This passage was surrounded by concrete walls on all sides, like the corridor of an unfinished house, and it seemed to be quite long. Although they had flashlights, they could not see the end of it for a while.

Ling An and Tang Yao followed closely behind Song Yecheng. Because the passage was narrow and Song Yecheng's body was blocking the way, the two of them could basically not see the road ahead. They could only keep an arm's length away from each other and follow forward step by step.

After walking about a few dozen steps, Tang Yao was about to ask why the passage was so long when she heard Song Yecheng in front of her remind her, "Be careful, there are stairs."

It was a downward staircase, and judging by its length it clearly led to the second floor, which matched the direction indicated by the dotted line on the floor plan.

The angle of the stairs was quite steep, so the three of them couldn't help but slow down their pace. When they finally reached the bottom and stepped onto the flat ground, before they took two steps forward, Song Yecheng suddenly stopped.

Ling An was startled by his sudden braking and almost bit his neck in surprise: "What's wrong?"

"There's no way out." Song Yecheng said.

"ah?"

Tang Yao, walking last, stood on tiptoe and peered over the two men's shoulders. Only then did she see in the flashlight beam that there was a wall not far ahead. "How could this happen?"

Song Yecheng's first reaction was also bewilderment, but he quickly remembered the vent he had come in from before, and immediately turned his wrist to the side, shining the light towards the side of the wall.

"Oh, here it is."

There was indeed a square board on the wall that looked like a low door.

Song Yecheng walked over, and Ling An and Tang Yao immediately followed.

Like the vent upstairs, this square plate is also a metal plate fixed to the wall, but the difference is that this plate is completely sealed, without any ventilation bars, and there is even a keyhole on it.

"Why does this look like a distribution box?" Ling An said casually, but suddenly became serious. "Could there really be a circuit breaker inside?"

Looking at the small keyhole, Song Yecheng suddenly had an idea. He quickly took out the extra key from his pocket when he opened the cabinet door earlier, inserted it into the keyhole and turned it. With a "click", the metal door opened.

"Ah—" Tang Yao and Ling An suddenly realized, "No wonder there are so many keys!"

Song Yecheng nodded and pulled the metal door open. As soon as he shone the flashlight inside—

"Oh my god!" Tang Yao took a step back reflexively.

"Fuck!" Ling An couldn't help but swear.

Song Yecheng was fine at first, but he was frightened by the two of them and his heart sank.

——In front of me was a white shadow floating in the air. At first glance, it looked like a female ghost. But when I looked closely, I found that it was just a hanging white coat.

Tang Yao patted her chest, her nerves having just calmed down. Ling An looked up along the clothes, and after seeing the clothes drying rack and horizontal bar above, he immediately realized: "Wardrobe?"

Song Yecheng reached out and pulled the white coat aside, immediately revealing two wooden boards with a gap between them. He leaned forward and pushed, and as one of the boards opened outwards, natural light finally came in.

This is indeed a wardrobe.

"Walk."

Song Yecheng bent down and took a step forward, leading the two of them out of the closet. After jumping onto the ground, they saw that in front of them was a dormitory, just as shown in the floor plan.

"Whose room is this?" Ling An asked.

"It should be Duan Jingming's." Song Yecheng replied.

According to the floor plan upstairs, this room is located near the end of the dormitory corridor. In his impression, it should be the room where Duan Jingming lives. In addition, Ling An's reaction at this time clearly showed that he did not recognize this room, and he had been to Tang Yao's dormitory, so this exclusion made it even more certain.

"Why is there a secret passage in his room?" Tang Yao asked puzzledly.

Song Yecheng listened to her question, but his focus was not on this. He turned around and looked at the secret door in the closet, feeling inexplicably strange.

He originally thought that this exit would be the same as the one upstairs, a secret door hidden behind the furniture that was difficult to find. He didn't expect it to be set so casually in the closet. As long as Duan Jingming opened the closet, wouldn't he be able to find it?

However, although it was strange, he couldn't figure it out for a while. So he decided not to dwell on it and suggested, "Let's look around first. Didn't he find any clues last night? Then the flashlight and pass in his room should still be there. We can take them as a backup."

Ling An and Tang Yao thought it made sense and immediately started searching around with him.

The decoration style of Duan Jingming's dormitory is very simple, similar to the business rooms in ordinary hotels. In addition to the bed and wardrobe, there is also a set of business desks and chairs, a leather single sofa and a dressing mirror mounted on the wall.

The three of them searched every corner carefully, turning the bed, wardrobe and desk upside down.

However, after a few minutes, they found nothing.

