Chapter 761

Chapter 761

Xiaoxuan pushed the bowl of bean sprouts away with a spoon and said, "You have eaten more than 20 of them just now. Yunfeng and Brother Yu haven't tasted them yet, so get out."

"you are a pig!"

"If you don't serve it to me, I'll catch it myself!"

"Yeah, don't grab the spoon!"

I smiled and said Xiaoxuan, please let him eat. After he is full, he will have to rely on his efforts later.

"That's right! It's up to me to help! Give it to me!"

Bean Sprout picked up the stuffed black sesame and took a bowl for himself. He couldn't wait to take a bite, but it was too hot and burned him.

He raised his head and said with a smile: "The glutinous rice balls are ready. Brother Tian came so far, let's eat some too."

"Forget it, I've eaten."

This person is quite open-minded. He said that since I have collected your money, I won’t ask you what you do, you just tell me when to start.

Being able to drag this man down will be of great help to our group. After all, this guy surnamed Tian has been studying Guiziling for more than ten years.

"hehe..."

Tou Tou smiled and said: "That's natural, but don't worry. At this moment, we have encountered some problems that we haven't figured out yet." As he spoke, Tou Tou told me about the poisoning in the pond a few days ago by Uncle Xue.

After listening, Lao Tian frowned and thought for a while. He suddenly took out a small map from his bag.

I don't understand it very well. It should be a hand-drawn geological map around Daoxian County.

Opening the map to the ground, Lao Tian said: "The ponds around Guizaipo should have underground rivers. I noticed this back then, and later did a lot of research based on geology."

"Look here."

"This is the Yin Yang Cave not far from Gui Zai Ling. In the 1970s, hundreds of stone statues were discovered in the cave. They are in the same style as those in Gui Zai Ling. I have asked my geology friends before. My friend believes that tens of thousands of years ago, the Yin-Yang Cave should have been buried under water. After the water receded, it collapsed into a valley, forming the Yin-Yang Cave."

"It's rainy season in Hunan, and we found a lot of karst landforms near Dao County. It's estimated that after the water level dropped many years ago, the underground river dropped to a deeper place."

Speaking of this, he moved his fingers slowly: "The underground river slowly flows under Guizai Ridge. There are limestone mountains with large gaps. Rainwater seeps down along these gaps and eventually flows into the underground river. It creates a reservoir that we can’t see.”

"If the reservoir is stored for a long time, the underground limestone will dissolve and release a large amount of bicarbonate. Sodium bicarbonate is unstable. Once too much is deposited in the underground river, it will decompose into carbonate, carbon dioxide and water."

Speaking of which, he clicked on Guizailing marked on the geological map.

"There is a hole under the pond, which allows a large amount of accumulated carbon dioxide to spray up along the water flow. In a short period of time, the air is filled with a large amount of invisible gas, which is why you were in trouble before."

"This statement is completely valid, but there is one thing I don't understand and it has been bothering me."

Lao Tian frowned at us and asked: "To form such a high concentration of carbon dioxide, what is missing?"

Just listening to him talk, Dou Sprout didn't even swallow the glutinous rice balls he bit into.

Brother Yu and I looked at each other, big eyes and small eyes. I do not know.

Lao Tian said in surprise: "You don't know how simple it is? Haven't you ever gone to school?"

"This..." I said I had been there before, but I just forgot.

Douyazai swallowed the glutinous rice balls in one gulp, nodded repeatedly and said, "That's right, I forgot, just tell me."

"Why....."

He sighed, looked down at the ground and whispered: "It's dilute hydrochloric acid..."

"I think there might have been something underground that was massively rotting."