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The door of the dark castle is tightly closed, so only a section of the upper steps is piled up with yellow sand that has seeped into it over the years, and the further down it goes, the cleaner it becomes, and after going down more than ten meters, there is basically no sand covering the ground again.

Sanjiuyi was paying attention to the marks on the wall, and he said that judging from the newness of the marks, they should have been left recently.

When I heard the news, I was excited, and I have been active in the vicinity recently, and it has descended to a depth of nearly twenty meters, and it is very likely that it is Jiaohe.

We accelerated the speed of downward progress, and when we walked to more than 30 meters underground, I couldn't help but doubt this tower-shaped building, which was not without tall buildings in ancient times, such as the Golden Pagoda in Egypt was more than 140 meters, but it was a 'platform' type of building.

As far as I know, the tallest tower in ancient China was more than 80 meters.

When we finally stepped down the last step, Sanjiu reported a depth of 150 meters, and even he thought it was incredible.

At 150 meters, it's no wonder that Asim won't come down with us, this depth can be called a 'bottomless pit' for him.

"Strange, why is there no door here?" I used my flashlight to shine on the bare wall and muttered to myself, although there was no door on the wall, there were many small holes, and there was air flow through the small holes, but unfortunately the small holes were the size of soybeans, and it was a dream to see the outside through it.

"The mark is broken here." Sanjiu couldn't find the mark of the shape on the wall, he stood by the wall and stretched out his hand to touch the wall, probably looking for a mechanism.

"Maybe the people who came down found that there was no exit and returned the way they came." I analyzed.

"There were footprints on the steps when I came in, and from the direction, there was no return." Sanjiu affirmed.

"That's why you think there's another exit down there?" I asked.

"It's just a possibility, it's also possible that they're all dead." Sanjiu Shen Dao.

I suppressed my unsettling suspicions, pondering the ground beneath my feet as he searched for a secret door on the wall. The 150-year-high tower must have a sturdy pedestal, and I was puzzled by the fact that such a tall building. Why is it never recorded or mentioned?

It will definitely leave a strong mark on the history of world architecture, especially the explorers who visited the empty desert and did not let go of this amazing discovery!

Unless...... As Sanjiu said, all the people who came in were dead!

I didn't have a thought in my mind, but I felt empty under my feet. I hurriedly tried to grab something that could stabilize my body, but the whole ground was split into two halves and retreated to the left and right, and then quickly closed, not giving us time to react at all.

Fortunately, based on previous experience, I put the flashlight on my wrist in advance, so that I could see Sanjiu's position, and he stabbed the rock wall with a short sword after falling, and I ordered the corpse puppet to catch him, and I grabbed the corpse puppet again, imitating the shape of a monkey fishing for the moon. One grabbed the other and hung on the rock wall.

The situation below was similar to what I expected, a large square pedestal, but hollow inside, and the walls were polished and smoothed.

I thought that this round tower was an ancient arrow tower or watchtower, but now it seems that its purpose is far from what I thought.

The foundation alone was twenty meters deep, and we carefully slid to the bottom, and sure enough. The ground was littered with bones, the result of a fall from a height of twenty meters.

The skeletons wore all kinds of clothes, robes, old military uniforms, leather boots and breeches, etc., etc., but there were no fresh corpses. I secretly breathed a sigh of relief, but fortunately Jiaohe was not here.

Sanjiu touched my arm at this time, pointing in the dark, and my flashlight shone at the place he pointed, the tower above was cylindrical, and the base below was square. The position of the three nine fingers is the corner of the square base.

"Biscuit bags!" I felt a little silly and screamed in surprise at the sight of the empty biscuit bag on the floor.

But this also indicates that someone really came in recently and ate a pack of cream cookies! That can only be a modern person, because the brand of biscuits is very modern!

"Being able to eat means that someone is out alive." Sanjiu thought more fully than I did, and he picked up the empty biscuit bag, put it under the sign and sniffed it.

Then he continued to look for an exit on the four walls, for the corpses on the ground were all old corpses, and the people who ate the biscuits alive were not here, so he must have found the right exit and left.

Sanjiu touched all four walls and said to me, "You stand in the middle of that wall, and there is a slightly darker rock, let's push it into it together." ”

I did as I was told, always feeling a little familiar with the scene before me, and when we pushed the rocks at the same time, the two rocks retracted into the wall, and in the middle of the ground, a downward staircase entrance appeared.

"Let's go." Sanjiu didn't say much, and jumped directly off the entrance.

"I remember!" I walked behind Sanjiu, grabbed his clothes, and said, "This mechanism is the same as that of Sanzhang Tongjing." ”

"You didn't make that well?" Sanjiu asked. His expression seemed to say, "You're so surprised at what your own people have made, it's an exaggeration!"

"Of course, no! The well was the 'cell' they had found for me, but they had not made it. I said it very seriously.

"Maybe it's just a coincidence, there's no need to be so excited." Sanjiu slowed down his tone, as if he was coaxing a child who was drilling the horns of a cow.

But soon, the emotions he soothed made waves again, and at the end of the stairs was a small room with a well in the middle of it!

The mouth of the well is made of pure bronze, and I guess the body of the well is too, with runes and patterns cast on it, and it is a rare equilateral triangular well.

"It's the same even this, it's really ......" I'm a little short of words, if the mechanism above is a coincidence, how to explain the Mitsui Copper Well that is exactly the same as in my memory, and even the symbols and patterns on it are exactly the same.

"You've seen it?" Sanjiu asked.

"After the mechanism under the three-zhang copper well is activated, a downward ladder is exposed at the bottom of the well, and at the end of the ladder, there is such a well, the underground well, the upper circle and the lower triangle, which is very unique." After my memory was restored, Li Miaoxue's experience in the underground was also recalled, and the doubts I encountered when I went to Tongjing with Sanjiu last time were naturally solved.

"What's down there?" Sanjiu stood by the well, observing the symbols on the well.

"In the triangular well under the Sanzhang copper well, is my sister's body, Zixiu, this well is used to lock things." I said in an accentuated tone.

No matter who used cement to fill the Sanzhang copper well, he must know the secret of the well, as I guessed with Sanjiu at the time, the choice to seal the well with cement is because the things under the well cannot be taken away, so it can only be sealed, this triangular copper well itself is a big secret!

[Thank you for your continued support, this time from the 515 Fan Festival of the Writer's Hall of Glory and the General Election of Works, I hope you can support it.] In addition, there are some red envelopes on the fan festival, get one and continue the subscription! (To be continued.) )