The entrance to this col is only a few tens of meters wide, and the peaks on three sides are nearly 100 meters high. The col is about 30 meters wide, only to find a 20-meter-wide mountain road winding into the distance, where the field of vision is narrow, and we can't follow too close, and then follow the people to lose.

"Where did this guy go?" Watching Jin Yongyu almost disappear under my nose, I couldn't help but feel a little anxious.

"Let's search carefully! He won't go far. ”

I nodded, it's useless to be anxious now, I can only search slowly, if there is a map of the air defense base here, it would be good, he should have run in through some mechanism, I suddenly had this thought in my heart.

"Look for it along the cliff, and don't let it go if there are man-made traces such as broken tree skills on the edge of the cliff." I remembered the incident of finding a rebel base in Red Flame Star and reminded him.

The two searched step by step along the cliff, but they didn't see any artificial traces except for the steep rocks and the messy woods, the trees on the ground were very messy, and there was not even a road under their feet. From time to time, the branches wanted to hug us, but luckily we were wearing special jackets, otherwise the first thing we would do when we went back would have been to change our clothes.

"I'll go get the green frost! It's not easy to walk here without tools. Looking at the almost scratched hand of the Fluffy Door, I proposed, and the Fluffy nodded.

"Then you be careful, don't act alone if there is a problem!" I advised.

"Yes!" She smiled sweetly, which made me feel a little more at ease. Qingshuang we brought it on top of the snow this time, I didn't plan to use it before, but it seems that we still use it. When I returned to the place where the flying snow landed, I saw another suburban boat similar to flying snow flying over in the distance, and it was Mu Jin who rushed over.

Jamie continued to stay on the boat, and Mu Jin got off the boat and asked, "How is it, he went to the mountains?" ”

I took Qingshuang and explained the situation, and Mu Jin was not displeased, just said let's go! With Qingshuang opening the way, we quickly caught up with Flox, who was now looking up at the cliff and searching.

"Did you find anything?" I asked.

"No, but it occurred to me just now that this forest is so difficult to walk, and we haven't seen any human traces, will he climb there along the cliff." He pointed to a place on the cliff where Shang Ke could settle down.

"It's also possible that people with good skills can walk faster by climbing a few meters to avoid the trees below." Mu Jin agreed.

"Then I'll go up, you guys check below." After a few steps, she jumped up the cliff, and she found a way forward five or six meters away from us, and walked with agility. Mu Jin and I continued to search below.

The sheer cliff face was like walking on the ground for Flocculation, and she stepped on the rock as lightly as a swallow. Forward, although I have already seen her level of climbing the cliff, I am still amazed at this time. She suddenly stopped and stared at a tree.

"What's wrong?" Seeing that the fluff might find a problem, Mu Jin and I both staggered up the cliff slightly.

"What's wrong with this tree?" She blinked, as if to test us. It was an ordinary pine tree, with roots deep in the rock crevices, and only 1 branch was exposed

Meters tall, it stretches outward, and the branches have an unnatural bend. Mu Jin should have also seen the problem, and he smiled and motioned for me to speak first.

"The top of this pine tree is obviously too curved from this part to this part compared to the bottom, it must be caused by grabbing the branch while climbing, and someone must have walked here often." Mu Jin nodded, and the next scene still shocked him.

I picked up the rubble from the cliff and threw it at the cliff one by one. After a "pop" sound, the stones jumped and ran towards the tree. Mu Jin was very puzzled, but she didn't ask a question, until her eyes lit up, she knew what happened to me in Hongyanxing. Sure enough, as I expected, after throwing it more than 20 times, a stone "swished" into the arms of Mother Dashan and was not ejected.

"Found it!" I was overjoyed.

She also screamed excitedly, and she stepped on the rock, which was difficult to get under, and ran quickly towards the place where the stone disappeared, and when she got there, her whole body disappeared. In a few moments, a slender hand came out of the rock like a magician, and she gestured to us and motioned for us to come.

Mu Jin and I entered the cave, looking at the 4D projector next to the cave, Mu Jin bowed slightly, and then turned to look at me: "How do you know that they use a projector to cover the entrance of the cave?" ”

"I've been in a similar situation before!" I didn't say anything, and Mu Jin didn't ask again. He brought out two pairs of infrared glasses for us, and the three of us put them on and explored the cave together.

This cave is actually a tunnel, more than three meters wide, nearly four meters high, the walls of the tunnel are poured with a concrete lining layer, the quality of this concrete is much better than I expected, after more than a thousand years of weathering there is no sign of falling off. After a few turns, there was a gate blocking our way. The gate is 2.4 meters wide and 3.1 meters high, and the paint on the exterior has peeled off, revealing the dark metal panels inside. There are also several already somewhat blurred handwriting engraved on the panel: Base 004.

