After a short break here, everyone happily started the return ride.

Five days later, Lone Wolf returned to YZ City, of course, he is still inconvenient to appear in public, after all, he is also an old donkey who has "lost his footing in the revolution". There were five other people who came with him this time, one of them was a technical backbone of the YZ City Geological Exploration Team, and the other three were professional underground river exploration personnel from the province.

The last one has a very special identity, and it turned out to be a senior feng shui master, which is also a lone wolf, in order to deal with the legendary ancient prohibition near the phoenix ass gate, they specially invited to assist in the exploration work. It's no wonder, because Xiao Qingfeng didn't give any explanation for the ancient prohibition post-processing in his earlier call with Lone Wolf.

After they arrived, they met with Xiao Qingfeng and the mute that night, and roughly exchanged some specific information. It's just that when Lone Wolf introduced the feng shui master to the two, the dumb man showed a little surprise, but fortunately people didn't pay much attention.

During the exchange, Xiao Qingfeng made a bold guess about the Phoenix Ass Gate and the White Horse Ancient Spring, as well as the old turtle pit in the old city, and the exploration camp between the barren mountains in the north of Xiyun Village. This point has been completely recognized by the lone wolf, especially the technical backbone of the YZ geological exploration team, who spoke highly of Xiao Qingfeng's overall view.

As for Xiao Qingfeng's speculation about the possible existence of an underground dark river under the Phoenix Ass Gate, it was also affirmed by the three professional underground dark river explorers. It turned out that the three of them had already determined from other sources of information that this extremely spanning underground river was real, and had conducted long-term tracking and exploration.

It's just that within the territory of YZ City, it has not yet been figured out its specific direction and distribution, that is to say, the relevant conclusive key points have not been found. And this time, the suspected existence of the underground dark river in the depths of the Phoenix Ass Gate shaft may be of great help to them, and they may be able to really figure out the specific direction and distribution of this underground dark river in YZ City through this key point.

In between, the lone wolf and the feng shui master invited from outside deliberately mentioned the strange ancient prohibition near the phoenix ass door several times, but Xiao Qingfeng inadvertently prevaricated with a few words. Xiao Qingfeng's abnormal performance, the feng shui master didn't feel anything, but the lone wolf couldn't help but wonder in his heart.

He vaguely felt that Xiao Qingfeng seemed to be deliberately hiding something from him, or Xiao Qingfeng was unwilling to mention this matter in front of outsiders at all. Fortunately, the lone wolf completely trusted him, and seeing that he didn't say it himself, he changed the topic according to his meaning and stopped asking this question.

Anyway, when you get to the place of the Phoenix Ass Gate, everything will be clear, and it will not be too late for in-depth communication and research.

That night, everyone had a simple meal and went back to rest. In order not to attract the attention of the public and avoid unnecessary trouble, everyone agreed to conduct on-the-spot exploration of the Phoenix Ass Gate at five o'clock in the morning of the next day.

In the early morning of the next day, Xiao Qingfeng and the seven of them rushed to the vicinity of the deep pool of the Phoenix Ass Gate early, and after waiting for a while, the lone wolf and the six of them also arrived with the corresponding equipment. Of course, after a brief introduction by both sides, Xiao Maitreya and the others asked a lot about the lone wolf about the current situation of the prodigal son.

To everyone's relief, the prodigal son has been transferred to another specialized scientific research institution, where he is receiving more professional and meticulous treatment, and has achieved certain phased results.

With the close cooperation of everyone, everyone has fully prepared the preliminary work, and is ready to officially start sending people down to the depths of the shaft under the deep pool to conduct field exploration in the real sense.

Not only did everyone choose four firm fixing points at the mouth of the pool above, but also hung down four safety main ropes, which were controlled by the four people of Dumb and Laughing Maitreya, Meditation, and Doll. A triangular bracket was also erected at the square mouth of the shaft at the bottom of the pond, and a reliable lifting device was assembled and placed, which was personally controlled by the lone wolf and the technical backbone of the YZ City Geological Exploration Team.

In addition, the specially invited feng shui master, accompanied by the Mengshan turtle and the little Taoist priest, patrolled around the upper pool, observed the surrounding environment, and was responsible for the corresponding vigilance.

After some serious discussions, it was finally decided that Xiao Qingfeng and one of the professional underground river explorers would take the lead in entering the shaft below the deep pool to conduct a preliminary inspection of the situation below; after they arrived safely at a certain location and transmitted the relevant audio, video and data, the professionals above would carry out rapid analysis and processing.

Finally, according to the results of the analysis, the next specific actions were determined, all of which were carried out by Xiao Qingfeng and these three professionals.

When Xiao Qingfeng put on the corresponding diving protective equipment and was about to start going down, the dumb man handed him his giant python bead. Of course, all the brothers understood the meaning of mute, but the people brought by the lone wolf showed a slightly curious expression when they saw this inconspicuous dark green bead, but no one opened their mouths to ask.

