On the top of the passage, there is a faint layer of mist, stretching all the way to the front, I don't know where it leads, we have walked in this passage for about half an hour, at our current speed, we have walked at least five or six kilometers, but we still do not see any changes in the passage.

Just when everyone was grinding into a temper, thinking that they had encountered a ghost hitting the wall or something, the darkness in front of them finally changed a little.

The light of the flashlight was finally reflected back, and it seemed to shine on a wall in front of it, and unlike the walls that would swallow the light around it, the reflected light was a little dazzling.

Without any pause, we walked forward for dozens of meters, a simple bronze giant gate appeared in front of us, the bronze ancient door left and right, see the situation can be directly pushed open from the middle, and in the middle of the two bronze ancient doors, have been carved up a dragon head, with the size of a bowl, in the dragon's mouth also inlaid with a bronze ring, just like the ancient gate of the big family with the ring for knocking.

However, underneath this bronze ring, there is a black iron chain that extends downwards and disappears into the ground, apparently connected to some mechanism.

Mao Gose took a few steps forward, tried to push it, but the gate did not move, and then pulled again, but the gate still did not respond.

This bronze ancient door, the dragon head on it and the ring in the dragon's mouth, can be used for decoration, and the ring can also be used to knock on the door or something, but what is the iron chain connected under this ring for?

Zhang Moxing looked at the two iron chains below, and after half-squatting down, he stretched out his right hand, and gently picked the iron chains up with his unusually long index finger and middle finger, while plucking the iron chains, while carefully listening to the strange sound coming back from the iron chains.

"Ding Ding ......"

The iron chain was moved by Zhang Moxing, and the two dragon heads on it seemed to come to life, and they each moved about ten centimeters to the left and right.

"This thing, it can't be some kind of cipher device, right?" I looked at the moving dragon head and couldn't help but say out loud.

It's no wonder that I said this, after the two dragon heads moved separately, there was an iron plate in the middle that looked like a gossip and nine palace diagrams, and there were rows and circles in the iron plate, and the scattered small iron bolts and the fine iron wires that linked these small iron bolts together seemed to have a strong visual impact and a full sense of science and technology.

And in order to open this bronze ancient door, it seems that those small iron bolts and wires must be returned to their original positions, and if they are forcibly destroyed, God knows what will happen.

I was dazzled by the dense small iron bolts and wires in the iron plate, and I couldn't hit this thing with eight poles, anyway, I didn't know anything.

"This ...... Could it be the Nine Palaces? No, this thing was invented in the Later Han Dynasty, how could it appear in that period? Huo Nan stared at the iron plate for a long time, and came up with this sentence, the good news is that this kid seems to know this.

"Do you care when it was invented, will you solve it?" I asked.

"It's okay, but I've only seen it in the ancient books treasured by Master and his old man, and this is the first time I've seen it with my own eyes, in this Nine Palace Plate, there are nine groups of iron bolts and nine sets of chains, each group has its own nine changes, and its evolution mode is very complicated." As he spoke, Honan took off his backpack and unzipped it to rummage through it.

Huo Nan rummaged in the backpack for a long time, and finally found a small bag in it, the color of the bag is very simple, gray and not slippery, it seems that the age is a long time ago, and I don't know what the material is, it is so strong, and it is still well preserved.

I opened the gray bag carefully, only to see that there were some small and delicate instruments inside.

Huo Cong took out a golden needle-like gold wire from it, about ten centimeters long, about twice as long as the acupuncture used by the old Chinese medicine acupuncture, what is surprising is that the front of the gold wire is not getting thinner and thinner, but every one centimeter of distance, there is a barb like a branch, starting from the front, there are a total of seven, seeing this thing, I faintly feel that if Huo Nan, this kid, goes to be a locksmith, it should be good.

After taking out this strange-looking thing, Huo Nan twisted the back of this thing, and the barbs that poked out were like tentacles, and they actually retracted, and then carefully inserted them into the Nine Palace Plate.

Immediately after, Huo Nan twisted the spiral rivet on the side, and went in and out, and there was a small and crisp collision sound from inside the Jiugong plate.

Seeing this, I raised the flashlight, adjusted the focus of the flashlight, and helped Huo Nan shine on the Jiugong disk after the brightness was not so strong.

Just as we watched Huo Nan tinkering with the Nine Palaces Plate, there was a sudden harsh friction sound in the passage behind him, not one or two, but hundreds of thousands of them, and the sound was getting louder and louder, and it made people's scalps tingle a little after a while.

"Speed up, Bloody Blade, you can take someone over to take a look." Mao Gose turned to look at the location of the passage and said with a frown.

Zhang Moxing nodded, waved his hand at the three soldiers beside him, and the four of them picked up their rifles and rushed towards them.

After only a minute, a rapid burst of gunfire rang out, and then, like firecrackers, could not be stopped.

"I don't know where a bunch of big guys came in, brothers, copy the guys, come over and top it!" One of the warriors rushed back and shouted.

"Chirp...... Chirp ......"

Almost at the same time as the gunshots rang out, there was a goosebump-inducing roar from inside the passageway, a small but piercing sound that made my heart pound a little as I listened.

Huo Nan's psychological quality is very good, he didn't pay attention to the dense gunfire behind him, and his hands still controlled the 'master key' steadily.

I looked at Huo Nan, who was busy unlocking with his head down, and then looked behind him, now the back road has been blocked, it seems that I can only say that hope is pinned on Huo Nan, only by opening this bronze ancient door can I continue to move forward, but what is behind this bronze ancient door, no one knows, this feeling of life and death is determined by heaven, I am very unaccustomed.

Perhaps only by experiencing the real moment of life and death can you know how beautiful it is to be able to live a dull life.

If the number of vampire bats in the secret room in front of you is amazing enough, then the number of black pressed guys who appear in the passage now will definitely only be more than less, and those vampire bats can still be killed with cold weapons, and if these guys don't have hot weapons to top, I'm afraid they will have to explain here.

Rushing up like a tide turned out to be a group of mutated rats, each of which was as big as an adult cat, amazingly big, although I had seen such a big mouse in the animal world, but all at once so many mice rushed wildly, the visual impact was too strong.

God knows what these guys grew up eating, but if you don't get rid of them now, the consequences will be dire.