Without further ado, Xu Xin jumped on the rusty iron ladder and struggled to get up.

Isn't that red gas that he just opened the iron door of the underground passage, the red smoke that stinks from the iron door and makes people doubt life!

The smoke will float upward, and it will surely spread up the passage until it fills the entire passage!

He must not be overtaken by these smokes. Whether it is poisonous or not is another matter. He doesn't want to smell it anymore.

climb! Climb!

With the red panda Coco lying on her shoulders and Xu Xin carrying a treasure chest on her back, she crawled up frantically as if she had been hit with hormones.

At this moment, Xu Xin, who was carrying the treasure chest, seemed to be running with a heavy load, but when he thought of the pattern on the treasure chest, he finally gritted his teeth and did not throw the treasure chest away.

He didn't know how long he had been crawling, only that his hands and feet were almost numb when he climbed.

In the end, he couldn't hold on anymore and hung on the rusty iron ladder, gasping for breath.

He looked back in horror.

However, to his surprise and joy, those red mists were not following behind his buttocks, but far below, and Xu Xin, who had night vision ability, could barely see the faint red below.

The speed at which the red gas spread seemed to be much slower than he had imagined.

Xu Xin breathed a sigh of relief, sat down on a ladder, and began to rest.

Before the red gas comes up, let's eat something.

Xu Xin took out an apple and gnawed it, and stuffed it with Coco by the way.

Coco also nibbled an apple on his shoulder.

After one person and one panda had enough to eat and drink, Xu Xin almost rested.

He felt his body in surprise. If it was before, after strenuous exercise, he would never have recovered so quickly. Now his physical fitness is really different from before.

Glancing at the bottom, the red mist was a little closer, but it was still far away.

But Xu Xin didn't waste any time, and continued to climb up.

Only when he returned to the ground and stepped on the ground protected by the tree house could he feel a little more at ease.

Continuing to climb, Xu Xin maintained a good rhythm this time, no longer in a hurry like just now, getting closer and closer to the exit step by step.

After crawling for a long time, just when he felt that he was about to reach the exit, the cocoa on his shoulder suddenly screamed, and the sound was full of anxiety.

"What's wrong?" Seeing that Coco was in such a hurry, Xu Xin looked back.

Then I was shocked!

That smear of red was actually very close to him, only five or six meters away.

what happened! How did it spread so fast? !

In just an instant, Xu Xin wanted to understand the principle. The red gas does diffuse slowly, but it does not mean that the release in the room below is slow. As long as the release is accelerated, the concentration of the red gas will increase, and the air pressure will increase, and the diffusion will naturally become faster!

"Fuck!" Xu Xin cursed angrily, speeding up the climb.

This time, he behaved well, no longer using all his strength, but still maintaining the rhythm, but the extremely fast speed still made his body a little overwhelmed, and gradually his breathing began to become disordered.

While crawling, Xu Xin looked back and looked down from time to time, the smear of red was getting closer and closer to him, it was only two or three meters away!

"I can see the exit!" Xu Xin became excited, and no matter what the rhythm or rhythm, she started to climb up with all her strength.

Just before Hong Wu was about to catch up with him, Xu Xin rushed out of the iron gate, then with all his strength, he lifted the heavy iron cover on the other side, and slammed it towards the exit.

"boom!"

A few wisps of red smoke came out from the last gap of the iron cover, and the rest were locked under the iron cover, in the incomparably long passage. .

That plume of red smoke got into Xu Xin's nose.

"Yuck—"

Just one wisp made Xu Xin nauseated. He couldn't believe what would happen if his whole body was soaked in that red smoke.

Sitting at the exit, Xu Xin was gasping for breath. Because of the excessive climbing, his arms and legs were shaking, and his head was a little dizzy.

Coco leaned on his lap and looked at him with his head tilted, as if to say how tired you are.

"Little thing!" Xu Xin rubbed Coco's head angrily.

After resting for a few minutes, Xu Xin felt that her physical strength was gradually recovering, so she stood up.

Walking out of the passage, the sun shone on him, and the sun was already shining outside.

After staying in a relatively dark environment for so long, Xu Xin suddenly saw light, her eyes couldn't stand it, and she covered the sunlight with her hands.

After gradually getting used to it, he looked at the ordinary plants on the ground, and finally smiled in relief.

The world below is really depressing, and the exhaustion and impact on his physical and mental energy along the way has never stopped. Having seen those monsters in the underground world, Xu Xin even thinks that the beasts on the ground are so cute.

The surrounding area is still the wasteland left after the yellow flowers withered.

"Go home!" Xu Xin wanted to go back to the tree house and have a good night's sleep.

Although his oranges (blue) have kept his spirits in a relatively high state, his physical and psychological exhaustion has reached a peak.

From where he is now, it will take about an hour to walk back.

"Hey... When will we be able to get a means of transportation?" Xu Xin thought that there was still an hour to go, and the two legs that had just been relieved were aching again.

He looked at the little guy who was lying on his shoulder and started to doze again, and shook his head helplessly. Man, I'm the mount, right?

No way, we still have to go back.

It was already the afternoon of the second day, and the sun in the sky should be around two o'clock~www.wuxiamtl.com~ It was the hottest time, Xu Xin took out the novice supplies from her backpack to fill it with mineral water. After taking two bites, he walked slowly towards the tree house as if he were taking a walk.

After he used the bottle of [Special Tree House Root Potion], the protection area of ​​the tree house was extended for another three kilometers, which was equivalent to quadrupling the area.

Xu Xin opened the map. At this time, there were still only wild beasts in the hill to the northwest of the map. When the protection area of ​​the tree house was expanded, that hill would also be in the protection area.

"I should have unlocked the iron armor now. Maybe, I can try to hunt beasts over there."

After walking for more than an hour, Xu Xin finally returned to the lake, and the tree house was on the other side of the lake.

At this time, the lake looks very calm, and you can faintly see the piranhas swimming in the center of the lake.

"Huh? Why do you feel that the scope of this piranha's activities is a little bigger? Is it an illusion?" Xu Xin frowned. He noticed that the closest piranha he could see seemed to be a little closer to the shore than when he had gone last night.

"Maybe it's just a coincidence." Xu Xin comforted herself. He really doesn't have a good way to deal with piranhas right now.

Walking around the lake, Xu Xin picked up a lot of reeds that could make ropes.

Back under the tree house, Xu Xin took out the bottle of grey potion from her backpack and sprinkled it on the roots of the tree house.

[The roots of the tree house began to grow for a second time, which lasted for two hours, during which time it was impossible to enter or leave the tree house. 】

Xu Xin: "...?"

What does root growth have to do with getting in and out of a tree house?

Looking at the treehouse in front of her with grief and indignation, Xu Xin, who had finally returned after a long journey of several kilometers, was locked out of her treehouse.

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