Zhang Gong saw that the hole used to divert water could not continue further in front of the mountain in the back room, and said to Professor Chen blankly: "Old Chen, this is the end. ”

Professor Chen said: "Lao Zhang, it is impossible to completely dig such a long hole in the ground, after all, the hole below is too small, and it is impossible for people to drill into it to work, so this hole should be dug in sections that year, and after the excavation is completed, it is paved with stone slabs. There must be something hidden on the mountain, you see that this wall is not excavated from the mountain, just like the road of the temple of the underworld, this also belongs to the three hundred taels of silver here, which can be completely dug by the mountain, why is there still a large stone brick to make the wall here? Are you working hard enough these days and not sleeping well? I feel like you're not concentrating today, so if you can't do it, let Ma Kai come, and you can go back and rest. ”

"It's okay, it's just that the quality of sleep is a little worse, it's okay, I'll follow this hole, knock on these stone bricks one by one, if there is an article, it must be behind the stones."

Sure enough, after Zhang Gong knocked on the stone bricks above the hole, he soon found that the sound of the second stone hitting the ground was abnormal, and the sound was obviously muffled. This means that the back of this stone brick is empty, and it is very likely that the key to the opening of the mechanism!

Zhang Gong used a small shovel to slowly dig out the clay in the cracks of the stone bricks, and after reaching through the small hook made of steel bars, he pulled out the stone bricks smoothly. As the stone bricks were pulled out, in addition to the obvious sound of running water, the mystery behind it was also exposed: there was a square stone above the hole pressed against the skin of an unknown animal, and the slight resurgence of moisture indicated that there was a water source below. After opening this stone, it turned out that below was a particularly smooth groove that was manually excavated and polished, and then it was a shrunken groove, and the top was also a stone pressed with animal skin, and then opened, and finally you could see the secret inside: there was a stone bar less than 30 centimeters wide inside, which played the role of a sluice gate, stuck on the polished smooth stone ridge, and completely sealed the chiseled hole on the mountain.

Zhang Gong raised his head and looked at Professor Chen, did not speak, and silently lifted the stone bar up. As the stone strip was pulled out, the water in the dark river behind it flowed through the hole and flowed to the circular river of the Hades Temple. Professor Chen picked up the stone bar and looked at it and sighed, "Look at this process, it's perfect!" This stone bar is smooth and can not be smoother, and the pedestal on the mountain is also polished as flat as this, which seems simple, but in fact, it also shows the attitude of the ancients. ”

"Don't sigh here, go to the Hades Temple, see what changes, if this is really the key that can open the secret passage below, after the Hades Temple is full, you must quickly block this again, otherwise the water will flood the Golden Mountain."

"With such a flow rate, it is early, and it is estimated that there are no hundreds of tons of water to feed the bentonite, but we should go and watch it."

When I arrived at the Hades Temple, I found that the team members who were originally working in their own places were all gathered around the edge of the circular river after hearing the movement of the water. Feng Weiguo, who had been in the cave on the edge of the road, saw Professor Chen and them coming, and hurriedly stepped forward and asked, "Professor, what's going on with this water?" ”

Professor Chen looked at Feng Weiguo and a group of curious eyes on the side of him, and knew that it was lecture time again, so he said kindly: "We have found the entrance to the tomb in this tomb, in the center of this temple, that is, the place where the chess endgame was originally placed, and now we all see a big pit, but there is a hidden passage under this big pit, this passage is very ingeniously designed, sealed by four stone slabs, like the common mechanism in the tomb, this is also a flap structure, It's just that the trigger is not a traditional gravity imbalance, no matter how much counterweight you put on the edge of these stone slabs, it will not cause the stone slabs to fall over, and the mechanism here is to get stuck under the four stone slabs that were originally balanced at one end and hide them, so what role does the river play here? Now I will tell you the relationship between the river channel and the flap, the river is wide and narrow at the bottom, and the mineral soil with expansion ability is placed below, after discovering this, we will judge that the four stone slabs below are through the soil in the river channel after the water expands, eject the safety device below, and then the slate falls under the interaction of the expanded pressure and natural gravity, and the channel is opened. ”

"Professor, what does the soil look like underneath? Why do you make sure this is the key to open the slate? ”

"At the beginning, I didn't know what this soil was used for, but it was discovered by my son Chen Zhijun, who studied geology and was proficient in these comparisons, and he told me that it was bentonite, and the water absorption rate could reach 8-15 times that of itself, and the expansion rate was amazing, and it could reach 30 times that of itself. As for why you said that confirmation is the key to open the passage, the question is very simple, as long as it is confirmed that there is enough space in the back half of the slate for it to fall down, then there is no trigger point in the light, to borrow the theory of objective idealism 'existence is reasonable', the use of bentonite in the river itself is not a normal thing, and the edges of these slate are still pressed under the riverbed, so why is this necessary? For me, coincidence is a combination, and a combination is an objective fact. ”

"Professor, what's down here? When the slate is turned up, won't so much earth cover the entrance below? ”

"What will it be, this point still needs us to discover together, now we don't know what is below, what we can know is that the following is definitely not the Eastern Han Dynasty; As for the problem that the soil will fall out and block the entrance below after the flap falls, I think there are only four holes under the river to resist the safety of the mechanism, and there will be no problem of the soil falling out after the slab is turned up. ”

As the water continued to inject, the yellow sand in some places had been obviously lifted, and after looking at his watch, it was almost 6 o'clock, Professor Chen said to Feng Weiguo: "Director Feng, you take them to dinner, here arrange for three people to watch in groups." ”

"Professor Chen, you go first, there shouldn't be anything happening in the first class, I'll just look at it, according to this kind of current, it should not be found until the second half of the night."

As soon as Professor Chen walked to the entrance of the cave, the phone rang, and the name of Sun Ju was displayed on the screen. Looking at a few people around him, Professor Chen slowed down and softly connected the phone: "Hey, Sun Ju, what instructions." ”

"According to the surveillance, the mysterious man just sent another message, he predicts that you will open the secret passage in the middle of the night, and he may slip in."

"It doesn't matter, in addition to a few of us at night, you will also be accompanied by your police officers to guard the Hades Temple, and the armed police at the entrance of the cave will not move."

"How do you need us to cooperate?"

"Just arrange a few more gun-wielding police officers to go to the Hades Temple, if the secret passage is opened, you still need them to go down together."

"Is it dangerous to go down?"

"There is danger, but it won't be the ghosts in the movie, it's just natural phenomena and mechanisms."

"Okay, will you let people in the cave tonight?"

"Let them go, but only let them be in the temple of Hades, not allowed to go down, and give them some signals to think that we don't know anything."