Everyone walked in the ancient city, observing and recording the terrain and situation around it, and because it was already daytime, those crystals in the sky emitted strong light, so the brightness of the surroundings was still quite high, and there was no need to use lighting tools such as lighting sticks or flashlights.

This ancient city is quite huge, and it is no less than a small town, so the investigation work of Chen Nuo and others will also take some time.

However, they investigated for less than ten minutes before they made a discovery.

Bones.

Bai Ling and the others found white bones on the streets of the ancient city, and there was not just one, but several. There were several white bones, lying in the streets of the ancient city, and some were scattered on the wooden tables nearby, in the doorways, in the houses, and even on the roofs of the houses.

There are almost nine bones in this small street.

"These.... Are they all residents of Loulan in this ancient city? Bai Lingdao.

"It should be." Chen Nuo replied.

"How would they die here?" Ziling Fei looked at the white bones around him and asked, and then said: "Even if they die, they should die outside, why did they die in the ancient city, is there something wrong?" ”

Regarding Zi Lingfei's question, Bai Ling looked at Qiu Ling'er and Qiu Shuang, who were walking next to him, and asked, "Do you know the reason?" ”

"This.... We really don't know. Qiu Ling'er shrugged helplessly.

"Do you know how the people of Loulan survive in the dungeon? Could their death be due to a problem with their living conditions? Lin Xuan, who was walking in front, turned his head and asked, he was a little suspicious of this.

And this, Qiu Ling'er and Qiu Shuang really know, and they can also say, Qiu Ling'er immediately replied: "We know this, in this underground city, in addition to building the ancient city and those glowing crystal structures in the sky, the Loulan people also planted many trees and plants in the ancient city to ensure oxygen, dug a secret channel of an underground river to ensure water sources, and at the same time stored grain and grass, as well as planted crops, and raised pigs and chickens in captivity to ensure food. ”

"In other words, they don't have any problems with their living conditions?" Lin Xiandao.

"Judging from the grain and grass they brought into the ancient city of Loulan at that time, plus the situation they raised in captivity, there will be no problems for at least fifty years, as long as it is not an accident, such as the underground river drying up, the grain and grass being burned, and so on." Qiu Ling'er said.

"You know a lot." Zi Lingfei couldn't help but say.

"As long as it was before the Loulan people entered the dungeon, we basically knew about it." Qiu Ling'er replied with a smile.

"Let's move on." Chen Nuo said lightly, but in his heart, a layer of doubt deepened again.

Qiu Shuang, Qiu Ling'er, these two people are too suspicious......

However, there is nothing else that can be done now except to be wary of them.

So, the crowd moved on.

The group continued to investigate, and soon they walked out of the neighborhood and came to a large stone bridge. Beneath the stone bridge was a river with water flowing in it, and the sound of running water had been heard long before everyone had come here.

When I walked to the bridge, I saw that there were also many white bones on the bridge, and there were all around, more than the previous block.

However, everyone's attention was not on these white bones, and when everyone walked on the big stone bridge, Bai Ling walked to the side, looked at the flowing water below, and said, "There is really an underground river." ”

"Well, it's a bit surprising to me, I didn't expect this river to dry up after a thousand years." Qiu Ling'er walked up to him and sighed, but as soon as she finished speaking, when she looked down at the underground river, she said "eh".

"What? Huh!? Bai Ling asked, but after he looked at the river, he also sighed.

Why did the two suddenly ask?

Because, the two found that in the current of the river, something floated. Although the things were relatively small, and the river under the bridge was relatively dark, Bai Ling and Qiu Ling'er, as well as many other people who were watching the flow of the river, had also discovered these things at this moment.

The things floating on the river are small fragments, crystal clear.

These are..... Ice cube?

"These are... Ice cubes? Bai Ling felt like this, and asked directly, and Qiu Ling'er next to him also looked at it carefully for a while, then nodded in agreement: "I feel a little similar." ”

"Ice cubes indeed." Qiushuang stepped forward to take a look and said.

On the other side, Chen Nuo and others also saw that this was an ice cube, and many people also saw it, and everyone was wondering, why was there ice floating in the underground river of Loulan Dungeon?

And Qiu Shuang was the first person to notice the problem at this moment.

Qiu Shuang looked around, and as a younger sister, Qiu Ling'er felt as if her brother had noticed something, so she asked, "Brother, did you find something?" ”

Qiushuang looked at her and did not speak, but nodded her head as she said yes.

"What did you find?" Qiu Ling'er asked.

"This dungeon is a little cold." Autumn Frost Road.

"What?" Zi Lingfei on the other side of Bai Ling shouted suspiciously, and at this moment, many people were also surrounding Qiu Shuang. Lin Xian stepped forward directly and asked, "What do you mean by this?" ”

And what about Qiu Ling'er? At the moment, I understood it all at once.

Qiu Ling'er stepped forward and said, "This dungeon, it shouldn't be such a temperature, such a low temperature, only found in that fake ancient tomb, the purpose is to let those insects enter a state of hibernation." ”

"What do you mean!" All of a sudden, everyone seemed to understand.

"In this dungeon, there should be some cracks and gaps, so that the cold air continues to flow into the dungeon, and in the dungeon, except for the river, the rest is fully sealed, and the cold air will not flow out, so the dungeon, just like the ancient tomb, the temperature has become ultra-low." Qiu Ling'er said.

And Bai Ling, at this moment, also subconsciously looked at the river and said, "So say.... The river, before we came in, was supposed to freeze, but we came in for too long and let too much hot air flow in, so the ice melted!? ”

"It should be, as I said before, the story of the Loulan people after they entered the dungeon for refuge, we don't know very well, these are just my brother's speculations." Qiu Ling'er waved her hand.

"We'd better move quickly." At this time, Qiushuang said coldly.

For a while, the audience was silent.

After a moment of silence, Chen Nuo looked at Qiushuang with a condensed gaze and asked, "What do you mean?" ”

Qiushuang, on the other hand, turned to look at everyone, his face was expressionless, and he explained to them in a cold tone: "If the speculation is correct, then it is very likely that the insects will enter the ancient city through those gaps and cracks. ”

When everyone heard this, they all showed a look of surprise, and even Qiu Ling'er was shocked.

As for Bai Ling, after being shocked, he quickly sorted out his thoughts and said, "If that's the case, then the bug is very likely to be in the ancient city, and it is very likely that it was already in the ancient city, even before we arrived here!" ”

"We have to leave right away." Autumn Frost Road.