The sun gradually sank in the west, the sky finally became cloudless, the sun slowly lost its intense heat, and gradually became softer, and the shadows of the trees were dragged to the ground by the setting sun for a long time. In the noise of cicadas, it becomes more and more unusually quiet and leisurely.

But the three professors, teachers and students, were beating wildly in their hearts at the moment, they kept looking at their pocket watches, according to the records of the professor last time, the moment when the strange projection appeared was 6:25. As the moment approached, all three stared at the tombstone. The sound of each other's heartbeats and the subtle sound of the horn as the pocket watch moves around, you can all seem to hear it.

When the time on the pocket watch was 6:25, there were still only mottled shadows on the tall white marble tombstone, and there was no strange shadow.

6:26 min...... 6:27 min...... At 6:28, there was still no abnormality on the tombstone, and the professor really wondered if there was something wrong with his pocket watch, but how was this possible? The pocket watch he used was the Han's 4992B, which was specially equipped on fighter jets, with accuracy and stability, absolutely trustworthy, and was the most advanced military pocket watch, and even many senior generals in the United States used this kind of pocket watch.

In this way, I waited for about twenty minutes, and it was still as usual. The three of them felt that that kind of shadow may also appear from time to time, and it will not appear every day in a fixed period of time.

Just as the three of them were a little relaxed, suddenly, I heard a student pointing to the tombstone and exclaiming, "Look, that shadow has appeared, but it seems to be the shadow of three people."

The professor and another student immediately turned their attention to the tombstone, and sure enough, three clear figures appeared on the tombstone, and above the clear figure, there was still the shadow of a stone.

After reading it, the professor exclaimed, "Everyone disperse and go back." Before the words fell, the tall white marble tombstone actually fell in the direction where they were standing, and the three of them exclaimed in surprise and hurriedly fled in all directions. The huge stone monument, which was seven or eight meters high, collapsed with a bang, shaking half of the valley and rumbling, and after smashing on the ground, it fell into broken stones and scattered with dust.

The three of them ran out for about ten meters, standing there in shock, panting for breath. This qiē was simply unexpected. Even the mentor didn't expect it, but it's no wonder that the tutor didn't come to the scene in person, but just listened to him briefly introduce the situation in the message, and such an exchange will inevitably produce all kinds of errors.

The professor was stunned for a while, and then hurriedly took out the tutor's message and read it. Because according to the original plan, the mentor spent a lot of space in the telegram telling him how to use that shadow to determine the whereabouts of the Taoist priest in case that shadow appeared on the tombstone again. But what happened in front of him was unexpected, and the professor was really a little at a loss what to do next. He wanted to read the tutor's message again to see if there was any information missing, and with what he knew about the mentor, he did not believe that the mentor would misjudge.

However, the result was still a little disappointing for the professor, because the message in the message was indeed the same as the one he had already read, and he did not find anything new.

He folded the message in disappointment and was about to put it back in his pocket, when suddenly, the professor found that on the back of the message, there was a line of words because that side was already full, so this line could only be written on the back He had never noticed that there was such a line on the back before, and quickly read it carefully, that line of words was: In case of accidents, check the base of the tombstone.

The professor was in ecstasy, he was not mistaken, and the insight of the mentor was still so amazing. He gave a brief explanation to the two students, and the three of them began to carefully examine the base of the tombstone.

The base of this tombstone, which is made of granite, is the size of a house, and it is a whole piece, such a large piece, I don't know how it was mined and polished at that time.

The professor knocked on the sapper shovel, and judging by the sound, it seemed as if the pedestal was not solid. He examined the fracture between the tombstone and the pedestal, and found a black, fist-sized hole leading into the pedestal. A student took a small steel hammer from his kit and slammed it on the hole, which suddenly became the size of a bowl. They shined their flashlights inside to see what was inside.

The hole was not as deep as they thought, only a little more than ten centimeters to the bottom. And at the bottom, there are two compass-like things, each the size of a palm.

The professor stretched out his hand and pulled out the two things, and laid them on the stone, and the two students came over, and the three of them looked at the two things carefully, which were actually two stone slabs, which were polished extremely smooth, and had some strange patterns engraved on them, and in addition to that, there were some words.

The professor felt that these patterns were very similar to the kind of "array diagrams" in the war book. What exactly is it, this will be studied after going back, and the patterns on these two stones are extremely detailed and clear, and they are also painted in different colors, which are very clear and eye-catching, like two exquisite works of art.

