readx; This plan is not complete, and the routes shown are all already detected by the outposts, and the blocked passages are among them. www.biquge.info However, the three passages leading to the mine have been blocked by boulders, so that the flat map can only be used as a reference, and the passage into the mine will have to be re-explored.

Everyone studied the floor plan and found that there was an open field about 0 meters along the original channel, and of course this open land had been flooded by the underground dark river, forming a small lake.

The map shows that there are several passages around the open field, skipping the blocked passages, and several more passages have been explored, but at the end of these passages is a rock wall that is not known how thick it is, and it is impossible to move forward.

As for the other passages, there are no ends, but the depths of the passages extend in all directions, there are many forks, and the area detected is only a small part, how deep are these passages, and where do they lead? It is not clearly marked on the map.

Ning Xiaofan and others studied it, and chose two passages, these two passages have no end, most of the areas are shown with shadows, indicating that they have not been detected, fortunately, the direction of the mine is the same, if you can find the exit, I believe that even if you deviate from the mining area, the distance is not far away.

After discussing the route of travel, Lao Wang and Xiao Shanzi came in with a large wooden box, and at the same time, the prospecting team composed of foreigners also carried a large wooden box.

The two prospecting teams were in the same board room, perhaps because of the competition, and the two sides did not communicate verbally, but only looked at each other secretly. And Aunt Xiang, as a beautiful woman, naturally has an extraordinary attraction, and the eyes of several foreign men are always on Aunt Xiang's beautiful face, and the ** in her eyes can't be concealed at all.

Ning Xiaofan noticed the covetousness of the foreign men for Aunt Xiang, and felt unhappy for no reason, but this outpost belongs to a safe area, and it is strictly forbidden to use force, Ning Xiaofan is not good at attacking, so he can only suppress the unhappiness in his heart.

The large wooden box contains a complete set of diving equipment, such as breathing apparatus, air tanks, diving suits, frog feet, eye masks, etc., and everyone has a set.

After receiving the diving equipment, the people first packed the backpacks, weapons and other things they carried with them in waterproof bags, and then carried out vacuum compression treatment, and then entered the temporary changing room converted from the board room to change the diving equipment

When everything was ready, Ning Xiaofan and Aunt Xiang walked towards the dark river under the guidance of a resident staff member.

Before going into the water, the staff asked Ning Xiaofan and the others if they could dive, and if someone couldn't, they would have to conduct simple diving training

Ning Xiaofan, as a blasting expert, has worked underwater, and is no stranger to diving, and Aunt Xiang has been in overseas mercenaries, diving is a necessary subject, so naturally there is no need to retrain丨 What surprised Ning Xiaofan was that the fat man, Hou San, Zhang Chun, and Chen Biao, the four guys who were not very in tune, could also dive, which made him impressed.

In addition, Yang Hai can also dive, only Lao Wang and Xiaoshanzi will not.

The staff immediately beckoned Lao Wang and Xiao Shanzi to the front, explained the way of breathing in diving, precautions, etc., and at the end, he personally went into the water to do a demonstration, and then called Lao Wang and Xiao Shanzi into the water to get used to it, it took less than a minute before and after, and this diving training was over.

Of course, this underground dark river is not as good as the sea, the hydrology and geography are not complicated, and there is no undercurrent or undercurrent or anything, the danger is not great, Lao Wang and Xiao Shanzi can go into the water after this simple training丨 can dive into the water, plus there is also a hand-held power booster, and there is no need to worry about the two of them not being able to keep up with the team.

After Lao Wang and Xiao Shanzi barely got used to diving, at this time, they saw that the prospecting team composed of foreigners also came to the water's edge. The foreign men were located on the side of the flooded passage, and the foreign men seemed to be able to dive, and when they reached the water's edge, they went straight down to the water and soon disappeared.

Ning Xiaofan glanced over there a few times, frowned and asked the staff member, "Excuse me, which route did those people take?" ”

The staff member replied: "They are different from the route you take, there is only an underwater passage less than a meter long from here, and there is an underwater monitor installed at the exit of the channel, they dare not mess around, out of that channel, it is open water, and there are many channels under the water, you only need to enter the pre-selected channel, you don't have to worry about meeting them." ”

Ning Xiaofan smiled noncommittally, he wasn't worried about meeting those guys underwater, as far as he was concerned, even if he did, it wasn't certain that the deer would die, he just didn't want to be on the way to the exit from the mining area.