Because they had already had a certain understanding of everyone through the lone wolf before, they knew that these people were all folk aliens with unique skills. Xiao Qingfeng didn't take the initiative to say some things, so of course it was inconvenient for them to ask more, so as not to touch the quirks of these strange people and make everyone unhappy.

After Xiao Qingfeng solemnly put the python bead close to his body, he flew directly from the mouth of the pool above and jumped directly to the square mouth of the shaft below, and then slowly landed down the bottom of the shaft along the main rope hanging from the lifting device. Immediately after that, the professional underground river explorer also followed behind him and cautiously began to land.

In everyone's nervous waiting, after more than 30 seconds, the professional underground river explorer finally used the walkie-talkie below, and said excitedly: "I have reached the bottom of the shaft, and there is indeed a conjectural underground passage below, and there is still a certain amount of flowing living water at the bottom of the passage. ”

As he spoke, with the help of Xiao Qingfeng, he quickly sent some relevant data and images to the top: the depth of the shaft is thirty-two meters, and the wall of the shaft is full of extremely slippery limestone, but as the depth deepens, the color of the stone wall gradually increases, from the dark green at the beginning to the dark blue.

The four and a half meters above the beginning of the shaft are roughly regular square wells, and the four and a half meters below are irregularly shaped wells, and there are some abrupt edges and corners on the wall of the shaft at the depths below. At the bottom of the shaft, the space suddenly became much wider, and the diameter of the shaft changed from sixty or seventy centimeters above to more than two meters.

Under the strong light of the headlamps of the two people, a deep east-west channel with a height of seventy or eighty centimeters and a width of one meter three or four suddenly appeared. On both sides and at the top of the passage, there are still irregular limestone rock walls, and the bottom of the passage is roughly uneven and concave.

In addition, the two of them were breathing normally underneath and did not feel any particular discomfort. It's just that the humidity below is very high, and the chill is very heavy, and you can feel that there seems to be a certain cross wind in the passage below, but the wind speed is not large.

In the flowing living water from west to east below, no living creatures were found for the time being, and the amount of flowing living water was not large, the depth was only about 20 centimeters, just below the groove at the bottom, but the water temperature was low and a little cold.

After getting their exact data and images, everyone above couldn't help but cheer, and now everyone can basically assume that this east-west horizontal passage should be an underground dark river. After a brief exchange, two other professional underground river explorers also descended to the bottom of the shaft.

The four of them discussed again below, and decided to conduct further in-depth exploration of the underground river running east-west below to obtain more valuable data and video materials.

The four of them carefully checked their respective equipment, and used professional instruments to do the corresponding safety inspection of the underground river, and then began the formal in-depth exploration.

Based on experience, they first chose to go down the river to the east, so that in case of some unexpected situations, they could quickly react and retreat quickly. In addition, since the height of this underground river is only seventy or eighty centimeters, everyone cannot walk upright in it, which makes it very difficult to retreat quickly in an emergency.

Therefore, it was decided to send only two of them, with a slender but extremely solid safety rope, and to crawl into the depths. The remaining two remained in the relatively wide space at the bottom of the shaft to provide them with the necessary safety protection.

The most important thing is that they stay in this place, and when the water above suddenly increases and the flow rate suddenly increases, they can at least make an emergency interception, and assist the two people who are deep to withdraw quickly and safely.

After everything was arranged, Xiao Qingfeng and one of the skinny professionals began to go down the river to the east. Because Xiao Qingfeng's internal kung fu is superb and his body is extremely flexible, he almost bears all the weight when the two of them are marching deeply, and vigorously cooperates with the professional in front of him in the back.

And this skinny professional, although he has no real kung fu in his body, may have been trained for a long time, and he is extremely clean and neat when he travels in this low underground river.

More than twenty minutes passed quickly, and the two of them also traveled about six or seven hundred meters quickly. Seeing that the safety rope was almost exhausted, Xiao Qingfeng reminded his companion in time, and the two began to turn back.

In the middle, the two also accidentally found and caught a special fish that was almost translucent, this ultra-thin fish of about ten centimeters, which made the two excited again.

The two of them carefully searched the water under their feet and the surrounding rock walls, thinking about whether they could make any other unexpected gains, so that the speed of their return slowed down. Just when the two of them walked more than 200 meters away from the shaft, suddenly several sharp urging voices came directly from the intersection of the shaft: "Hurry, hurry, hurry up and exit......"

As soon as this voice fell, Xiao Qingfeng and the others heard a very strange sound. Before the two of them could react, they suddenly felt a slightly fishy cold air rushing from the upper reaches of the underground dark river. Immediately after that, the cold clear water that filled almost the entire underground dark river rushed directly from the west of the upstream at a very fast speed, and suddenly came to the front of the two of them.

Xiao Qingfeng saw it, and secretly said in his heart that it was bad, and he knew that he was in a dilemma: if he went upstream, it would be difficult to perform his original light body kung fu in this kind of low and narrow underground passage, and he would also have to take a person to face the extremely fast underground undercurrent, which could almost be said to be difficult to move an inch;