The outlet must be connected to the outside world, and the temperature of the water flow outside should be the average temperature of the whole lake, and the temperature will never be there, how high is it.

In other words, through this large mass of heat flow, looking for the cold current from the outside world, I am afraid that this is the direction where the exit is located.

I slowly closed my eyes under the water, focusing on every surface of my body, and in less than a moment, my eyes slowly opened.

Through the goggles, my eyes flashed two bits of golden light, and if I guessed correctly, I was now almost sure where the exit was.

Not only relying on the flow of water, but also combining the method of identifying the direction of the Bagua and Eight Gates, it shortened the scope of my search to a certain extent.

The feng shui school I learned before was to inherit the feng shui phase method of stealing the door and fighting in the outer eight elements, and my ancestral book "Ten Methods of Earth Physiognomy" has a little dabbling in the direction of the strange doors of these eight gates, but it is only a scratch of the surface.

With the lack of references at such depths, it was difficult to even discern directions, and it was almost impossible to make discoveries with just the feng shui techniques I had mastered.

However, in the past few months, I have studied some Qimen Feng Shui, and the combination of the two Feng Shui techniques I have mastered has given me an eyebrow.

As I dived a little bit, I felt that the velocity of the cold current was getting bigger and bigger, and at the same time it was getting clearer and clearer.

Then, by the light of the diving lamp overhead, I could clearly see that there was an extra cave in front of me that was not too big.

From the cave, I could clearly feel the flow of the water.

I let out a long sigh of relief, there was a flow of liquid here, which was obviously a place leading to the outside world, and if I got here, as long as the oxygen in the cylinder was not depleted, there should be no accidents.

It was only when I started diving into the cave that I realized I was wrong.

The speed of the water in the cave was very fast, which caused a lot of resistance to me, which was fine at first, but the deeper I went, the faster the water flowed, and the gas cylinders on my back and the hiking bag full of treasures hanging from the side were also a great obstacle to my movement.

It was only when I got to the middle of the room that I found that I was not in the slightest shape, and in this undercurrent of the cavern, it was as if a big hand had stuck me.

My face turned white, and the gas in the cylinder was limited, and if I couldn't break out of this cave in a short time, I was afraid that I would have to die here.

Even if you are lucky enough not to suffocate due to lack of oxygen, but are carried back to the puddle where you were originally by the current, you still can't escape death, there is no food or drink there, and you will still die if you can't last a few days.

I let out a long breath, bubbles gurgling out of my mouth, trying to calm my restless mind.

While struggling to hold my figure, my eyes searched for a moment, and suddenly my eyes lit up.

With great difficulty, I pulled a large ball of plastic film out of my back bag and tore out a folding shovel from the plastic film.

Fortunately, I had the foresight to separate the tools from the treasures obtained from the tomb and wrap them together with waterproof membranes, if they were to be wrapped together with the tools, when the tools were taken at this moment, it was estimated that all these treasures would be blistered.

Staring closely at the cave wall at the top, he quickly opened the folding shovel, kicked slightly, and quickly swam to the top of the cave.

According to my estimate, just break the rock at the top of the cave and try to block the direction of my entry with the falling rubble.

As long as this end is blocked, the flow of water will naturally stop, and even if it is not sealed, it can slow down the flow of water to a great extent.

There is only one more problem, the rocks in the cave have been washed by the water flow for thousands of years, and the stone on its surface has become extremely hard.

After scouring and polishing, the cave has no gaps at all, which is really difficult to hit, and the strength I can exert under the resistance of the water is also very limited.

Although this is a good solution, it is really not too clever a solution, after all, the success rate of this method is not too high.

When I reached the top of the cave, I found that the top of the cave was stronger than I had imagined.

The rock that made up the cave seems to be much harder than the stone used to build the burial chamber, and it really doesn't look like it could be cut down by a folding shovel.

But that's the only way I have to do it at the moment.

I half-squinted my eyes and looked closely at the top of the rock wall in front of me to see if I could find the weak points in the rock wall.

According to my estimates, I'm afraid that I will only have ten minutes at most to search here, and once I take off it for a long time, the air in the cylinder will be exhausted and I will suffocate under the water.

My eyes searched inch by inch, and when my eyes saw a certain place on the top of the rock, I froze slightly, and then a smile appeared on my whole face.

It seems that my luck is still quite good, in the upper right corner of me, there is a big rift.

The edges of the fissure are smooth, as if they had been washed over the years, but the more this happened, the more the fissure was deep into the rock face.

"Cards!"

I swung the folding spatula in my hand and plunged the sharp tip of the folding spatula into it.

As soon as I got my folding shovel into the rock wall, I could immediately feel the movement of the rock wall, and it was clear that this part of the rock wall was not particularly strong.

It is only because the surface is too smooth, so there is very little resistance when the water flows, which does not cause the stone to loosen and fall off.

My hands moved up and down quickly, stretching the folding shovel more and more into the gap in the stone wall.

The larger the stone I can knock down, the more I can reduce the speed of the water, and if the size of the stone is only a fraction of the size of the cross-section of the cave, I am afraid it will not have a great effect on the flow rate of the water.

According to my estimates, there must be at least half the size of the rock in the cave section.

As I continued to shake, the crack slowly spread along the longitudinal direction, and as the shaking began, there was a clicking sound throughout the rock wall.

My eyes grew brighter and brighter, and as the cracks grew larger, they soon covered almost half of the cross-section of the cave.

I was relieved to get here, I had only been delayed for five minutes, and it was quite late.