Liu Xiaodong's voice came from the walkie-talkie on the ground: "Guo Yixin, can you see my car now?" ”

Guo Yixin picked up the walkie-talkie and pressed the send button: "I can't see it!" Are you going to do this test? ……”

"Haha, Brother Xiaodong! I don't have to do this test, I know it, I can't see it. Wang Zhong's voice came out of the walkie-talkie. He'd seen the hollow and knew the depth.

"Haven't you started yet...... Now, Guo Yixin, you go to the sand I turned over! ”

After Guo Yixin walked over, she asked, "And then?" ”

"Okay, you come out again!"

Guo Yixin frowned slightly, and walked out again: Well, it's already out! ”

Wang Zhong was curious, kept holding the binoculars, looked at Guo Yingxin's side, and then looked at the recess, muttering: "What is this brother doing?"

"You go twenty ......or thirty meters further," Liu Xiaodong said, again.

Guo Yingxin did so seriously, and kept looking back to determine the distance she had traveled.

Wang Zhong held the binoculars and grinned, and said to himself: "These two people are really working together...... What I'm most afraid of is that I'm going to do something inexplicable......"

"Okay, the test is over, thank you, Guo Yixin! …… Brother Wang Zhong continues to be vigilant! ”

Although Liu Xiaodong couldn't see Wang Zhong, he could guess what he was doing.

After turning the free light back into its original position, Liu Xiaodong walked up to Guo Yixin and asked, "Is there anything abnormal?" ”

There were three Yadans here, and this was the last one she checked, the oval Yadan. She shook her head: "It's all a dull thump and can't be hollow...... What experiments are you doing? ”

Liu Xiaodong looked at the direction of the depression and touched his chin: "I speculate that the murderer was hiding in the depression, secretly monitoring this side with a telescope, and detonating it remotely after the victim entered the explosion zone they set up...... But......" he sighed.

"What's wrong with that?" Guo Yixin turned her head to look at him.

"Yes, because that can't be done...... I was just watching you walk back and forth with a telescope on the edge of the hollow, and I couldn't pinpoint your exact location...... It's too far away! ”

Guo Yixin frowned: "Then the murderer used other methods...... And what about surveillance from a high altitude with a drone? ”

Liu Xiaodong looked up at the sky and shook his head: "The first thing I thought about was the drone, but the drone is too conspicuous, if you use a very small drone, it will be blown away by a strong wind here, and it is impossible." ”

"Either it's an automatic trigger device that doesn't need to ......be controlled by people," Guo continued to speculate.

Liu Xiaodong didn't think about it, and blurted out: "Your group is running into that area one after another, and the trigger detonation is actually difficult to control." Do you think what if there are still many people who have not yet entered the blast zone and the explosion is triggered prematurely? ”

"Maybe it's not an ......explosion at all," Guo Yingxin sighed, and knocked Yadan beside him with the hammer in her hand with some venting emotion.

"That's right! However, the possibility of an explosion cannot be ruled out at this time. ”

Liu Xiaodong just lowered his head and pondered, but at this time, Guo Yingxin was attracted by something, and she bent down to observe carefully.

"Liu Xiaodong, look what this is!"

Liu Xiaodong walked over and found that there was a small hole on the Yadan!

"You just found out?" Liu Xiaodong looked at the sandy area next to him, this Yadan was the closest to the explosion zone.

"Didn't I just knock on it! Just knock out this hole......" Guo Yixin raised the small hammer and looked at it, and found that there was still some dirt stuck to the hammer head.

Liu Xiaodong carefully inspected the small hole, which was about half a centimeter in diameter and was facing the area where the explosion occurred, and the height was about 1.5 meters above the ground.

"Could it be a coincidence?!" Liu Xiaodong was like a doping drug, and immediately came to his senses.

"What coincidence?" Guo Yingxin's eyes widened.

"Wait for me to confirm it again......" Liu Xiaodong couldn't wait to take out his mobile phone and turn on the "flashlight" function. He stared at the hole from different angles and studied it for two minutes. In order to see more clearly, Liu Xiaodong ran back to the car and took out the flashlight.

He was secretly glad that he didn't forget to bring a flashlight when he really needed it this time!

With the help of the flashlight, Liu Xiaodong can see more clearly. This small hole looks deep and has a smoother inside. He found a wire and poked into the hole, but the wire was too short to reach the end...... Liu Xiaodong ran back to the car and took out a roll of wire. I stuffed the wire into the hole for a long time, and finally I couldn't stuff it in, and I pulled out the wire, and there were nearly two meters!

This small hole is almost as deep as the entire oval Yadan.

"Guo Yixin, can you go and change Wang Zhong over, I have something to ask him!"

"Hmm!" Guo Yixin turned around and walked away quickly.

"Brother Wang, is it normal to have a small hole in Yadan?" Before Wang Zhong approached, Liu Xiaodong asked from afar.

Wang Zhong came over and looked at it for a while, and said, "Some Yadan will have holes on it, but I haven't seen it as deep as this!" ”

"Why is the hole blocked, but the inside is very round and neat, the key is that the hole is straight! When the wire is plugged, there is basically no resistance...... I suspect it's a man-made hole! ”

"Artificial?!" Wang Zhong looked at him stunned, not knowing what the reporter had speculated.

Liu Xiaodong touched his chin with his right hand: "If I were the murderer, I would put a camera into this hole, and I can clearly see this explosion area......"

He gestured to the area ahead.

Wang Zhong's eyes widened, and he immediately reacted, and said excitedly: "You mean to put a wireless surveillance camera here!" And then hide in that hollow and remotely monitor the situation here? …… It's entirely possible! ”

Liu Xiaodong had regained his composure, carefully observing the dirt on the small hammer.

"There's something strange about this dirt!"

"Of course it's strange, this dirt is used to plug the hole, deliberately not to let others find out! This must be told to Officer Hu, Brother Xiaodong, you are really awesome......"

After Guo Yingxin came over from the Haval car, Liu Xiaodong told her his speculation, and after listening to it, Guo Yixin hurriedly took out her satellite phone and prepared to report the matter to Officer Hu.

"Go back to town and call on your phone!" Liu Xiaodong stopped her, "I know the police, they don't like outsiders trespassing on the crime scene, you call now, his mobile phone shows an unknown number, and he knows that we are here again......"

"Oh!" Guo Yixin put down the phone stupidly, "You don't know the police, I just suspect that you have been a policeman!" ”

"Huh...... When we got back, we said that it was only later that we remembered that there was such a possibility. ”

Liu Xiaodong took some photos of the small hole.

The three of them stayed near the panda Yadan for more than two hours, and found no other clues except for the suspicious hole on the oval Yadan. However, on the wall on the east side of the panda Yadan, there is also a hole more than half a person high, more than half a meter deep, this hole is relatively large, and your hand can reach into it. Nothing else is special. Seeing that the time was almost up, Wang Zhong reminded Liu Xiaodong that it was time to return.