The hall was empty, Yun Hongyue screamed tentatively, and only her aftermath fell in the silence.

After looking inside and out of the entire hall, there was indeed no sign of anyone's existence.

No, the only place that can be reached behind the stone arch is here, how can there be no one?

Yun Hongyue didn't believe in evil, and stood alone in the center of the empty hall, pinching her fingers and counting in the increasingly dim environment.

This calculation really made her make a new discovery.

"Down there?" Yun Hongyue stomped on the stone bricks under her feet, making a very dull sound, which didn't sound like hollow below.

Walking to the front of the hall, there is a huge wooden screen behind the long desk, which is carved with the pattern of auspicious clouds and cranes.

The crane carving is lifelike, and the eyeball is even more vivid, as if it is inlaid with something like obsidian.

Yun Hongyue did not hesitate to press the obsidian down, and sure enough, there was a "click" sound, and the wooden screen slowly opened to the side, revealing a dark downward stone staircase.

Yun Hongyue thought that there would be a hidden secret room under the stone steps, but when she walked down, she found that this was not a secret room, but a huge dungeon hidden underground.

Walking down the stone steps, there is a long passage, and there are oil lamps on the walls of the passage every few meters, all of which are faintly lit at the moment.

It was the lighting of these oil lamps that made Yun Hongyue dare not move forward rashly.

This place looks secretive, and according to common sense, there should be people guarding the inside and outside, and it is impossible for a single person to disappear.

After hesitating for a long time, Yun Hongyue finally walked out of the winding passage, and appeared in front of him a row of cells used by detainees.

The moment she saw these cells, the hairs on Yun Hongyue's body suddenly stood up, and she didn't know if it was an illusion, she felt that there was an uncomfortable smell of blood in the slightly humid air.

Thankfully, walking through the cells found that they were all empty, and not only that, but they all looked clean, with no torture instruments or dried blood or anything like that.

Further on, the cells were gone, leaving only a corridor paved with black stone.

Along the road, the road was blocked by a stone gate.

A closer look at the stone door reveals that there are many grooves in the stone door, and countless brass beads are embedded in it.

Yun Hongyue counted, and there were twenty-eight brass beads in total, which made her easily think of the twenty-eight constellations.

Sure enough, if you look closely, these brass beads are engraved with a tiny handwriting, representing the name of each star.

It seems that the way to open this stone door is on these beads that represent the stars.

At this moment, Yun Hongyue discovered that these beads on the stone door that were embedded in the stone door could move slowly in the grooves.

After studying the trajectory of the beads for a while, Yun Hongyue suddenly realized that the password of this stone door should be different every time it was opened, which explained why there were smooth friction marks on each bead.

The 28 nakshatras are divided into four signs, representing the four directions of south, east, west, and northwest, with seven nakshatras in each direction.

So, which direction and which seven stars should be the password to open the stone gate this time?

Yun Hongyue was a little distressed, it was not completely dark when she entered the main hall, and it was impossible to know what the starry sky would be like tonight.

Could it be that now we go back and take a look?

After thinking about it, Yun Hongyue shook her head decisively, but closed her eyes and stretched out her hand to calculate.

After a while, Yun Hongyue opened her eyes, studied the beads representing the stars on the stone door, and began to move carefully.

"Tonight the stars are in the east, and the seven stars in the east are the horn, the horn, the horn, the heart, the tail, and the kei."

Whispering, Yun Hongyue also moved the beads representing the seven stars one after another, and finally connected them into a line on the stone gate, and the stone gate opened with a "boom" in an instant.