Lu Chen guarded the entrance of the cave for three days, during which time, he threw a steel ball into the hole, but although the hole seemed to be vertically downward, it had some angles about ten meters below, and the steel ball seemed to be stuck by something like glue on the side wall, and it did not fall to the bottom at all.

Lu Chen was even a little curious and wanted to go down to take a look, but the gelatinous substance on the side wall exuded a stale smell, and Lu Chen felt a little disgusted, so he didn't go down by himself.

……

Finally, a transport plane arrived with the order given to Nangong Muxue and some equipment from above.

There are not only reconnaissance robots, but also a terahertz scanning radar. This radar is a very advanced radar, a radar that can see through, "seeing" people and objects inside buildings or even underground bunkers from the air.

In addition, there are a lot of special equipment, the most important of which is a box of super bombs.

Super bomb is a more popular saying, the most powerful conventional bomb in Huaxia should be the N2 bomb, the high-energy material is the all-nitrogen anion salt, which should be the most powerful explosive in addition to the nuclear bomb, with the power comparable to the nuclear bomb, but there is no radioactive contamination.

Originally, Nangong Muxue mentioned in the report that this thing would be used to destroy this forest as a whole, but for various considerations, although it was decided to destroy this place, the guy sent it was not an N2 bomb, but a high-performance bomb, although the power was also between Niu A and Niu C, but it couldn't do one to raze this place to the ground, so a total of six were sent, which were placed in a sealed box, and the password to open the box was sent to Nangong Muxue through other channels.

Lu Chen looked at the box and said with a smile: "It seems that it is very important to pay attention to it." It's not as powerful as the N2 bomb, but it's still very violent!"

Nangong Muxue pulled Lu Chen to the side and said in a low voice: "The meaning above is...... Destroying this is a last resort, and hopefully we can find the bodies of the missing people, or find out the cause of their deaths. ”

"Damn...... It must have been eaten, and this is still a question. Lu Chen's heart moved, and asked, "The dead person can't have any identity, right?"

Nangong Muxue nodded, "It can't be said that there is any identity, one of the agents made a second-class meritorious service half a year ago." ”

"......" Lu Chen was a little speechless, "Okay, there must be an explanation for the death of a hero." That...... Let's check the hole first. I took the time to go to the third floor, and the door was closed well, and the stairwell didn't look like something was passing by. ”

"It's weird, I've been wondering what that trail is, but I can't figure it out. ”

"I think you should first think about where this came from. ”

Nangong Muxue was stunned for a moment and asked, "You found it?"

"I'm just guess......ing," Lu Chen said, "Don't you think our maze diagram is a bit strange?"

"Hmm...... It's strange...... Nangong Muxue said, "The third floor is not like that place, I guess the entrance to the labyrinth may be somewhere on the third floor." ”

Lu Chen shook his head and said, "I can't find it!"

"Isn't the labyrinth here?"

"It's here, it's just that the entrance has nothing to do with this warehouse...... Lu Chen said, "This warehouse, whether it's above ground or underground, is not connected to that labyrinth." ”

"Why do you say that?" Nangong Muxue asked.

"You take a closer look at this map...... Lu Chen spread out his map and said, "Look at the location of these entrances, and the passages and corridors above have no correspondence at all. And...... Let's assume that the area of this labyrinth is the same as the current underground warehouse, and you can estimate how big the labyrinth's rooms and passages will be according to the scale. ”

Nangong Muxue looked at the map, pondered for a moment, and couldn't help frowning, "No! The passage is only about twenty centimeters wide, it can't be so narrow!"

"yes...... Therefore, the area of the labyrinth is much larger than the warehouse above...... It's at least five times the size of the warehouse!" Lu Chen shrugged, "Maybe our camp is directly above that underground labyrinth." ”

"That'...... Where do you think this entrance will be?" Nangong Muxue said.

"Isn't it supported by terahertz radar? Lu Chen asked, "How deep can this thing see?"

Nangong Muxue said, "If the soil is used, it can penetrate thirty meters. ”

Lu Chen snapped his fingers, "Good thing, get it to the bottom of the elevator room and scan it, I guess the entrance and exit should be somewhere around our camp." ”

"Isn't it the big hole?" Nangong Muxue said.

Lu Chen shook his head, "No, that hole is more than ten meters vertical, and it's not an elevator, who would make the entrance and exit like that." That's right...... Did the Scout Robot send it? What model?"

"Robot snakes, small all-terrain reconnaissance vehicles, and a miniature reconnaissance aircraft. Nangong Muxue said, "The robot snake and the reconnaissance plane can enter that hole, and the reconnaissance vehicle continues to reconnoiter on the third floor." ”

Lu Chenmo rubbed his chin, "It seems to be a high-end product! I have to take a good look...... Maybe my company can come out. ”

Nangong Muxue shook her head, "You private enterprises can't imitate it, and the manufacturing materials of this thing can only be manufactured by military factories." ”

"Find another way, don't underestimate the creativity of our private enterprises!" Lu Chen smiled, "Do you want to start now?"

"The technician is preparing, and there is still half an hour to go. ”

……

In addition to being covered with all kinds of "black technology," the most important thing about using this kind of high-tech reconnaissance equipment is actually communication.

For example, the robot snake can go to many holes that humans can't enter, but after it enters, how to quickly transmit back the detected things is a very sophisticated thing. If you only expect to get the data when this thing comes back, then there is no way to use it in a high-risk environment, after all, in a high-risk environment, this reconnaissance equipment is likely to be destroyed halfway before it comes back.

Electromagnetic waves can hardly propagate underground, and the terrain below is likely to be very complicated, and it is technically difficult to transmit with optical fibers, so technicians set up a high-power communication antenna at the entrance of the hole, and put several wireless repeaters in the load of the robot snake.

In this way, when the wireless signal weakens to a certain extent, a relay antenna can be placed to increase the communication distance.

The size of the robot snake is not small, the body is segmented, the diameter is larger than the adult calf, and the length is more than one meter. It is said that it is a robot snake, but it is not quite like a snake, but like a fat meat worm, and the head of the snake is arranged with a photoelectric sensor, which can transmit what it "sees" to the control end in real time.