Not to mention flashlights and pass cards, there wasn't even a communicator manual or base map in the room. All the drawers and cabinets were spotlessly clean. If it weren't for a white coat hanging in the closet, the whole room would have looked as if it were brand new and had never been used.

"What's going on?" Tang Yao asked in confusion, "Has it been taken away?"

Ling An was equally confused and speculated, "Could it be that the dormitory was cleared out because he...died? But that's too fast, isn't it?"

Song Yecheng didn't say anything. This discovery made the strange feeling he had just felt even stronger.

It would be fine if the props had really been taken away, but if not, does it mean that they might not have existed in the first place?

If the base deliberately didn't place props in his room, what does this differential treatment mean?

Song Yecheng frowned slightly and pondered silently for a moment. Some guesses emerged in his mind, but the basis for those guesses was still weak, so he did not rush to mention them. After a while, he just said: "Let's find another exit first."

There are two dotted lines in the floor plan upstairs. One is connected from the experimental area on the third floor to here, and the other is connected from here to the instructor's dormitory area at the other end of the corridor. This means that they have only walked halfway, and there must be another exit in this room.

"Exit..." Ling An and Tang Yao muttered, turning their heads to look in different directions.

Since it is an exit, it must be opened on a flat surface, but it does not necessarily have to be on the surrounding walls. The ceiling above and the floor under the feet are both possible.

The only piece of furniture against the wall in this room was the wardrobe, which was where they had just entered. The three of them were very sure that there was no other entrance or exit behind it.

As for the floor, when they were rummaging through things just now, they had already checked places like under the bed and under the table, and did not find any secret doors that could be opened. Now looking at the ceiling, they did not see any vents or other things that could be opened. So after a moment, the three of them looked at the leather single sofa at the same time.

The single sofa is not large, but it occupies an area of ​​one or two square meters, enough to cover the entrance of a tunnel.

"Could it be down here?"

As Ling An spoke, he quickly walked to the back of the sofa, grabbed the backrest and dragged it back a few steps. Soon he dragged it away from its original position, revealing the open space underneath.

Song Yecheng and Tang Yao went over and squatted down, carefully examining the ground, but did not find any cracks. They bent their knuckles and knocked on it, but the sound they heard was also extremely dull.

"Solid." Song Yecheng judged.

Ling An and Tang Yao were both puzzled, because this was the only place in the room they had not checked. Now that they saw that even it was ruled out, they couldn't help but turn their heads and look around again. They even began to doubt whether there was another exit in this room.

At the same time, Song Yecheng's gaze was cast in the opposite direction of the two people's sight, sweeping across every inch of the surrounding wall bit by bit. After a moment, he suddenly stopped and fixed on the dressing mirror embedded in the wall.

The next second, he stood up on his knees and walked straight to the wall.

When he got to the mirror, he raised his hand and fumbled around the edge of the frame. Then he grabbed one side and pulled it outwards with force. With a "click", the mirror was opened by him.

It turned out to be a single door.

Behind the door was a dark entrance.

“I’ll go!”

Ling An was surprised and suddenly realized: "It's here?"

Tang Yao quickly stood up and stepped forward, Ling An also immediately moved over. Song Yecheng turned on the flashlight and shone it inside, only to see that the entrance of the cave was indeed a secret passage that was almost the same as the previous one.

"Let's go." He turned around and called.

Ling An and Tang Yao walked in, and Song Yecheng followed closely behind them. Just as he was about to close the door, he suddenly said "Huh?" in surprise.

"What's wrong?" The two turned around immediately.

Song Yecheng raised his chin towards the mirror door in his hand, and the two of them discovered that the mirror door was actually one-sided - from the inside of the room it was just a mirror, but from the secret passage looking out, one could see the entire scene in the room at a glance.

"Hiss..." Tang Yao couldn't help but take a breath, "Is this used for surveillance?"

Just imagine that when Duan Jingming was in the room, someone was standing in this secret passage watching him and he didn't even know it. It's really terrifying to think about it.

Song Yecheng also felt that this design must be strange, but he couldn't guess the specific intention for a while, so he simply didn't think about it for the time being: "Forget it, let's go first, and talk about it outside."

He closed the mirror door casually, walked around to the front of the two of them, and led the way for them with a flashlight.

This secret passage is indeed almost identical to the previous one, but because it leads to the same floor, there are no stairs. Instead, it extends straight to the other end of the corridor.

After walking a few dozen meters, when they were blocked by a wall again, Song Yecheng very experiencedly turned the flashlight to the wall next to him and immediately found a door-shaped depression in the wall. Deep in the depression was a wooden board that looked very thick and had a bow-shaped handle on it.

