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This incident was just a flash of inspiration, which left a mark in Tan Yanlin's mind, but did not make him think deeply about it.

All the truth will gradually come to light. There is no need to rush. After all, he and Hongdou are still young and there is still a lot of time and a long way to go.

In the four-kilometer-long tunnel, apart from the sounds of breathing, footsteps and horse hooves, other sounds gradually died down.

Yu Hongdou became sleepy as she walked and almost fell asleep on her brother who was walking in front of her.

"The fracture is in front." Xu Da's reminder instantly made Yu Hongdou alert.

The fracture site is right in the middle of the cave.

Yu Hongdou asked her brother to hold up the torch and looked up. She found that the ceiling of the cave was two or three meters higher than before and had collapsed into an oval shape, which was a bit like a hall opened in the middle of the cave.

"What a coincidence! It feels like a place for people who are tired to rest." Yu Hongdou muttered. The roof of the shed was reinforced with stone pillars and stone slabs, which made it look more like a shed.

"Now that you mention it, it does look like it, but we don't really dare to rest here for fear that it will collapse again."

Xu Da waved his hands. He knew clearly that for a cave pressed under a mountain, a few stone pillars and stone slabs might not be able to support it.

Yu Hongdou nodded. That’s right. A gentleman does not stand under a dangerous wall. It’s better to be careful.

She didn't plan to stay any longer and was about to leave with the main group. After entering the cave, Wangwang, who had been as quiet as a chicken, suddenly cried out towards the high ceiling of the cave.

Yu Hongdou was startled, and before she could react, she was blocked behind her brother.

"What is that?!" the guard behind Tan Yanlin shouted and threw a few locust stones casually.

"Squeak!" After a scream, a little guy who was hiding very well on the top of the cave ran away quickly.

Yu Hongdou stared at the conical head in shock for a moment, and it took her a long time to remember what it was.

"Lingli?" The guard who threw the stone was surprised and put away his guard.

"It seems that this little guy and his family accidentally dug through this place." Tan Yanlin also saw it and shook his head with a smile. It was indeed quite scary out of the blue.

Carp? Yu Hongdou blinked for a long time before she remembered, oh, pangolin!

She stared at a small hole that appeared on the top of the cave, wondering, isn't it true that the pangolin dug through Hulu Mountain is not a myth (animation)?

"The upper layer of this cave is gravel and sand. I'm afraid that when the little guys were digging the hole outside, they accidentally dug a weak spot on the top of the cave, and the stone wall on the top of the cave couldn't hold it and collapsed."

Tan Yanlin looked at the small hole on the top of the cave, gestured with his finger, and informed everyone.

Mo Shougui nodded and said, "That's true. From a mechanics point of view, the points dug out by the little guys are exactly the points of force."

"They were almost scared to death." Xu Da stroked his chest. He was afraid that the cave would collapse, and he was even more afraid that the cave would collapse and bury everyone inside.

If something really happens, even a hundred of them can't repay the debt.

"Okay, let's go." Otherwise, the worry would turn into a dream come true, which would be the end of it. Yu Song complained to himself and urged everyone to leave quickly.

The large army in front had already walked some distance with their horses. Xu Da reacted and urged everyone to move forward quickly.

Yu Hongdou nodded and was about to continue walking when suddenly something fell out from the small hole on the top of her head and hit her directly on the forehead.

Such a high distance, plus the weight of the object itself, immediately left a bruise on Yu Hongdou's forehead.

"What..." Yu Hongdou wanted to curse in pain. She lowered her head and was about to kick, but when her foot was only 1 centimeter away from the falling object, she suddenly stopped.

Why does this thing look so familiar? Yu Hongdou leaned over and picked up the mud-like thing with a handkerchief.

"Is this... gold?" Yu Hongdou rubbed it with her handkerchief. A hint of gold was very obvious under the reflection of the firelight.

"No." Tan Yanlin looked over and shook his head to deny it.

"Is it that?!" Yu Hongdou had already wiped most of the things in his hands clean.

I thought it was a deformed gold ornament, but as Yu Hongdou rubbed out larger and larger areas, its color and shape gradually became apparent.

"It looks a little strange, yet familiar." Mo Shougui came over, took it from his apprentice and looked at it carefully for a few seconds, feeling as if he had seen it somewhere.

"It looks like a drill bit." There are also drilling tools at this time, but the shape of the drill bit is slightly different from the one in front of him.

The hand drills and lathe drills used today are all straight-shaped grooving types, but the drill bit discovered by Yu Hongdou is an inverted cone with a sharp front end.

The top of the drill bit seemed to be somewhat yellow and transparent, and Yu Hongdou suspected that it was combined with diamonds.

Thinking about it this way, the formation of this cave makes more sense!

"Another object that seems to be the manifestation of the Hat Fairy." After the drill bit was completely cleaned, Yu Hongdou was 100% sure that this thing should belong exclusively to the Hat Fairy.

"?" Xu Da looked at the drill in confusion for a few seconds and gestured a few times. He was probably still wondering in his mind what kind of strange tool could be used to drill such a big cave with such a small thing.

Yu Hongdou suddenly remembered that she had not told Xu Da about the legend of the two springs and that Changlin Zhenren was Tao Sheng.

Hey, look at her memory! Yu Hongdou slapped her forehead and immediately briefly explained the legend of the North and South Springs to Xu Da.

Xu Da held the drill in his hand. After listening to the two springs that appeared out of thin air and Tao Sheng's journey to Changlin and then returning again, he started to draw ink in a dilemma.

After a while, he suddenly raised his head and looked at Yu Hongdou: "Do you know why we settled in this deep mountain of Cigou Village?"

Yu Hongdou shook her head, but seeing that Xu Da brought it up at this moment, she was afraid that it was related to what she had said before and after.

Sure enough, Xu Da held the drill bit and gestured in the air twice: "Because our village also has two springs, and one is cold and the other is hot, one is east and the other is west, the size is the same, and it corresponds completely."

"..." Such a big thing, she didn't even know about it! Yu Hongdou felt a little silly. Why did she have such a stereotyped impression of Cigou Village? She always thought that they lived in the mountains because they couldn't bear to part with the mountain products and amber here? !

Yu Hongdou looked at Yu Song with resentment, "Brother, why didn't you tell me such an important thing? If I had known that there was a hot spring in Cigou Village earlier, she would have come here a long time ago. The road construction in Cigou Village has been going on for a long time."

Yu Song looked back at his sister innocently, then looked at Xu Da reproachfully: "Uncle Xu, you guys have kept this secret really deep~" He didn't even know how many times he had come here.

"I didn't hide it, I just didn't remember it..." Xu Da stroked his beard embarrassedly.

Everyone has been in the village for a long time and doesn't think this is strange. Most of the time when they mention this, they just think that their ancestors were really good at choosing a place and found a good feng shui spot for them to live in seclusion.

When the atmosphere was awkward, the blind student Tan Yanlin discovered the bright spot: "Excuse me, Uncle Xu, do you know who found this place when the whole village moved?"

Was it that the place came first and then the spring, or that the spring came first and then the place?