(Foreword)

What you see is not what you know, and what you know is not what you see.

(Text)

September 22, 2021 at 9:32 a.m.

Cui Li and I returned to the controller in the center of the hall. There are a total of five buttons on the control panel, corresponding to the five English letters------- 'A', 'F', 'O', 'Q', 'W'.

What does the letter mean? Is it to combine them into some special letters? Cui Li dragged his chin and looked thoughtful.

"Probably not, no matter how you put it together, it doesn't seem to be anything special." I kept spelling words in my head that could be combined, but I still didn't find anything.

There are a dozen rooms around the hall, can it be opened with just these letters? My thinking hit a plateau for a while.

I pressed a few more buttons at random. Suddenly, the door in front of my right opened.

It seems that there must be some special relationship between these letters.

"Come and see!" Cui Li shouted as he stood in front of the door that had just been opened.

"What's wrong, did you find anything?" I walked over.

"Look, there seem to be some numbers on the door." Cui Li pointed to the gate.

I looked in the direction he was pointing, and there were numbers carved into the door.

I took a closer look at 1-1-6-1-5.

I walked to the side gate again, and it was engraved with 1-5-2-3-6.

Strangely, this should not be the house number, and the order of the numbers is not connected...... But what does this have to do with the buttons on the control panel?

I didn't speak, and I went into the abyss of contemplation alone.

Whenever I think about something, I can always hear the sound of chess pieces and chessboards, and it seems to be trying to tell me something.

I walked up to the controller again and tried to press two buttons in a row, but nothing happened, I pressed one button again, and the door closed just now, and the door behind me opened again. It seems that I can open a door with the press of three buttons, and I press the other three buttons at random, but strangely, no new doors open. Am I wrong in my speculation? I pressed the letter 'A' button again. Suddenly, the door next to Cui Li slowly opened. There's no logic at all, and it seems like three buttons or four buttons can open a door.

It seems that only by finding the connection can the designated door be opened, "Cui Li, give me paper and pen!" Fast! "I wrote down the order of the buttons I pressed on a piece of paper. At the same time, let Cui Lili open the door a few times.

September 22, 2021 at 9:56 a.m.

I put the two pieces of paper together and wrote down the order of the buttons and the gate number we had written down earlier.

'A', 'O', 'F', 'Q'------ no door opens.

'F', 'W', 'Q'-------- the number that opens the gate is 6-2-3-1-7.

'O', 'Q', 'W'------ no door opens.

'A', 'O', 'Q'------ the number that opens the gate is 1-1-5-1-7.

'Q', 'A', 'F', 'A'------ the number of the open gate is 1-7-1-6-1.

I looked at the permutations of the two sheets. "I see! I know the pattern! I quickly pressed a few more buttons. A door slowly opens to us. "Cui Li, do you see if the number of this gate is 2-3-6-1-6?"

"yes, it's really 2-3-6-1-6." Cui Li shouted at me.

It seems that my speculation is correct, and then the door will finally be opened to Li Ruina.

I walked up to the gate and looked at the number ---- 1-5-6-2-3.

"You haven't told me what this pattern is, have you?" Cui Li looked at me curiously, remembering the number at the door.

"It's actually quite simple, as you say it's not a combination of words. It's just a sequential arrangement. I took the paper in my hand and shook it in front of him.

"What do you mean, you should be clearer, what arrangement? I don't understand it at all. Cui Li pushed away the paper in front of him and said.

"Of course, it's the arrangement of the letters. Look..."I wrote on the paper.

The order in which the 'A' is listed in the English alphabet is '1'. Again, 'F' is '6'. The 'O' is the '15'. 'Q' is '17'. The 'W' is the '23'.

"Oh, that's what happened, the number 1-5-6-2-3 on the door of the room where Li Ruina was, which is the 'O', 'F', 'W' of the buttons. Is it? Cui Li gently patted his forehead with his hand.

"That's right, we're about to open the door to Li Ruina." I quickly pressed 'O', 'F', 'W' on the control panel. Three letters.

Suddenly, Li Ruina's door slowly opened, and a familiar figure slowly walked out from inside. This person is none other than Li Ruina.

September 22, 2021 at 10:09 a.m.

"Great, I'm so happy to see you." Li Ruina walked towards the controller.

"Why are you inside, where did Lin Yun go?" Cui Li was anxious to know the answer immediately.

"I don't know, after Lin Yun and I came to the second floor together, I saw this controller in front of you, we pressed a few buttons at random, and the door opened, and I entered the room alone and began to check, but just when I entered, the door suddenly closed, and then I kept using the walkie-talkie to call, but it was unsuccessful, until your voice appeared.

"What about Lin Yun, she didn't save you?" I looked at the hall and there was no one else but us.

"I don't know, as soon as I entered this room, there was no news of her." Li Ruina looked at the look on our faces. "What's wrong with her, is something happening? Tell me! ”

"Don't get excited, Lin Yun should be fine now, Cui Li and I saw her in the room on the first floor, and she was talking to Zhang Hairui about something." I told Li Rena everything I heard in the room.

You can see how shocked she was when she heard it. "You say Lin Yun! This can't be, this can't be, you're not mistaken. ”

"I can't be mistaken, I'm sure that person is Lin Yun, and everything should be planned by her." Cui Li's voice was full of anger.

Just when we put all our doubts on Lin Yun, my walkie-talkie suddenly rang, "Is there anyone?" Can you hear me? I couldn't believe the voice. I slowly picked up the walkie-talkie, paused, calmed down and asked calmly, "Lin Yun!" Is that you? ”

The answer on the other side of the walkie-talkie made us confused again: "It's me, by the way, Li Rena is trapped, I'm looking for you on the first floor for help, where are you."

For a while, I didn't know how to answer...