"Pressure?" Yao Yilan didn't know what she meant at first, but after Tang Ding's reminder, she immediately understood what Tang Ding meant, "You mean that as soon as the entrance of the coral cave is closed, the contact with the sea water of Taiping Bay is completely cut off, and then the pressure balance here is destroyed." Originally, it depended on the pressure of the sea water at a height of forty or fifty meters to barely form a balance with the ground of this coral reef, but at this moment, the pressure of the sea water at a height of forty or fifty meters was suddenly removed, and the pressure here suddenly became smaller, and then the air pressure below broke the balance between here and the coral hole?"

Yao Yilan's explanation can be understood by anyone with a little bit of physics knowledge.

Although Ming Miaohui has never studied physical chemistry, Yao Yilan's explanation is easy to understand, so Ming Miaohui is also easy to understand.

"However, you said that this is the hinterland of the dead tripe acupoint, why is there no evil qi here?" Although Ming Miaohui does not know how to look at qi, she feels that she is still extremely sensitive after studying feng shui all her life.

"I personally think that this question should be Xuanwu at work, and it is the auspicious qi of Xuanwu that suppresses the fierce qi here. Tang Ding has considered this question for a long time, and it is precisely because of this inference that Tang Ding will go deep into this thousand-year-old fierce tomb without hesitation.

"Also, since you said we're all underwater at the moment, why is there oxygen here that we can breathe freely, and where does that oxygen come from?"

"I also feel strange about this matter, but if our previous guess is true, then this is a compressed space, air and oxygen are readily available, how this space was formed, how it got to the sea, we can't guess, maybe it is geological activities, or what special circumstances created it, this is hard to say. Tang Ding took a flashlight and shone around, "Do you need to rest for a while? ”

"Let's go together. There's something quirky here. "It's so weird here, even a cultivator like Ming Miaohui who is empty of the four is at a loss.

"Okay, let's do it together. ”

The three of them now only have one flashlight left, which is the one in Tang Ding's hand, and Ming Miaohui's flashlight was lost at some point.

I don't know if I don't go, I am scared when I go, in this dark space, it seems endless, the three of them have walked for a long time, but they haven't even reached the end, as if there is no end here.

"Let's go in this direction. Tang Ding turned around for no reason, and Ming Miaohui and Yao Yilan didn't ask much, just followed behind him.

After walking some distance, Tang Ding turned his direction again.

"Can't go any further!" Tang Ding finally stopped after turning around a few times, "Don't you think there's something weird here?"

"yes, there's no end in sight. ”

"Well, I also feel as if it's empty, nothing. ”

"It's not a feeling, it's empty. Tang Ding said affirmatively.

"Why are you so sure?"

"This should be under Taiping Bay, right? The place where we went into the water is only more than 1,000 meters away from the shore at best, even if the coral hole we came in is in the opposite direction, it is less than 2,000 meters from the shore, but if this is the dead tripe hole, then 2,000 meters here is Taiping Bay, even if we can't justify the direction of Taiping Bay, we walked in the opposite direction for 4,000 meters, it stands to reason that we should have come to the end, but there seems to be no edge here. Downing paused, "But there's another possibility?"

"Oh?

"We've been hit by ghosts. ”

"Ghost hitting the wall?" said Ming Miaohui in surprise.

"Yes, the ghost hit the wall, although we walked two thousand meters, and then we walked four kilometers in reverse, although we thought we were walking in a straight line, but in fact we did not walk in a straight line, but kept going around in circles, but we didn't know it. ”

"But we didn't turn a corner, we've been walking in a straight line?" Yao Yilan said.

"We just didn't know we were going around a corner, we just felt like we were walking in a straight line. Tang Ding looked up at the dark sky above his head, thought about it, and didn't speak for a long time.

"Tang Ding, are you talking, are you showing something?" asked Yao Yilan.

"I'm worried, but it's not been verified. ”

"Oh, what's worried?" Yao Yilan asked.

"We first went up to the shore in the water, and then we went in the opposite direction of the water, and we took it for granted that the opposite direction of the water was where the shore was. ”

Tang Ding's words reminded Yao Yilan, "By the way, what about the water? We walked back and forth like this, in the opposite direction and in the right direction, it stands to reason that we should have walked to the water's edge a long time ago." ”

"Yes, that's what I'm worried about, we should have walked so far in all directions that we should have come to the water's edge a long time ago, but now we can't find even a shadow of the water. ”

"This is the ghost hitting the wall?"

Tang Ding nodded, "This is a ghost hitting a wall, but there is also a situation that is worse than a ghost hitting a wall." ”

"What's the situation?"

Tang Ding shook his head, "Forget it, let's talk about ghosts hitting the wall, first we have to confirm whether we encountered ghosts hitting the wall?"

"How do you verify this?"

"We make a mark on the ground, preferably something that can be erected, something that can be seen from a distance. ”

"Just use this, oxygen cylinder, I happen to be tired of carrying it. Ming Miaohui unloaded the oxygen cylinder on her back and put it on the ground.

After doing this, the three of them began to walk again, this time Tang Ding took the two of them away, as usual, Tang Ding walked two kilometers south, and then turned around ninety degrees in place, but after walking another two thousand meters, the three of them saw the oxygen cylinder on the ground.

All three of them were horrified at the same time.

It stands to reason that the direction of the three of them plus the direction of the 90-degree turn should be their position after two thousand meters, and the distance from the location of the oxygen cylinder should be more than 2,080 meters.

Ghost hits the wall.

When Tang Ding went, he walked two thousand steps, and when he returned, he also walked two thousand steps. However, the only difference is that after two thousand steps after Tang Ding came back, he did not walk directly in front of the oxygen cylinder, and the oxygen cylinder was still seventy or eighty steps away from Tang Ding.

"It looks like we've really encountered a ghost hitting the wall!" Ming Miaohui sighed.

Ming Miaohui, who has studied feng shui all her life, how could she not know that ghosts hit the wall? The people who encounter ghosts hitting the wall will keep walking and walking, never finding an exit, and finally can only be trapped in the same place.

(End of chapter)

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