Professor Chen walked slowly to the stone gate and carefully inspected the stone gate.

This stone door has the front eaves purlin that is excavated from the mountain, there are some vague colored paintings on it, down is the middle sill, some flying beasts are carved in the fight, above the door, the four door hairpins are carved with the four words "sun, moon and starlight" respectively with the official book, and the lower sill of the door is two drum stones on both sides.

Professor Chen squatted down on the drum stones on both sides and looked at it for a while, and then said to Zhang Gong: "Lao Zhang, this is a bit interesting, it is obviously a single-leaf stone door, if you have to make the design of the door, what do you think is awkward?" ”

"If it's awkward, then it's a lot of it, it's like a Guangliang gate, the only thing that is not coordinated is the door, in other directions, it's awkward except for the door."

"Then you can help see where the key should be inserted."

Zhang Gong stepped forward and squatted down and said to Professor Chen teasingly: "What about you, don't sell it, now is not the time to study, Professor Chen, you should hurry up and announce the answer." ”

Professor Chen nodded and said, "The drum stones on both sides should be able to move in the middle direction, and the key jack should be under this base." ”

"Oh, then push it away and take a look."

"I tried it just now, but you and I definitely can't do it," After speaking, Professor Chen turned his head to Situ Fang and shouted, "Situ, come here and help remove this." ”

Situ Fang, who had been scanning the mountains on both sides, heard Professor Chen's call, hurriedly walked to the front, and according to Professor Chen's instructions, he forcefully moved the drum stone to the side. Sure enough, a hole the size of the three-faced Buddha appeared on the base, and after Situ Fang moved another drum stone with great force, the same hole also appeared. Professor Chen took out the three-faced Buddha and tried it on both sides, and all of them could be put down, but no matter how he pressed down, nothing happened.

Zhang Gong used a flashlight to shine on the bottom groove of the three-faced Buddha, and then looked at the hole on the base of the drum stone and said: "Lao Chen, I think this key is not so simple, you see the groove on the base of the drum stone, there are ten small protrusions in it, and the bottom groove of the three-faced Buddha also has ten adjustable contacts, so it seems that both sides have their own different password combinations, and those passwords should be related to the arms of the three-faced Buddha, adjust the password combination through the arm, and adjust the convex state on the base through the correct password combination, Thus the stone door was opened. ”

"Well, there are ten arms in total, which is ten numbers, so the complexity of this combination lock is quite high."

"This is okay, after all, there is a world of difference from the pure number from 0 to 9, each arm here represents on and off, and the number can be directly replaced by 1 and 0, the key is how do we know the correct password combination?"

"You sort through all the clues here, and see if there's any hints that might be there."

"Don't ask me about this, I think everything is a clue now, and it's not a clue, I'm out of ideas now."

"Well, it's true, everything that's going on here is messed up and a little dizzy, so what's the password? You can't try them one by one, right? ”

"What did the grave keeper whisper to you?"

"That's the mantra in the passage, so we can get in and out."

"Then you can study this code yourself, I'll start my work now, to find out if there's a problem on both sides of this door, I think it's very delicately designed here and there, it won't be that simple."

After speaking, Zhang Gong took the two of them and commanded them to start the detection work with the three-dimensional imager, and he himself watched the screen display on the side and drew the structural diagram with paper and pen.

After Professor Chen turned off two-thirds of the flashlight, he sat down by the drum stone and fiddled with the three-faced Buddha. I saw him take a look at the base of the drum stone, and then look at the three-faced Buddha, back and forth for a long time, as if remembering something, so he took out the long tweezers from his backpack, reached into the base of the stone drum, and carefully pressed down the raised points one by one.

Zheng, who had never been to the ancient tomb, looked at it for a long time, and was already anxious, so he walked up to Professor Chen and said casually: "Old Chen, do you think this password is related to the Disaster Song?" ”

Professor Chen, who had lost his thoughts, suddenly heard Zheng Suo's casual remarks, and immediately asked excitedly, "Oh? You talk about what you think. ”

"I don't have any idea, I just think that since everything here is based on the Three-Faced Buddha, and the Three-Faced Buddha is a hint in the Martyrdom Song, I wondered, could this password be related to that song?"

Professor Chen's eyes began to light up, and he asked, "Well, tell me about it, what kind of association method?" ”

"I haven't thought about it specifically, but I think the password might be hidden in the lyrics."

Professor Chen nodded and said, "Oh, I don't have any ideas anyway, so let's try it," After speaking, he shouted to Zhang Gong again: "Old Zhang, you tell me the lyrics of the Disaster Song." ”

Zhang Gong, who was concentrating on drawing, was slightly stunned when he heard Professor Chen ask for the lyrics, and said with a stupid voice: "Old Chen, the password is in the song?" The lyrics are 'People are boiling and hissing in a beautiful scene, it has turned into clouds and smoke, fertile territory, also barren, full of corpses and bones, hot blood and cold, looking at Sangzi in the car, tears, raising his head, looking at the sky, thousands of miles away, lying in the cellar, sheng song is like a dream, it is difficult to drink and is poor, trying to make a big plan, but he is blind, building a city, looking back, and the ground is hurt,' these nineteen lyrics have no numerical prompts. ”

Professor Chen muttered the lyrics and said, "There are nineteen sentences in total, and the password combination is ten digits, so this must not be right, it seems that this direction is wrong." ”

Zhang Gong on the side was guided by Professor Chen's train of thought, and immediately became inspired, and immediately said: "Old Chen, I think I know what the password is!" It's all about the lyrics! ”

"What's the connection?"

"The ancients wrote songs vertically from right to left, and every time they wrote a sentence, they broke the line, and when they wrote the lyrics, they would also write the title of the song, and if the song title and lyrics were added together, it would be 20 sentences."

"What do you want to say?"

"20 sentences, add the first and last two numbers of the lyrics, the singular number is the top, and the plural number is the bottom!"

"Oh, got it, try it now!"

After speaking, Professor Chen took out his chalk and wrote the numbers on the ground: 3, 7, 5, 3, 3, 3, 3, 5, 3, 2, 3, 3, 4, 5, 3, 2, 3.

After writing, Professor Chen said to Zhang Gong: "Add the head and tail, and the combination of numbers is 6, 9, 8, 8, 6, 7, 8, 9, 6, 5, let's try?" ”