"No problem, at the current distance, it should definitely be fine. Try walking towards where you found the water source earlier and see if you can discover anything."

As he spoke, Ye Chen nodded and then walked straight into the jungle.

From this angle, he could still see the tents, so while he was exploring here, suddenly, he heard a beeping sound from his detector.

After hearing all this, Ye Chen stopped immediately.

During the previous explorations, he hadn't heard any sound. But now, hearing the sound, could it be that something really has been detected?

"So, did you find anything?"

"Stop now. There should be something around you, but not at this exact spot. However, remember, it should be within 2-3 meters of you, don't go beyond this distance, and don't exceed this range."

"Alright, got it."

No wonder Anying didn't instruct him to stop in time earlier; she had only detected a general area. So, once they left this range, the beeping might stop altogether.

Ye Chen moved gingerly in his current location. He had been moving over a large area earlier, but now, he had reduced his movements to a significantly smaller range.

"Stop."

Right at that moment, Ye Chen suddenly heard Anying shout from the other side, and Ye Chen immediately stopped and placed the detector on the ground.

"Well, did you find anything?"

"Place the item there, and then come over; I want to tell you something."

Excitedly, Ye Chen ran over, and at that time, he saw a red bar appearing on the screen, continuously moving across it.

"What is this?"

"This is what you call underground water. Who would have thought there'd really be an underground river here?"

"What? A real underground river? Then how far is it from the ground?"

"Measuring it like this, I estimate the distance is at least over 100 meters."

"What? Over 100 meters? Could it be that our previous estimations were mistaken? We assumed it was within 100 meters, but now it seems to exceed 100 meters."

"Over 100 meters, that's a certainty. Moreover, it's at a very deep level. The spot where you saw the spring water gushing out is likely connected to this underground river. Do you see it? The trajectory of the underground river seems to run north to south."

"Besides these, did you find anything else?"

"No, I can only see this much now. Everything else around here appears relatively normal."

"Our deduction seems to be correct. It looks like there's indeed a deeper space down here. With this, I'm gaining more confidence; perhaps there's really an open area beneath this swamp."

"Yes, if you put it that way, I do feel it might be the case. Perhaps we should give it a good try. Alright, bring that item back. Since we've seen this, there's no need to investigate further for now."

Finished speaking, Ye Chen nodded reassuringly and quickly stepped forward to retrieve the item.

"By the way, can we deduce the time of high and low tides every day?"

"There's no need to deduce; we roughly know the timing. However, after the tide goes out, the swamp won't immediately sink, and a cycle needs to form. By the way, what time did this happen last night?"

"Last night, it happened around, oh, I remember, at about 1 a.m., yes, a little after 1."

"Around 1 a.m., if we calculate using yesterday's high and low tide times, the tide should have started going out around 10 p.m. last night and taken about an hour to complete, meaning it should have finished receding around 11. Two hours later, the swamp started sinking, right?"

"That's right, that's what it means. So what about tonight?"

"Tonight, it should still be around this time. I estimate it will occur around 1 a.m. again with not much deviation."

"Alright, since our timing is locked, and the basic location identified, it looks like we'll need to stay here tonight to see the situation."

"Moreover, if we confirm an underground space exists, how do we get down there?"

This question left Ye Chen momentarily troubled. He glanced around, noting the surroundings were empty, and there were indeed big trees if they walked further.

"Did you bring any ropes?"

"Ropes, yes, I have some. But the main issue is, are you sure you want us all to go down there?"

"We can imagine if, back then, someone hid here, how did they manage to send people down? If they had to send people down, there must have been some equipment."

"It would need large equipment, using a lever principle where machines could effortlessly send people down. But since we temporarily landed here, we lack such equipment."

"There's no helping it; the best method might still be the most primitive. Just tie the rope to a tree, secure the other end around our waists, and we can slowly descend one by one."

"But there's one thing I need to tell you. The rope I brought is about 30 meters long, so the distance we've estimated to descend is about 15 meters. If it goes past 15 meters, the length of my rope might not suffice."