Lin Fatzi estimated that after the leader of this group of rats was eliminated by the worker ants, he should not come to harass them again in the short term, so he summoned all the lizardmen he brought to the truck, and after Zhang Xiaoya started the heavy truck, Lin Fatzi let these lizardmen be on guard, and returned to the safety point without encountering any danger along the way.

Xue Wei and Xia Siying saw Lin Fatzi and their heavy truck coming from a distance, and ordered their team members to open the entrance door for them early.

After Zhang Xiaoya drove the car steadily into a safe spot, everyone got out of the car, and Xue Wei and Xia Siying hurriedly stepped forward to ask them about the trip.

"Let's go to Professor Cao first, and then I'll talk to you in detail." Lin Fatzi beckoned Xue Wei and Xia Siying to rush to Professor Cao's laboratory together, only to see that Professor Cao was studying with Han Lei and them on how to use electrolysis to purify the rare metals on the shells of those iron ants.

"Professor Cao, when we went to the Military Museum just now, we found a strange device, please take a look at it." Lin Fatzi said, and took out the small electronic device that was cut off by Zhang Shuya from his pocket, and the red light on it was still flashing at this time.

Professor Cao lifted the glasses on his nose, and then took a closer look, while he was studying the electronic device in his hand, Lin Fatzi briefly explained to the people around him about the leader of the mutant giant rat that he and Lin Ruoqing and the Zhang sisters encountered, Xue Wei and Xia Siying heard that several of them had experienced such a tragic battle just now, and they all sweated for Lin Fatzi and them.

Fat Lin was like a normal person, observing Professor Cao's every move intently, anxiously waiting for the results of his examination.

"I'm studying machinery, these sophisticated electronic devices are really not specific, but this looks like a remote-controlled injection device, with a spiral push rod connected to the motor, which can control the pressure in these medicine warehouses, as for what these drugs are, I think you can consult Dr. Xue, this is really beyond the scope of professionalism." Professor Cao said, handing back the device in his hand to Lin Fatzi.

As soon as Xue Wei heard that he was going to consult his daughter, he offered to call her over in person, Lin Fatzi remembered something, and then asked: "Professor Cao, you just said that this is a remote control device, is there a way to track down the behind-the-scenes operator of the remote control device?" ”

Professor Cao frowned, and then said: "All remote control devices need to receive the signal of the corresponding frequency band, and now we have no way to locate the location of the remote controller directly through the remote control signal, but I can find a way to figure out the remote control frequency band of this device, it is the end of the world, the power supply of the city should be terminated, as long as the signal strength of this remote control frequency band can be tracked, the location of the signal transmission device can be roughly located." ”

According to what he could understand, although they could not directly locate the position of the controller, they could roughly distinguish the direction of the sender through the strength of the signal.

"Professor Cao, how long will it take for us to determine the signal frequency used by the remote controller of this device? Do we have any equipment for tracking signal strength in place? Lin Fatzi asked Professor Cao about the issues he was most concerned about now.

"The equipment is ready-made, and as for determining the frequency, it will probably take some effort, and I will start working on it now, and I should be able to get back to you later today." Professor Cao replied while thinking.

After hearing this, Lin Fatzi nodded, at this time Dr. Xue also came with her father Xue Wei, Lin Fatzi handed over the electronic device in his hand to Dr. Xue to check, she took a brief look, and said to Lin Fatzi: "The medicine in this, I need to take some to do some pharmacological experiments, and I can't give you an answer yet, but like this, there is a medicine that is not completely isolated from the air at room temperature, I don't think it should be a harmful substance such as a virus that needs to be kept alive at low temperature." ”

Lin Fatzi nodded, he had already scanned the potions in it through his virus scanning ability, and only brought it back here after confirming that there was no virus, and then Doctor Xue transferred the remaining potions in the medicine warehouse to a syringe that he carried with him, and Lin Fatzi handed over the electronic device seized from the back of the giant rat leader to Professor Cao for study.

Then Lin Fatzi and the others returned to the lounge, Hu Jing prepared dinner for them, Lin Fatzi and the Zhang sisters went back and forth to the Military Museum twice today, and they didn't have time to eat lunch, naturally they were already hungry with their chests and backs, and the food brought by Hu Jing was swept away by them in an instant.

Lin Fatzi didn't know how long Professor Cao and Dr. Xue's research would take, he had already exhausted a lot of physical strength after a whole day of traveling, and now that he had recovered some strength through Hu Jing's cooking ability, drowsiness hit him, and he fell asleep on the bench in the lounge.

I don't know how long it took, Lin Ruoqing shook her sleeping brother awake: "Brother, Doctor Xue and Professor Cao are coming to you, wake up quickly." ”

Lin Fatzi woke up slowly, and saw that it was already dark outside, so he hurriedly wiped the saliva from the corner of his mouth, and followed Lin Ruoqing out of the lounge.

Professor Cao, with the support of Dr. Xue, was already standing outside, and when he saw Lin Fatzi walking out of the lounge, he hurriedly said, "The device you handed over to me, I have roughly mastered the remote control frequency." ”

Saying that, Professor Cao picked up a mobile phone-sized instrument in his hand, leaned in front of Lin Fatzi and said: "This is a hand-held signal detection device, which was originally used to check the signal strength around the mobile phone signal transmission tower, and now I have adjusted the frequency band of the signal it detects to the same frequency band as the remote control signal of the electronic device, let me teach you how to use it." ”

As he spoke, Professor Cao pointed the instrument in his hand in different directions, and as he pointed, the value displayed on the instrument also changed.

"The stronger the signal, the larger the number displayed on this instrument, and vice versa, the weaker the signal, and the final position of the transmitter can always be found through the strength of the signal." Professor Cao explained to Fat Lin while operating.

Lin Fatzi nodded, but there was still a question in his heart: "Professor Cao, we can only judge the strength of this signal, there is no way to judge the distance, even if I can find the direction from which this signal is coming from, this control signal is 108,000 miles away from us, so how can I find the manipulator behind the scenes?" ”

"I've also thought about this problem, you don't have to worry, the wavelength of the signal at this frequency is relatively short, and there is no way to travel so far that it will be attenuated, I estimate that the sender of this signal is within 30 to 40 kilometers of our distance, otherwise our receiver will definitely not receive such a weak signal." Professor Cao solved Fat Lin's doubts, and then Fat Lin looked at Doctor Xue and asked her about the potions in the potion warehouse.

"Those potions should be ordinary adrenaline, I've done experiments, but it's just to improve the ability to target stress in a short period of time." Dr. Xue said.

After hearing this, Lin Fatzi nodded, since Professor Cao said that this manipulator was within a radius of thirty or forty miles from them, then he had to find a way to find this controller who could control the giant rat swarm as soon as possible, he decided to set off now while it was dark, and he must not let this mastermind behind the command of the giant rat swarm attack the ant nest have another chance.

Mobile Station: