Squeak~squeak~" Li Yifan immediately recognized the sound, which was obviously the sound of mechanical rotation, he looked up, and saw a dark green square in the densest part of the woods, and moved his feet on both sides to look up, only to find that there was a camera that was painted with green paint.

"Did you hear that?" Han Shuo looked at Li Yifan's actions, obviously he was the same as himself, he heard the 'squeak' sound, and watched Li Yifan beckon Han Shuo to come over, Han Shuo cautiously walked in the direction of Li Yifan.

"Look what it is." Avoiding the position of the camera, Li Yifan motioned to Han Shuo to look up, to be honest, if it wasn't for him eating two T-30s, it was very likely that he would be like Han Shuo, thinking that the sound of some animal flashed and ignored it.

"Camera? How can it be ...... here" Han Shuo looked at the camera on the tree that made two more 'squeak' sounds, it should be that today's heavy rain caused some malfunctions in the camera.

"Did you say the people in there noticed us?" Han Shuo asked Li Yifan in a low voice who was looking around the tree trunk.

"Even if we do, we'll have to find the entrance and get in." Li Yifan said, took out the saber that came back to him later, and moved it on a book cover, and soon, he got the fake bark made of model cement, and a PVC pipe appeared on the surface of the trunk.

"If you follow this search, you should soon be able to find the entrance to the scientific research base." Li Yifan dug down the PVC pipe, and soon the pipe hidden in the soil was also dug out by him.

"You kid can, you know this little dose of the electrician." Han Shuo followed Li Yifan to dig together, while not forgetting to praise Li Yifan.

"Common sense problem, this kind of damp place, only PVC is resistant to folding and corrosion, the research base has been built for so many years, and the wires outside are hidden in the PVC pipes, which is the most commonly used and most convenient way for electricians to walk the line a few years ago.

And there is no electricity around here, the most direct thing is that the underground pipe is directly connected to the research base, and the people who can call Shen Jiayi have hurried over, and they may be able to catch a few people if they go in. Li Yifan said to Han Shuo while speeding up the movement of mixing soil in his hands.

"Hey, you two, don't look around, hurry up and call Shen Jiayi over, there's a discovery here." Han Shuo deliberately avoided the camera overhead, and said to the two police officers who called Shen Jiayi not far away to watch the two of them.

When the two heard that there was a discovery here, they couldn't help but be stunned at first, then stood there and looked at Li Yifan who was digging the dirt for a few moments, and after a pause, only one person ran in the direction of Shen Jiayi, while the other person walked to Li Yifan's side and helped find the pipe buried in the ground together.

"It would be nice if a metal detector could detect plastic pipes." After roughly understanding what Li Yifan and Han Shuo were looking for, the police officer who helped couldn't help but complain.

"Why did you bring a metal detector?" Han Shuo couldn't help but ask funny, admiring this Shen Jiayi a little more.

"Yes, this scientific research base must have metal anyway, and it is most convenient to use a metal detector to find it." The officers couldn't help but talk about the reason why they were wearing metal detectors.

"She might as well bring an X-ray scanner, so maybe she can find the ancient tomb in the mountains in any year." Hearing this, Han Shuo couldn't help but joke.

"It can be detected that there are wires in this plastic pipe, and copper wires in the wires, which belong to metal." Li Yifan completely ignored Han Shuo's boring joke, but straightened up and said to the police officer who was stunned by him: "We are looking for the line pipe buried underneath, and the metal detector should be used." ”

"Okay, I'll have someone bring it over." As soon as the police officer heard that it was possible, he immediately turned around and returned to the crowd that had come to rest at that point one after another.

'Squeak' There were two more sounds above their heads, and Han Shuo and Li Yifan couldn't help but look back, to be honest, when Han Shuo first heard it. He only thought it was the call of a small bird, and at this moment, the sound sounded again, and he subconsciously looked up at the dense leaves above his head.

"Do you want me to go up and pick that thing up?" Han Shuo looked at the faintly visible camera and asked Li Yifan.

"Forget it, it is estimated that it has been discovered a long time ago." Li Yifan said, looked back at the height of the tree and said. "Your leg doesn't hurt anymore, if you fall down this tree, it's not just a scrape of the skin."

"Well, let's stop, that kid over there brought something, we still use that thing to measure, if we dig down, I don't know when we will dig it." Han Shuo said and greeted Shen Jiayi, who came together.

"How's it going, did you find the entrance?" As soon as Shen Jiayi came, she skipped Han Shuo and walked directly to Li Yifan and asked.

"You need your equipment to detect, there should be more than this line down here, and the cameras around here have found two, we should have been discovered a long time ago, and now we can only hurry in." Li Yifan looked at Shen Jiayi and said his thoughts.

"Okay, I see." Shen Jiayi said, and beckoned the three police officers with instruments behind him to come over, and searched around the two circuits buried in the ground dug up by Li Yifan.

"The induction is very weak, it should be something else added to the PVC pipe, if it weren't for the advanced equipment we brought, I'm afraid I can't even sense a signal, so I can only dig by hand." The strong man who often appeared next to Shen Jiayi said to Shen Jiayi after testing the signal.

"If there is a line buried underground, then the possibility of the scientific research base here is quite large, the three of you continue to explore, and the others follow the detected place to mark the turning point and overlapping point of the line, so that you don't take a heavy route when searching." Shen Jiayi gave an order, and while looking into the walkie-talkie, the nearest team of people who were still probing in the forest, according to the topographic map, asked them to guard the route that could go out near this cliff.

"Team leader, over here." In less than ten minutes, Shen Jiayi heard three people finally gathering in the distance, and the detector in their hands sounded in front of a stone wall. "In the end, it all ended up in this piece, but there was no road ahead, only a stone wall."

"Stone wall?" Shen Jiayi walked over and touched the cold and rain-carrying stone wall in front of her, knocked a few times and found no problems, and then looked at the surrounding plants the same, and even took things and pulled on the ground in front of the stone for a long time, this stone wall was still there, not moving at all, and there was not even a complete joint around it.

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