For the sake of safety, Ning Xiaofan planned to wait for a while, and by the way, let Lao Wang and Xiao Shanzi familiarize themselves with diving skills.

didn't wait long, Ning Xiaofan saw a flashlight faintly penetrating through the entrance of the passage into this outpost, and then saw that a staff member not far away turned on the flashlight and shone towards the entrance of the passage, and it was estimated that another prospecting team had arrived.

The new prospecting team was about to arrive, and Ning Xiaofan naturally didn't want to meet the team with unknown friends and enemies, so he decided not to wait any longer, and immediately called everyone into the water.

Going down to the water, because there was still some distance from the entrance of the passage, Ning Xiaofan and the others swam in their sleep for a while, until they reached the entrance, and then they swooped down.

The whole body was submerged in the water, Ning Xiaofan turned on the overhead light, and then started the underwater booster thruster, with a slight motor sound, Ning Xiaofan took the thruster and dived towards the passage first.

With the help of thrusters, you only need to keep your body balanced to move forward quickly, even if everyone carries a lot of weight, they don't feel the slightest effort, and soon, everyone has left the passage one after another.

After the passage, the water became wider and clearer, Ning Xiaofan looked around, and under the light of the overhead lamp, he could clearly see the scenery under the water. At this time, Ning Xiaofan was surprised to see that there were many aquatic creatures in this water, groups of small silver fish were wandering around, flickering and gathering, suddenly scattered, and even, there were plankton large or small, similar to jellyfish swimming and floating not far away.

Looking up at the water, you can vaguely see the uneven dome, and even, you can see a lot of stalactites hanging upside down in the water, and these strange-shaped stalactites reflect colorful light under the illumination of the light, magnificent and gorgeous, dazzling.

The underwater world is certainly beautiful, but, as Chen Li said, this wide area has been completely submerged by the underground river, and there is not even a space to surface for ventilation.

Ning Xiaofan and the others are equipped with sea submersible air cylinders, according to the water depth data detected by the outpost staff, the deepest water area reaches 50 meters, and the entrance to the channel selected by Ning Xiaofan is about about one meter underwater, excluding the influence of water flow and the influence of water depth, the oxygen supply of the air cylinder can be maintained for about an hour.

Then, Ning Xiaofan and his party must find an exit within an hour, or find a place to stay. This time can't be pinched too accurately, after all, there are still two diving rookies in the team, Lao Wang and Xiao Shanzi, and there must be at least a few minutes or so left, otherwise this team will be wiped out if it doesn't work well.

Fortunately, Ning Xiaofan learned from Chen Li that although all the passages leading to the mining area were flooded by the dark river, there were still some higher places in the passages, and it was not difficult to find a place to rest and breathe. It's not easy to find an exit, and according to Chen Li, it's best to be able to find an outlet before the air tank runs out.

Entering this water, Ning Xiaofan didn't dare to delay too much in the water, roughly identified the lower direction, and dived the thruster in the direction of the pre-selected channel.

Sneaking all the way, soon, an uneven rock wall appeared in front of me, and after diving along the rock wall for a while, a dark cave came into view.

The diameter of the cave was about two meters, and when Ning Xiaofan and his party arrived at the cave, they faintly felt a suction coming from the entrance of the cave, and there seemed to be an undetectable flow of water around them.

Feeling this suction, and the flow of water, Ning Xiaofan was slightly happy in his heart, the suction means the direction of the water flow, indicating that this cave is not blocked, but figured out.

It is not known if this cave can lead to the mine? But the channel that was chosen in advance should have been the right one.

Everyone rushed into the cave with the help of thrusters, and the cave was deep and winding, and it was extremely dark, if you turned off the overhead light, you would definitely not be able to see your fingers, not only that, but the water temperature in the cave was also much lower, and even the water creatures were nowhere to be seen.

After more than half an hour of sneaking through this deep and dark cave in the water, this cave not only has many forks, but also gives people a bottomless feeling.

Moreover, Ning Xiaofan and the others had already dived to an area that had not been explored, and when there was a fork in the road, Ning Xiaofan and the others did not dare to change the route easily. You know, these forks lead in all directions, and there are forks in the forks, and God knows where they lead? can only honestly identify the main line of the cave sneak.

With the passage of time, most of the air cylinders carried by the people have been consumed, the exit still does not appear, and the cave still gives people a feeling of no end, not only that, but the excessive forks in the cave cause the water flow to disperse, and the feeling of suction and water flow has almost disappeared.

According to the speed of the thruster, it is estimated that it has gone about dozens of miles deep into the cave, is it the wrong way? Or is there no exit to this cave at all?

However, Ning Xiaofan knew in his heart that anxiety would not have any effect, and anxiety would only cause shortness of breath, and in this way, the consumption rate of the air tank would increase dramatically.