is more obvious!" Wang Jinli suddenly said.

"Everyone pay attention, something may happen at any time!Lao Du, you protect Lao Yang, he has no ability to protect himself!" Wei Liying commanded.

"Okay!" Lao Du stood beside Yang Haosong, and everyone became alert.

After that, however, nothing happened.

Turning a corner again, a door stood in front of them.

It is not a common wooden or metal door. It was a heavy stone door, and if it weren't for the faint light in the gap, the group might not even be able to find that there was a door here instead of a dead end.

"Everyone be careful, Lao Du, come on! Xiao Cheng, you will protect Lao Yang in exchange!" Wei Liying arranged.

The two people who were called answered and switched places.

Yang Haosong didn't understand why Du Pengyu was asked to push the door instead of Luo Xiaocheng or others, but he soon understood.

Du Pengyu walked to the stone gate, and then turned to look at the others. The others obviously had a tacit understanding with him, and took a few steps back, and He Wenliang stretched out his hand and pressed it on the stone wall. Immediately after, the stone wall clicked and shook, and a thick stone wall slowly rose. Everyone hid behind the stone wall.

Yang Haosong peeked at Du Pengyu in front of the stone gate, and saw that Du Pengyu's body faintly glowed blue-black, and the surface of his skin slowly changed color, turning blue-black, and faintly with a metallic luster.

"Lao Du is a metal department, and he has the ability to metalize his skin, which can be called invulnerable. It's our main attacker!" Luo Xiaocheng saw Yang Haosong's surprised face, and explained with a smile: "Okay, hide well, don't make sure that there will be anything strange when the door is opened!"

Yang Haosong nodded and retracted to the back of the stone wall. Then a creaking sound was heard, and it was obvious that the stone gate was being pushed open by Du Pengyu.

"It doesn't look like there's any lubrication!" Wang Jinli complained with a grin.

After a few seconds, the crunching stopped. After a while, the originally dark stone gate suddenly brightened, and at the same time, Du Pengyu's voice came: "Everyone come here, there is no danger!" Wei Liying was the first to poke her head out, and seeing that there really didn't seem to be any danger, she made a gesture to wait and walked through the stone gate alone. After a few moments, he beckoned the others over.

After Song Wenshu and Fu Yitao entered, they also tested the air and confirmed that the oxygen content was okay and there were no toxins in the air.

Hearing that there was no danger, Yang Haosong's originally very nervous heart finally let go. But even so, he was at the back of everyone.

Luo Xiaocheng heard that there was no danger, so he did not continue to stay by Yang Haosong's side.

Yang Haosong followed the other team members through the stone gate.

Passing through the stone gate, Yang Haosong faintly smelled a faint aroma. The aroma cleared his mind. The tiredness that had arisen from the near-midnight was gone.

What kind of aroma is this? Yang Haosong was a little worried, but it could be seen that the others didn't seem to care, and Song Wenshu said that there were no toxins in the air before, so he didn't pay attention to it.

Behind the stone gate is an obvious man-made building, although it is full of the atmosphere of the seventies and eighties of the last century, the walls are only made of cement, and there are several high-power lamps on the roof. It's not just Du Pengyu who just opened it, but it has been open.

The room is very large and supported by a dozen cement pillars in the middle. In the center of the room, there is a square pool, which is twenty or thirty meters long and wide. The location of the stone gate is not visible, and the depth should be ten meters away. Other than that, there is only a row of white tin cabinets in the corner, the kind with glass on the door. And on the side of the tin cabinet there is a row of ladders nailed to the wall. At the top of the ladder is an iron valve in the corner of the top of the wall.

"Here, it looks like there's nothing!" Song Wenshu looked around suspiciously.

"Look around, be careful!" Wei Liying commanded, and walked towards the pool, the most conspicuous in the room was, of course, the pool. However, before they arrived, Wei Liying and Song Wenshu beside her had already changed their faces!