This investigation, although there is no heavy discovery, but it is still a little rewarding, but this place is indeed full of dangers, and they are all invisible dangers, maybe they will suddenly appear at any time, which makes people unguardable. Therefore, the three of them felt that they should return to Hangzhou overnight and not stay here for a moment.

As soon as they said they were leaving, the three of them hurriedly packed up their things, took a compass and a flashlight, which were two things necessary to go back at night. Of course, the most important thing is that they stuffed those two stone slabs into their bags, which was the biggest reward of their trip.

It was getting dark. In the mountains, the sky seems to be dark when it is dark, and ten minutes ago I thought the light was okay, but after ten minutes it was dark. The three of them had to turn on their flashlights and follow the direction of the compass to make a difficult journey through the mountains.

"Summer day, child's face", said to change, the evening is still clear sky, I didn't expect that as soon as the sky is dark, there are more and more clouds in the sky, and it is still a little stuffy. All three of them were very worried that if it rained, it would be bad, because it was summer, and if it rained, it would definitely be a thunderstorm, and if you experienced a thunderstorm in the mountains, it would be too dangerous.

It was a cloudy day, and the night became very dark. If you turn off the flashlight, you feel like you can't see your fingers. You can only see it where the flashlight shines, and you can't see the shape of the mountain or the changes in the terrain in the distance. The three of them felt very depressed at once, and they had no sense of direction at all. In other words, the range they can perceive is only where the flashlight light reaches.

The three of them walked for more than two hours under the guidance of the compass, everyone shouting and panting, and the water in the kettle was almost drunk.

However, the three of them had a strange feeling that the more they walked, the more wrong they were, at this rate, they should have basically gone out of the mountain, but why did they feel that they were still walking on the rugged mountain road, and there was no sign of going out of the mountain. Is it a mistake?

But they have been walking according to the compass, how can the direction be wrong? The three of them stopped and carefully examined the compass, but found nothing unusual. The professor frowned again and thought for a moment, as if he remembered something, he took a pair of scissors from his toolkit, and then pulled out a white shirt from the bag, which he cut into strips of cloth. The two students immediately understood that the teacher was making signposts.

Sure enough, as he walked, every short distance, the professor would tie strips of white cloth to the trees and tall weeds that passed by. In this way, after they had been walking for about 40 minutes, suddenly, a student seemed to see something on the tree next to him in the afterglow of the shaking flashlight, and when he shone the flashlight at the object, he couldn't help but exclaim: "Look, the professor's white cloth, it turns out that we have been going in circles, and we haven't gone out at all."

The three of them hurriedly ran over to check carefully, and sure enough, it was the mark made by the professor, and they had indeed been circling in circles all along. The professor realized that the compass had failed.

And there are many reasons for the failure of the compass, such as encountering high temperatures, encountering magnetic fields, etc. Is it the failure caused by high temperatures? Of course not; Is it a malfunction caused by a magnetic field? If the mountains in this area really have a strong magnetic field, then why didn't the compass fail when it came in?

He suddenly thought of the two strange stone slabs, yes, they must be the slate in the bag, which interfered with the pointer.

In the darkness of the night, the compass had failed again, and they could no longer tell where they were. There was no other way, but I had to stay in the mountains for the night and talk about it after dawn. The three of them put down the bags on their backs in frustration, found a relatively large rock, and the three of them climbed up.

As soon as their spirits were relaxed, the three of them suddenly felt very tired. The trek in the mountains in the past two days, and all kinds of experiences, really made them a little exhausted, and tonight it was very strange to get lost like a ghost hitting the wall, what the hell is going on?

However, none of them dared to fall asleep steadily, because the weather was still a little hot, and no one knew if there would be sudden lightning and thunder. So, the three of them were on the boulder, trying to control their fatigue and waves of fierce sleepiness. It was still pitch black, and there was no sound of unknown animals moving in the grass, and each of them had a knife or a shotgun in his hand.

The professor still let the two students sleep, leaving him alone to "stand guard", but this time the two students felt that the professor was too hard, so the three of them agreed to take turns to rest and two people to sleep, one person was awake and vigilant around the one qiē, and the professor thought it was a good way. However, what moved the professor was that the two students did not let him "stand guard" as agreed, but they rotated with each other without disturbing the professor and letting the professor sleep sweetly all night. So, this difficult night was spent in this way.