Coupled with the current sound that Gu Yunnian said, Ye Tianshu analyzed, "It should be an infrared thermal induction detector." ”

No matter how much they hide, the heat of the body cannot be hidden.

Gu Yunnian's eyes rolled, "How far is the infrared thermal detector?" How wide is the detection range? ”

"Not necessarily, a small range of a few meters, dozens or hundreds are possible. wide, even more than a kilometer. Ye Tianshu explained to Gu Yunnian in a whisper, but it was the same as what Mu Sichen told her.

"Haven't we been discovered?" Gu Yunnian frowned slightly, but it was not right, if they were discovered, they would have been surrounded a long time ago.

"There shouldn't be any, the long-range infrared detector mentions a huge inconvenience, in this case, it is enough to use tens or hundreds of meters."

Ye Tianshu replied, and Gu Yunnian saw Ye Yuheng take out some things from his backpack and assemble them into something like a gun, and he didn't want to.

In the front, it looks like it is only five centimeters in diameter to receive satellite signals, with the lid of the antenna stretched out, and there is a palm-sized display screen in the back.

"It's a signal sensor." Ye Yuheng said.

Gu Yunnian didn't expect him to open his mouth to explain to her, because among the six people, Ye Yuheng's personality was the least talkative.

Then Gu Yunnian saw a string of characters appear on the display screen, she couldn't read it, but she could see that Ye Tianshu and their expressions were dangerous and solemn.

"We are already in the detection range of the infrared thermal detector." Ye Tianshu said in a deep voice, it was his negligence, he didn't expect the institute to be so close at first, they would take out the long-range infrared thermal induction detector so generously, so they didn't use the signal sensor.

But if they were discovered, how could they not move?

Gu Yunnian suddenly thought of a possibility, "They want us to throw ourselves into the net and catch us alive." ”

As for what the people do to catch the work, one is interrogation, and the other is.

"Damn, pay attention to my aunt, and my aunt will have to let them experience what it means to regret it."

The thought of what those people wanted to do made Ye Tianxuan a little furious.

Ye Tianshu personally protected Gu Yunnian behind him, said carefully, and continued to move forward as if he was unaware, but he was thinking of other ways in his heart.

He looked at Ye Yuheng, "In addition to the infrared thermal detector, are there any other detectors?" ”

"No more!" Ye Yuheng replied.

Ye Tianshu looked at Gu Yunnian, "Look at the back of us, is there anyone." ”

"Yes, many, hundreds, more than a thousand meters away from us, but they're getting closer." Gu Yunnian said what he felt.

Ye Tianshu said decisively: "Let's retreat, get out of the infrared detection range, and go east." ”

There is a river to the east, which is located in the tropics, and further into it is a tropical forest.

A river in a tropical forest is no safer than a forest.

As soon as they retreated, the other party discovered their intentions, Gu Yunnian immediately rushed to the back, and the speed of the people surrounding them was accelerating, and there were people from the side in front of them.

Gu Yunnian told Ye Tianshu about the change, out of the infrared range, more and more people rushed to catch up, and the distance was getting closer and closer, Ye Tianshu stopped for a while and did some simple traps.

Gu Yunnian saw that Ye Tianshu gave an order, and Ye Kaiyang immediately became busy.

The ground is tied between the two trees with a special opaque black thread, and a pair of sharpened branches are inserted on the ground not far in front.