About 200 meters into the tunnel, the slope of the tunnel began to steepen upward, and the water was gone, but the tunnel began to become very smooth, and the tunnel walls were covered with moss, and as long as they stepped on it, they would slippery, but fortunately the slope was not too large, otherwise they might not even be able to climb up.

Further up, the tunnel began to become complicated, it began to make left and right turns, but there were still no branches, Xia Qing told them that the tunnel should already be under the ancient city, so the corners appeared because they wanted to avoid the foundations of some buildings.

Sure enough, after walking like this for more than half an hour, some small openings began to appear on the left and right sides of the tunnel roof, these openings are not big, the diameter is about half a meter, Xia Qing looked at these holes, and analyzed that these are branch pipelines for rain and sewage drainage, which should be directly connected to the ground of the ancient city, and if it rains, it will pass through these branch lines and discharge the rainwater out of the ancient city.

Although Gao Chao and the fat man did not understand these things, they also felt the wisdom of the ancients, to know that the ancient city above their heads was built about 4,000 years ago, and the people who lived in that era had what kind of civilization they had.

Moving on, Tunnel 2 finally branched, and now the slope has eased a lot, and just a short distance ahead, it has divided into four lines.

Four lines lead in four directions, and the diameters of the openings are also very different, the widest is four meters, and the smallest is only about one and a half meters, and they are all at a loss when they stand at such a fork in the road.

The fat man held the torch and said, "It's bad now, I have a phobia of choices, you guys hurry up and choose one, which way are we going?" ”

Gao Chao and Xia Qing were also a little embarrassed, but Gao Chao thought of something, and then said: "Let's look for it separately, if it was the tunnel that those people entered back then, they would definitely leave some clues, mainly to see if there were any bullet shells on the ground." ”

Xia Qing said: "The people of the 101 Institute must have done a lot of work here, they must have entered every tunnel, but in the end they may only find one tunnel that can be entered, so they will definitely leave marks on the wall, or in some places, I think we should not only look for bullet shells, but also pay attention to the traces on the wall." ”

So the three of them acted separately, and the fat man naturally ran into a tunnel more than four meters wide, he didn't want to drill the hole of one meter and a half, and the narrow one was of course left to Gao Chao.

It turns out that things are always like this, and the more you worry about happening, the more it will happen.

Gao Chao drilled into the one-meter-five tunnel, he squatted on the ground, lit it with a torch, carefully inspected the situation in the tunnel, and found the bullet casings not far from the mouth of the tunnel, the bullet casings were very dense, as if someone had been shooting here for a long time, and then he just wanted to report his findings, but found a striking sign on the wall, on which were written a few words: to the ruins.

Gao Chao sighed helplessly, then squatted and turned around, and shouted outside the cave: "Don't look for it, come here!" ”

The fat man and Xia Qing, as well as the three of Gao Chao, squatted in the tunnel of only about one meter and a half, the fat man was panting very hard, and the three of them looked at the handwriting on the wall of the cave, although it has been twenty years, but the handwriting marked with special red paint is still so eye-catching.

"To the ruins?" Xia Qing read those four words, as if he was a little surprised, and as if he couldn't believe it.

Gao Chao looked at Xia Qing and couldn't help asking, "Xia Qing, where is the ruins?" ”

Xia Qing shook his head and said, "I don't know very well, the appearance of Guixu here may just be a code name, because the meaning of Guixu does not apply here." ”

Gao Chao wondered: "Why doesn't it apply here?" ”

Xia Qing looked puzzled, so he had to explain: "Guiru only exists in ancient legends, it roughly means the bottomless valley in the deep sea, the place where all the rivers, lakes and seas in the world converge, the earliest source of this word is the "Classic of Mountains and Seas", which mentions 'the country of Shaohao',' The water accumulates into an abyss', which is the Guixu outside the East China Sea, a bottomless ocean giant hole, and in the view of the Taoist Liezi in the later Spring and Autumn Period, he has a different view of the Guixu, the so-called Guixu, refers to the origin and annihilation, so there is a distinction between the East Ruin and the West Ruin, and' The meaning of the word 'ruin' in ancient times is not single, it has both the meaning of the big mound and the meaning of the big gully, so the academic community generally believes that the West Ruin refers to the ruins of Kunlun, and the East Ruin refers to the ruins of the East China Sea. Guiruin', and the ruins of Kunlun, refers to the place where all things are destroyed, that is, the place where the sun sets in the west, so there will be two ruins in the east and west, coincidentally, this is also in line with the scientific argument, all life originates in the ocean, and ends in the Kunlun Mountains in the high-altitude oxygen-free zone, so now look at the mark that appears in this channel, I can only say that it is not suitable for here, after all, this is just the Gaoligong Mountain area on the Hengduan Mountains, and the Guixu is not close to the edge at all, even if it is to be discussed with the West Ruins, but here is still a long distance from the Kunlun Mountains, how can it be marked with the ruins？ ”

Xia Qing explained "Guiru" clearly in one breath, but the two people in front of her were already stupid, and the fat man was stunned for a moment, and he still didn't figure out what Guiru was.

Gao Chao only understood a little, so he had to nod his head at the moment, pretending to understand: "Well, it's indeed a little inappropriate for Guiru to be used here, but ......" He touched his chin and continued: "But since someone wrote it here, there must be his reason, do you remember what was painted on that mural, if I'm not mistaken, it's on the far left side of the mural, it seems to be a blue ocean, I don't think this Guiru refers to that blue water?" ”

Although Gao Chao just thought of where to say, but at this moment, Xia Qing was reminded by Gao Chao like this, and was stunned for a moment, and then she pondered: "If that piece is also called Guiru, it is very possible, but the ruins represent the big mound, that is, the mountains, which is a bit unlikely, and the other meaning of the ruins is the big gully, that is, the abyss, could it be that there will be an abyss in that water?" But what does it mean that the return to the ruins represents the origin? ”

Xia Qing fell into contemplation again, although Gao Chao on the side was not thinking, but this head was given by him, and the fat man saw it, so he had to gently push Gao Chao and give Gao Chao a look.

Gao Chao understood and knew what the fat man meant, so he quickly interrupted Xia Qing's train of thought and said, "Xia Qing, or ...... Otherwise, let's go ahead and take a look, if you think about these words now, you may not be able to come up with a result, maybe the water is ahead, and we will know at a glance when the time comes. ”

Xia Qing nodded, Gao Chao was still in front, and the three of them followed the tunnel, which was only one meter and a half in diameter, and touched the depths.