This base must be the heat of ancient times. In the Age of Weapons, a country's defense command system has become important. At that time, nuclear weapons were still the most important strategic deterrent weapons of all countries, and the corresponding defense system was that countries established air defense command systems to prevent nuclear strikes in the mountains. This air defense system is huge and has strong defense capabilities, and can withstand the close attack of millions of nuclear bombs. There are also places for thousands of people to work and live in the interior of the mountain, and it is the most important operational command department in a country after a nuclear attack. Fortunately, a large-scale nuclear war on the earth has never occurred with the joint efforts of people of human insight, and we can appreciate the beauty of the earth more than a thousand years later. The door in front of us should be made of all-metal, at least one meter thick, and it is unlikely that you will be forced to enter from the outside if you don't know how to open it.

Looking at the airtight door, we don't know how Jin Yongyu got in just now, presumably someone inside should open the door.

"Can the green frost break?" I didn't give up hope, so I asked casually.

"No, although the material of the blast door of this defense base is not as good as Q steel, it is also a high-performance metal with extremely high strength, and it may be pierced by a thickness of one or twenty centimeters, but there is definitely no way to do it with such a thick door."

Mu Jin and I glanced at each other, both

Seeing helplessness in the eyes of the other party, after almost touching the wall next to the gate to no avail, the three of them had to retreat. Mu Jin looked a little depressed and relieved: "Actually, we are not completely helpless, a stupid way is to wait here, wait for Jin Yongyu to come out and catch him." Another way is to find other entrances, there can't be only one exit for such a large base. ”

"yes!" When Mu Jin said this, my mood and that of Su Fei also improved, and Su Fei flashed her beautiful eyes and said to herself, "It would be good if you knew the structural characteristics of this kind of base, so that you might be able to find some clues, otherwise such a big mountain is looking for it!" ”

Then he exhaled deeply and said, "It's still good outside, the air is fresh, and I was suffocated just now." ”

I nodded, but it wasn't the smell of dust in the tunnel, it really didn't smell good.

"There it is!" A thought suddenly flashed in my mind, such a large base must have an exhaust system, and the exhaust system generally has a shaft leading to the top of the mountain, and we can enter through the exhaust outlet. As soon as I told Mu Jin about my thoughts, Mu Jin immediately asked Jamie to release all the small reconnaissance planes to search the top of this big mountain with all his might, and gave each of us a transmitter to wear in front of us, and we began to climb the 100-meter-high peak.

When we reached the top of the mountain, we found that a mountain was even higher, and the top of the mountain we saw before was only the tip of the mountain. Several reconnaissance planes were hovering overhead, and we were taking the time to rest, and if we found the entrance, we would be very active. I looked at the rocks under my feet and the ones I saw in the tunnel, they were all hard granite, and it would take a lot of effort to dig under this kind of mountain. It didn't take long for the reconnaissance plane to soon find two potholes at the top of the mountain, and we walked to the nearest one.

The size of the entrance of this pit is about 3 * 4 meters, the top is covered by a small house without a wall with a concrete structure, the appearance of the small house is also treated into a mountain style, and a few pine trees have grown on the surface after thousands of years of changes, if it is not for luck, a reconnaissance plane flew relatively low and found the hole on the side without a wall, and this entrance can not be found from a high place looking down. From time to time, a mist of smoke came out of the crater, but as soon as it came out, it dispersed, and the exhaust smoke could not be detected unless it was at close range.

"I Have a Catalogue of Ghosts and Gods"

The pit was not deep, it was black, like the mouth of a giant beast that wanted to swallow any prey. The reconnaissance planes entered through the two entrances, and we were also able to get a glimpse of the air defense base more than 1,000 years ago. After the reconnaissance plane descended more than 200 meters, an equally dark room appeared in front of it.

A few exhaust fan-like machines rotated softly, seeing that there was not much dust in this machine that should be cleaned regularly, there was a huge air duct on the roof of the room leading to the outside, and a blast door in the room that was much smaller than the previous entrance was tightly closed, and if we went down, we were afraid that we would be trapped inside. The same is true of the signal from another pothole.

"Jamie is sending a rappelling rope!" Mu Jin didn't have the idea of being blocked by the closed door, and immediately issued an order. Jamie soon flew up with a thin bundle of high-strength fiber rope. After fixing it, I, Floy, and Mujin descended in turn, and Jamie flew back.