This made the five people feel a lot more relaxed, and they had a chance to rest, but they were still tense.

This process lasted for about half an hour, and Xiao Yang at the bottom suddenly screamed: "Boss, Miss Lin, Mr. Bo, we seem to have reached the bottom!"

Several people immediately controlled themselves to slow down and stop.

Previously, in order to ensure that there was time to react in case of an accident, several people kept a certain distance from each other, which came in handy now.

After stopping, Kate asked, "What's it like down there? Is there an exit?"

Lin Wu also looked down, but unfortunately Kate and Zhang Shan's height blocked her view, so she couldn't see anything.

There was a rustling sound, and it sounded like Xiao Yang had found a more convenient position and was groping for something.

Zhang Shan urged him to speak quickly.

Xiao Yang hesitated and said, "There is an exit. It seems to be a trap door. There is a lock on the door in the shape of a toad, but I searched for a long time and couldn't find the keyhole."

"Don't you see the keyhole? What kind of lock is that? Why don't you try to break it with a gun?" Zhang Shan said directly.

Lin Wu and Bo Yuting above did not see the appearance of the lock and did not know what was going on. When they heard it, they did not say anything and agreed to this simplest and most brutal method.

Xiao Yang thought so too and found his gun.

Just as he was about to load his gun, Kate seemed to remember something and suddenly said, "Wait, you can't use the gun!"

"Ah? Why?" Xiao Yang asked puzzledly.

Kate thought for a moment and said, "You didn't see the keyhole, maybe because it's an ancient lock and the keyhole is basically hidden. So, you guys come up and I'll go down and take a look. I should be able to open it."

Xiao Yang and Zhang Shan responded after hearing this, and Zhang Shan switched positions with Kate first.

But it was not easy for two grown men to switch up and down in such a narrow passage, and it took them a long time to succeed.

Lin Wu looked at their actions and said, "I remember that Mr. Kate has lived abroad since he was a child. I didn't expect that he knows about ancient locks?"

Kate was switching with Xiao Yang while distractedly replying to Lin Wu: "It's just a personal hobby. Besides, when you're out and about, the more you know, the less you'll be short of money when you need it in the future."

Bo Yuting, who was at the top, heard this and heard the noises. He judged that Kate had already exchanged with Xiao Yang. He suddenly asked, "Mr. Kate, after taking a look, are you sure it is an ancient lock?"

Kate, who was below, took a closer look and did not mind explaining to them, "It is indeed an ancient lock. This lock is very special, a mixture of two types, a three-opening reverse zipper lock. Specifically, you have to turn the toad's surface over first, and then use the mechanism hidden in the toad's mouth to unlock the outer surface, revealing the three layers of core locks inside. Then you can unlock this one to fully open it."

"It's made very intricately and delicately, and its shell is very hard. The bullet may not be able to break it, but it will definitely destroy the mechanism inside it. Then it will never be opened again, and we will be trapped here."

Xiao Yang said in surprise: "Such a troublesome lock... but there is no way to find the keyhole inside? We don't know where the key is."

"This type of lock does not require a key. You just need to unlock the three layers of mechanism locks inside to open it." Kate replied.

Bo Yuting above suddenly said, "From what you said, this lock should be very small, right? Mr. Kate, can you see it clearly?"

Kate was concentrating on checking, and replied without hesitation: "It's okay, I have a magnifying glass."

After hearing this, Bo Yuting stopped talking.

Lin Wu immediately understood what Bo Yuting meant by asking, and she immediately asked, "Why do you bring a magnifying glass with you when you come down to the mine? Aren't the equipment we use arranged uniformly? Mr. Kate prepared a magnifying glass for himself, is it also out of personal interest?"

Kate below paused.

After a moment, he continued to unlock the door and patiently explained, "This time it's not because of my personal preference."

"I am the person in charge of the mine. Sometimes I also have to check the composition of the rocks and watch the experiments. The magnifying glass is just a necessary tool."

After Kate finished speaking, Xiao Yang and Zhang Shan above started talking.

"That's right, our boss has worked so hard!"

"In the past, he was very busy every day, with very little time to rest. He basically did all kinds of things and knew a lot of things."

Having said that, the two of them were simply full of admiration for Kate.

Lin Wu and Bo Yuting only hummed in agreement and said nothing.

It was obvious that the ancient lock was difficult to unlock. Kate spent a full twenty minutes unlocking it. With a light "click", he heaved a sigh of relief and said, "Okay, it's unlocked. You can go out now."

But before anyone else could say anything, his suddenly serious voice rang out again.

"If they can use this kind of ancient lock, it means that the place you see after you go out will not be ordinary, and it may be very dangerous. Everyone, be careful and don't take it lightly!"

Xiao Yang didn't take it seriously: "Boss, we encountered a lot of dangers ahead. How much more dangerous can it be?"

"Yes, boss, please open it and get out. I'm feeling suffocated in here and I urgently need to get some fresh air!" said Zhang Shan.

Lin Wu heard Kate sigh below, took off the ancient lock and put it aside, then opened the small trap door.

However, he did not open it all at once. Instead, he opened a crack and shone the flashlight down to take a look.

After a few seconds, Kate spoke up: "It seems to be a closed space down there, and I haven't seen anything strange yet. But we seem to be on the ceiling, at least three or four meters above the ground. Let me find a fixed point, and we'll go down along the rope."

All four of them said yes.

Kate opened the trapdoor, took out the rope from her bag, tied it to the trapdoor to use as a fixed object, and he went down first, landing on the ground in a few seconds. After a while, he reminded him that he could start going down.

Xiao Yang and Zhang Shan followed closely behind.

Then there is forest fog.

When Lin Wu was about to go down, Bo Yuting suddenly stopped him.

She looked up, "What's wrong?"

Bo Yuting lowered his voice and said meaningfully, "Follow Kate closely, don't go far away from him. You should be safest next to him."

Lin Wu understood that Kate was really strange, but he couldn't tell why.

He even brought a magnifying glass with him when he went to the mine, but they didn't come down to measure the quality of the rocks, so what was the point of bringing a magnifying glass? Unless he was sure that it would be useful.

That is to say, it is related to the real purpose of their coming here.

"Ms. Lin?" Kate called her from below, her voice full of worry: "Why haven't you come down yet? Is there something wrong?"

"I'll be right down."

Lin Wu responded, pulled Bo Yuting to reassure him, and then jumped down.