I glanced at the jar and reached out and pulled the latch of the stone door. As soon as my hand touched the stone latch, I felt a strange thing in my heart: this latch had not been touched for a hundred and eighty years, but it had not grown a single moss in such a humid environment, and the stone door was the opposite, and it was already covered with dark green moss. So, someone must have touched this latch recently. Needless to say, it must be a colleague from the Optical Research Institute. In this way, the remaining four people must be on the side of the stone gate.

I pulled the latch open, and when I pulled the stone door open with the altar, a dark and tall corridor appeared in front of the four of us. This promenade is only slightly lower than the passage outside the door, but it is also six or seven meters high. If you look at it from the small door outside, you would never have imagined that the road behind the door would be so wide. Look at the stone door again, but it is only one foot thick, although it can block ordinary people, but if it is hit by mechanical force, I am afraid it will be difficult to withstand it. And the thickness of the stone wall where the stone gate is located is almost the same as that of the stone gate.

I looked down the dark corridor, which sloped downwards as if it were going deep into the ground, flanked by uneven and damp stone walls, covered with slippery moss.

After walking forward for about ten minutes, there was another cave hall. It's just that this cave hall was dug out by hand. As soon as I entered it, I saw two fire trays set up opposite each other on the left and right of the door.

The altar happily took out a lighter, directly lit a smile and said, "I didn't expect there to be its own lighting here!" "The fuel in the fire tray seems to be just a pile of ordinary charcoal, but it can still be used after thousands of years, I have to say that it is very strange.

The disc of fire "whirred" and then ignited along the entire wall of the chamber, continuing to the other disc and igniting it. It turned out that there was a groove on the wall of the cave hall that was the same height as the fire plate, and the groove was also filled with fuel. No matter where there is a fire in this circle, it will be ignited in its entirety.

At this moment, the appearance of the entire cave hall was completely displayed in front of the eyes of the five of us.

Judging from the curvature of the walls, this cave hall should be a circular stone chamber, but now we can see clearly under the light of the fire, the ground here is boxy, about 100 meters long and wide.

"Repair the house to the top and bottom, it seems that the owner of this stone room is still full of artistic sense!" Tanzi said casually.

"It's called a round place! It is a kind of cognition of the form of heaven and earth in ancient times. It has nothing to do with artistry," I said.

As we spoke, we looked inside, and there were four stone platforms two meters long and one meter wide fan-shaped, with the outer arc facing the entrance and the other end facing a pool inside. In the middle of the pool is a stone seat the height of a table, on which a bronze incense burner is placed. The stone seat is divided into two levels, and the lower level is constantly bubbling with water, like a fountain, and the water that flows out of it flows into the pool.

"Oops~" Tan Zi couldn't help but shout when he saw that there was a pool in the house, "I didn't expect there to be a pool in this house!" Now it can always be related to art, right? Who would make a sink in the house and put it in the middle for no reason? And the whole fountain decoration? ”

"Maybe they're used for swimming?" I said jokingly.

"It's just this pool, I haven't even splashed twice into the water before it comes to the end, and it's almost the same for bathing." Tan Zi also smiled and said, "Besides, there should be a fountain in the middle of this pool, and you have to walk around it for swimming." ”

In fact, the oval pool is not as small as the jar says, and I roughly estimated that its diameter must be more than ten meters long and wide.

As soon as Xu Yunshu saw the layout in this stone room, he immediately came to his senses and began to observe the surroundings. I saw that four aqueducts were connected to the pool at one end, like a simple drainage ditch, continuously draining the water in the pool; The other end is connected to the stone platform and flows into the stone platform. The bottom of the four stone platforms was all empty, and the water seemed to flow back into the underground river.

"The drainage skills of the ancients are still very good!" The jar exclaimed.

"Of course!" Xu Yunshu looked at the stone platform and said to the altar, "The earliest drainage system appeared about 9,000 years ago, but it was relatively simple. Chang'an City in the Western Han Dynasty was a drainage network composed of three sets of drainage systems: moats, open channels and culverts. In the Sui and Tang dynasties, the drainage system of Chang'an City was even more advanced, and even filtration and dredging were taken into account. As for the pinnacle of the drainage system in ancient China, it is the Forbidden City in Beijing, in which there are countless drainage "organs", no matter how heavy the rainstorm can not help it, it can be said that it is the master of ancient building drainage...... Compared to what I've mentioned, the way it drains here can be said to be nothing in between. ”

"What the hell is this place?" Xiao Ai looked around for a long time and asked Xu Yunshu, because she was probably the only one here who could answer this question.

Xu Yunshu stood up from the stone platform and said, "If I'm not mistaken, this should be a place of sacrifice - the sacrificial hall!" ”

"The sacrificial hall?" The altar cried out, "There is a fountain and an incense burner here, where is it like a place of sacrifice?" ”

"You see that on the ground next to these four stone platforms, there are iron chains fixed on them, and there are shackles on them...... We looked towards the place Xu Yunshu pointed to, and sure enough, we saw several iron chains with shackles and rust.

“...... These chains were supposed to be used to bind the sacrifices. Xu Yunshu said.

"A living sacrifice?" Hua Tianyu asked.

"Living sacrifice! Otherwise, you won't need shackles. ”

"What sacrifice? Pig or sheep? Jarzi asked.

"Look at the size of these handcuffs and shackles, and the size of this stone platform, how can it be a pig or a sheep? People, of course! Xu Yunshu said.

"It's very similar!" I said, "But that alone doesn't tell you exactly what it was like to sacrifice a living person, does it?" If it was really a human animal, how many human bones would be left here? ”

"But there are no pork bones or sheep bones left here!" Xu Yunshu said, "Actually, the use of people as sacrifices here is not my own speculation, the sides of these stone platforms are engraved with pictures. ”

I said that Xu Yunshu had just squatted there and been taking pictures of the stone platform with his mobile phone, and it turned out that he was taking pictures of the pattern of the stone platform as a record.