Yuantai's exclamation echoed inside the stalactite cave.
“It’s so spacious inside!”
Ayumi raised her head and opened her mouth in shock at this miraculous work of nature.
"Do you know the principle of formation of stalactite caves?" As a science teacher, Yuan Huaiyu naturally started the popular science lecture.
Mitsuhiko was worthy of being the most knowledgeable one among the trio, and immediately raised his hand: "I know, I know, that groundwater contains carbon dioxide. This water passes through the strata and gradually dissolves limestone. As the groundwater continues to drain, eventually it
A large stalactite cave was formed.”
"That's right." Yuan Huaiyu nodded approvingly.
"At the same time, the water containing carbon dioxide will carve the entire cave into various strange shapes, and produce natural landscapes such as stalagmites and stone pillars, which can be said to be a miracle of nature."
Listening to Yuan Huaiyu's explanation, several people walked towards the interior of the stalactite cave.
Suddenly, Conan squatted down.
He picked up something from the cracks in the rocks on the ground and quickly called Yuanhuaiyu.
"Teacher Yuan, wait a moment!"
Several other people heard the sound and looked.
Conan opened his palm, and there was a crumpled cigarette butt lying on it.
“The filter part of this cigarette butt is still wet!”
Yuantai didn't take it seriously: "Maybe some unqualified guy left it here before."
Yuan Huaiyu shook his head: "No, this cigarette butt looks like it was thrown away not long ago."
He paused and looked at the dark road ahead: "It seems that there are other people in this cave who entered here before us."
"Ah? Are you here to find the treasure?" Ayumi exclaimed.
"No way..." Gentai suddenly became anxious, as if he saw the eel rice flying towards the sky, "We should get the treasure first!"
He was about to rush forward when he was stopped by Yuan Huaiyu.
"Yantai, wait."
Yuan Huaiyu squatted down and stretched out his hand towards Conan: "I remember that your watch has a flashlight function, can you lend it to me?"
Conan was about to subconsciously take off his watch when he suddenly realized something was wrong.
——His watch has a pop-up sight and an anesthetic needle, both of which he doesn’t want to be discovered by Yuan Huaiyu!
"Uh...Teacher Yuan, my watch broke before, and I'm planning to ask the doctor to repair it after today..." He quickly found a reason to refuse.
Upon seeing this, Bumi immediately took off her watch, turned on the flashlight, and handed it to Yuan Huaiyu.
Yuan Huaiyu illuminated the uneven ground with the light of his flashlight: "Look!"
The four big heads came up and saw that there seemed to be nothing unusual in the place illuminated by the light, and they were still a little confused.
Conan was the first to notice something was wrong. He stretched out his finger and wiped it on a darker area: "It's blood!"
He extended his finger to the light, and there was a viscous red and black liquid on it.
"Why is there blood? Is the person inside injured?" Confusion and worry flashed in Ayumi's big eyes.
"No, it's impossible."
Conan pulled the watch off Yuantai's hand and looked around carefully.
"Look, here, here, and here, there are blood stains..."
Yuan Huaiyu took over his words: "Such a large amount of bleeding indicates that the injury is not minor. But if you are injured and still have to go into the cave instead of exiting the cave for treatment, it will be very problematic."
He raised the flashlight in front of himself, pointed the light upward, and held it with his chin. Under the interplay of light and shadow, his face looked like a ghost, which frightened several children.
"Perhaps they are here to dispose of fresh corpses or something... You see the cave is so hidden and intricate inside. The corpses placed in this place will not be discovered by others, and after they decompose, they will be thought to be lost by those who come after.
Explorer…”
Yuanhuaiyu's voice had a gloomy feeling: "I asked the locals before coming here. This cave is very big. Every year, several explorers die in it because they can't find a way out..."
The three children were so frightened that they did not dare to breathe, and Conan also looked over with a serious expression.
In his opinion, what Teacher Yuan said may really be the truth of the matter. At least judging from the situation at the entrance of the cave, murder and dumping of corpses really best explain the possibility of this scene.
"If it was a murder and a body dump, there should be more than one person... Let's go out first so we don't run into them."
Yuanhuaiyu immediately made a decision and took the children back the way they came, and walked outside the cave.
"Hurry back to the camp, meet Dr. A Li, and call the police." He looked at the children.
"What about you, Mr. Yuan?" Ayumi asked immediately.
"I will be guarding the entrance of the cave. It will take a certain amount of time for the police to come here. If it is really a murder and the body is dumped, and the gangster leaves the cave and escapes during the time when the police arrive, they may never be caught again."
"So I have to stay here. If they come out, I must at least see their faces clearly." Yuan Huaiyu explained.
"But... what if those people discover him?" Yuantai was worried that Teacher Yuan would be discovered by those people and something would happen to him.
"Yes! Mr. Yuan, please come with us! Or we can stay and contact the doctor and them through the detective badge!" Guangyan also hopes that Yuan Huaiyu will come with them.
"Don't worry, I'll be hiding in a hidden location and won't be discovered. Besides, even if I'm discovered, don't you still believe in my skills? At least you can run away if you can't beat me."
He urged the children to leave quickly: "But if you are here, you may drag me down, so you go back immediately!"
"...Okay." The three children looked at each other, and in the end they could only obey and leave quickly in the direction they came from.
Conan glanced at Yuan Huaiyu and pretended to follow the three of them. After running a certain distance, he stopped and shouted to the three of them: "You go back first! I'll stay here to take care of Teacher Yuan!"
After saying that, he turned around and ran towards the entrance of the cave, found a tree with a good view and climbed up.
Although Ayumi, Genta and Mitsuhiko were a little reluctant, they still obeyed the instructions and continued on their way because they believed in Conan.
On the other side, seeing several children running away, Yuanhuaiyu stretched his body on the spot and walked straight towards the cave.
"Come on, you bastards who rob banks, I haven't moved my muscles in a long time..."
He licked his lips: "I hope you can hold on a little longer..."
As soon as Conan climbed up the tree, he saw Yuanhuaiyu walking into the cave, and he was suddenly shocked.