Leng Yun came to the bookshelf and took down the two encyclopedias on the shelf. He said to Leng Qianqian: "These two books should be codebooks. ”

Leng Qianqian said: "In other words, the wavelength of yellow light is 570-585 nanometers, which is the 585th word on page 570 of the English Encyclopædia Britannica under the yellow porcelain vase, right?" ”

Leng Yun said: "That's it, the same way, the French encyclopedia under the green porcelain vase should be the 577th word on page 492. ”

So, Leng Yun opened two books and found these two words, one was a candlestick and the other was a pendulum.

Leng Yun hurriedly looked for these two things in this study, and there was indeed only one candlestick in the study, and although there were two clocks, there was only one clock with a pendulum.

Cold Cloud tried to move the candlestick and the pendulum, both of which seemed to be able to rotate, but how exactly should they rotate? Leng Yun didn't dare to move rashly, for fear of triggering the alarm.

So, Leng Yun returned to the encyclopedia and looked at those two words. This time, Leng Yun discovered that there was a small dot under these two words, and if you didn't look carefully, you couldn't see it at all.

Leng Yun saw that the dot under the word candlestick was on the left, and the dot under the word pendulum was on the right, Leng Yun suddenly realized, walked quickly to the candlestick, turned to the left, and then turned the pendulum to the right.

"Click, lala......" There was a slight sound, and Leng Yun saw that an opening popped open at a seam on the bookshelf, and a number dial appeared inside, which could toggle the numbers, with a total of 4 digits.

This is a mechanical password disk, which cannot be cracked electronically, Leng Yun asked Leng Qianqian, what should this password be?

Leng Qianqian said: "If it's a number, there are only four numbers: 570, 585, 492, and 577, so let's find the pattern in a few numbers." ”

After looking for a long time, she didn't find a regular number, and Leng Qianqian also felt at a loss. Leng Yun began to review all the events of the night.

The two vases correspond to two books, which in turn correspond to two objects, which in turn rotate in two directions, and finally a four-digit password appears.

Leng Yun asked: "Qianqian, you try to perform an operation, can you make these four numbers, and finally get two pairs of numbers." ”

Only 20 seconds later, Leng Qianqian said: "There is really a pattern as you said, the number is 7878." ”

Leng Yun asked, "How did you come up with this answer?" ”

Leng Qianqian said: "First of all, the four numbers 570, 585, 492, and 577 are arranged according to their size to become 492, 570, 577, and 585, and then subtract the previous number from the latter number. ”

Leng Yun said with a smile, "So that's the case, 570 minus 492 equals 78, 577 minus 570 equals 7, and 585 minus 577 equals 8. ”

Leng Qianqian said: "That's it, but will the password be like this?" ”

Leng Yun said: "Judging from all the clues just now, this possibility is the greatest. ”

So, Leng Yun walked to the side of the cipher disk and dialed the 4 numbers 7878. And at this time, the bookshelf made a "clang" sound, and slowly opened, and it turned out that there was a space behind the bookshelf.

Leng Yun walked towards this space, and as soon as he entered the space, he smelled a foul odor that made Leng Yun almost vomit.

Leng Yun endured the stench and used the flashlight on his phone to illuminate the space, which was not large, with only a desk and chair in it.

And on this desk and chair, what Leng Yun saw turned out to be a skeleton!!

The sudden scene startled Leng Yun, but then he calmed down and walked to the desk, Leng Yun saw a notepad on the desk, and there was a pen next to the notepad, obviously this skeleton wrote some things in the notebook when he was alive.

Leng Yun picked up the notebook, on which there were many words written in Russian. And the first sentence surprised Leng Yun, only to see that it was written: "I am Moskov, someone wants to kill me, and the person who wants to kill me is myself!! ”

Leng Yun couldn't understand what this sentence meant, he continued to read, only to see that the notepad read: "I'm dying, when I was checking the collection in the museum, suddenly a person appeared, this person looked exactly like me, he stabbed me in the chest, and my most loyal butler Nilsky was killed on the spot by another person, that person turned out to be the same as Nilsky." ”

Leng Yun was very surprised, if what was said in the notebook was true, it meant that Moscov and his butler had been assassinated, and their assassin looked exactly like Moskov and his butler Nilsky.

The notebook continued: "I tried my best to escape, and finally hid in this secret room, where the fake Moskov and Nirsky kept looking for me, but they couldn't find me." Later, I heard that the killer who looked like me had reported to a man called 'Lord Seven' that he had killed me, and I guess he didn't dare to report that I had escaped. But that's pretty much it, because my wounds are inflamed, and I have no water or food, and I'm going to die soon. ”

Leng Yun was taken aback, of course he knew that the "Lord Seven" in the killer's mouth must be the Grim Reaper Seven. That is, now Moskov and Nilsky are not themselves, but stand-ins sent by Death Seven.

Leng Yun asked Leng Qianqian to scan the skeleton, and Leng Qianqian told Leng Yun that according to the ray analysis, this person should have been dead for about half a year.

"About half a year?" Leng Yun muttered, "Didn't Romanova say that Moskov seems to have changed as a different person since half a year ago, that is to say, what this notebook said should be true." ”

Leng Qianqian said: "In other words, now Moskov is the person of Death 7, if this is the case, then it proves that the disappearance of the Tianzhou 13 spacecraft is the ghost of Death 7!" ”

Leng Yun nodded, then looked at the notebook, only to see that it was written at the end: "I'm about to die, today I heard a report from the person who killed me, saying that the production problem of glass parts has been solved." Whoever finds my bones, hopefully he can find out the truth! ”

Later in the notebook are some of the locations used to store top-secret materials in private museums, apparently in the hope that those who discovered the truth could find some clues.

Leng Yun looked at the notepad again and thought that the content in it should be true.

Leng Yun said to Leng Qianqian: "Speaking of glass parts, I remember hearing that Moskov bought a thousand-year-old glass factory in Venice, and at first I thought that his personality had changed drastically, and he liked antiques and handicrafts, but it seems that he is not, he is going to make some kind of spaceship parts." ”

At this moment, Leng Yun's mobile phone rang, Leng Yun picked up the phone, only to hear Romanova say: "Leng Yun, hurry up, Mr. Moskov is looking for you everywhere!" ”