Ling An stepped forward, grasped the handle and pushed it inward, but the wooden board only shook slightly and did not move open.

"Um?"

He wanted to try with a little more strength, but Song Yecheng seemed to have thought of something. He grabbed the handle and pulled it to the side. There was a series of dull sliding sounds, and the wooden board immediately moved to the left.

"Oh, it's a sliding door?" Ling An asked curiously.

As soon as the wooden board was opened, light came in immediately, and about one meter away there was another wall, as if entering another corridor.

The three of them were a little surprised, but when they stepped in, they found that what they opened was not a door panel, but a closet against the wall. What was in front of them was not a corridor, but a hallway at the entrance of a room.

"Whose room is this?" After passing the entrance, Tang Yao looked around curiously.

"Teacher Bai's." Song Yecheng said.

Although he already knew the answer when he looked at the floor plan, the layout of the room was somewhat beyond his expectations.

This place is obviously different from the volunteer dormitory. It doesn't look like a single room in a hotel, but more like a two-bedroom, one-living room apartment in an ordinary house. In addition to the bedroom, there is also a small study and a living room with a sofa and a TV.

"The instructor's dormitory is so big?" Tang Yao asked curiously, "It even has a TV?"

Song Yecheng guessed: "Maybe it's because they are permanent residents, and the volunteers are just staying for a few days and then leaving."

Tang Yao nodded in agreement, and Ling An walked around the living room and turned back to ask, "What should we do now?"

Song Yecheng looked around the room and pondered, "He took us to that office and left us the key to the secret passage. He must have hoped that we would find it here, so there should be clues here. It happens to be two bedrooms and a living room. Let's each be responsible for looking together."

Both of them agreed. Ling An raised his hand and pointed around: "Then I'll be in charge of the living room?"

"Then should I go to the bedroom?" Tang Yao said.

Song Yecheng nodded, said nothing more, and walked straight to the small study room that the two of them had chosen.

There are not many furnishings in the study. There are two doorless bookshelves against the wall, a simple desk in the middle, and a magazine rack and two pots of green plants by the windowsill.

Song Yecheng walked to the bookshelf and glanced at it from top to bottom. He found that most of the book titles were related to "memory research" or "psychological suggestion", but he could not see any book that was obviously special.

Considering that this was a show after all, no matter how obscure the clues were, it shouldn't be necessary to read all the books from beginning to end. Song Yecheng simply focused on finding out if there were any suggestive items, folds, or notes hidden in the books, and just stood in front of the bookshelf and started searching quickly.

About ten minutes later, he put the last book in his hand back to the bookshelf, but found that he had found nothing - all the books here looked like brand new and no one had touched them. Not to mention any hidden objects, there were not even any creases.

Do I really need to read the content carefully?

Song Yecheng couldn't help but murmur, but quickly rejected this unrealistic idea. He turned around and walked to the desk.

There were a lot of paper materials scattered on the desk, most of which were documents related to experiments within the base. Song Yecheng flipped through them roughly and didn't see any useful information, so he walked around to the desk and sat down, opening the only drawer.

The things in the drawer were neatly arranged. In the front left were several stacks of brand new lined letter paper, in the front right was a box of pens and spare refills, and nearby was an unopened pack of tissue paper and a leather notebook.

notebook.

Song Yecheng's heart moved, and he immediately took it to the table and opened it. Inside the leather cover, there was a blank title page with a date and a signature written in the lower right corner:

[Opened in March 2020, Jiangque]

Jiangque?

Song Yecheng was stunned.

Why "Jiang Que"? Didn't he use the name "Bai Ye Ling" on the show? Was it a typo?

Confused, he turned to the next page and saw a passage with a date on it. It looked like a diary or something.

Song Yecheng immediately started reading from the beginning, but he never expected that he couldn't understand the first sentence:

[March 22, 2020.

Today, we received another surrender...】

Received a surrender?

Song Yecheng frowned in confusion and was about to continue reading when he heard Tang Yao's excited shout from the bedroom: "Hey! Come and see!"

Song Yecheng immediately stood up, took his notebook, walked out of the study, and went into the bedroom with Ling An: "What's wrong?"

At this moment, Tang Yao was standing in front of the open wardrobe, holding a pair of suit trousers in her left hand and a black wallet-like object she had just pulled out of her trouser pocket in her right hand. She waved it at them with an incredulous look on her face, "Guess what this is?"

Song Yecheng and Ling An walked closer quickly and took a closer look. They found that it was not a wallet, but a cover with a clear steel stamp on it.

"Police ID?!"