"Lijun, don't read it," Noah said nervously.
But Lu Lijun continued to read the details of the file. Memories from the past flashed before his eyes when he saw the picture of another man: his robotics teacher.
"What is it, teacher?" a young boy's voice echoed in Lu Lijun's mind.
"Lijun, this is a new device my friend and I are developing. It's a tracker device."
"What is it for?"
"Umm, it has various uses, like tracking someone's whereabouts. For example, a police officer can attach it to a suspect's vehicle to monitor their movements and locations, which could help in investigations. Isn't it a noble cause?"
"It sure is."
"Now we are testing how far we can track a vehicle if we attach it. After class, my friend will hire a car, drive it as far as he can, and I will check. With the results we get, we can keep refining the device. But it's taking more time than we thought. To get data frequently, we have to rent a car all the time."
