"Li Yu, Wang Hongwei, is this USB flash drive the two of you?"

In the classroom of the literacy class, Zhou Zijun held a small USB flash drive an inch long and asked the two boys.

"No, where did it come from?" Li Yu shook his head and asked casually.

Wang Hongwei also shook his head, and Zhou Zijun frowned and said, "What I found in my schoolbag is what I saw after I went home the day before yesterday, I thought it belonged to you." ”

"Just ask the other students, maybe someone misplaced it." Li Yu said.

Zhou Zijun really followed to the podium and held the U for interrogation, but everyone shook their heads, saying that they had never seen this thing. Everyone in the literacy class is a blue-collar worker, and except for Li Yu, no one has a computer or uses a USB flash drive.

"Then you can keep it, a USB flash drive doesn't seem to be worth much." Li Yujian said.

"It's useless for me to keep it." Zhou Zijun said, she handed the USB flash drive to Li Yu and said, "Why don't I give it to you, didn't you say that there is a computer where you work?" ”

"It's fine." Li Yu was not polite, reached out and took it, and put it in his schoolbag.

Li Yu had already bought a computer, a desktop computer at home, a notebook, and a computer for his use in the office of the medicinal food workshop. He is now not only proficient in lol, but also has learned the application of word and excel, and is able to do some simple word work. The USB flash drive is something he needs to use in his daily life, and it's not worth much, so there's nothing embarrassing for him to take it.

"I'll go back and check what's inside, and maybe I'll find out who its owner is. In case there is an important text in it, maybe people are still in a hurry. Li Yu said.

"I don't care, I've already given it to you anyway." Zhou Zijun said with a grin, after the thrilling experience the day before yesterday, her relationship with Li Yu suddenly became much more intimate, and her speech became more casual.

It was already more than nine o'clock in the evening after class, and Li Yu and Wang Hongwei first sent Zhou Zijun to the bus, and then they each looked for a bus in their own direction. Li Yu didn't take the car home, but got on another road, just now when he was in class, Shen Jiaze sent him a prestige, saying that he had successfully trial-produced a small product, and asked him to go over and take a look, and he was now taking the car to Shen Jiaze.

The company jointly founded by Shen Jiaze and Li Yu has already obtained a business license. The company's site was in an office building called the "Golden Fortune Center", where Shen Jiaze was waiting for Li Yu at this time.

Li Yu got off the bus and walked towards the Golden Fortune Center, but faintly felt that there seemed to be a shadow following him behind him. He was a little more careful, and slowly walked into the gate of the Golden Fortune Center, and at the moment before entering the door, through the reflection of the electroplated door frame, he saw a figure dozens of meters away behind him, and then flashed behind a cluster of trees.

Could it be that Mei Tianfu's ghost is still lingering and sending someone to keep an eye on him?

A thought flashed in Li Yu's heart, seeing that the other party was not approaching, he didn't bother to pay attention anymore, went straight into the hall, and took the elevator to the room rented by the company.

"Li Yu, are you here? Why, class ends so late? Shen Jiaze came over and opened the door for him, greeting him with a smile.

"The car was delayed for a while." Li Yu said as he entered the door, he peeked behind him, and saw that the person who was following him did not come in, so he was relieved.

Shen Jiaze knew that Li Yu went to a cram school for migrant workers, and he also knew that he had always commuted by bus in order not to be different from his classmates. Compared to taking a taxi, taking the bus took more than half an hour, which is why he arrived so late.

"Brother Shen, you called me over in a hurry, what's the good thing?" Li Yu threw his schoolbag on the desk and asked Shen Jiaze with a smile.

"Absolutely good." Shen Jiaze said, "The pet tracker I told you last time, I have actually succeeded, you come with me." ”

The company's rented space is divided into two large blocks, one is the administrative office area, and the other is Shen Jiaze's real yàn room. Li Yu followed Shen Jiaze into the real yàn room, and saw a few small things on the real yàn stage, which were obviously new products that Shen Jiaze was eager to show off to him.

"Look at this." Shen Jiaze picked up a coin-sized device and said, "This is a signal transmitter, which is very small in size and weight, and may be embedded in the pet's collar." The battery is built-in, and it can be used for more than half a month on a single charge. Look at this again......"

As he spoke, he picked up a smaller device with a small connector like the charging port of the mobile phone, and said: "This is the receiver, which can be plugged into the mobile phone and then start an APP ......"

As he spoke, he took out his mobile phone and demonstrated to Li Yu: "On this app, the direction and distance of your pet will be displayed, and you can easily find your pet by following the direction indicated by the app." ”

"It's kind of interesting." Li Yu smiled. Regarding the idea of pet trackers, Shen Jiaze has long talked to him. In fact, this thing can be used not only to track pets, but also to the elderly and children to prevent them from accidentally getting lost. There are similar electronic products on the market, but Shen Jiaze's design has its own uniqueness, and once successful, it should be able to have a large market.

"Come on, come on, let's do it for a while." Shen Jiaze said with great interest, "In this way, you hide the transmitter in a place and see how I find it for you." Remember, hide it tightly, the more hidden the better. ”

Without waiting for Li Yu to say anything, Shen Jiaze stuffed the launcher into Li Yu's hand, then sat down by himself, and covered his eyes with his hands childishly to show that he would not peek.

Li Yu thought it was funny, but seeing that Shen Jiaze was so excited, he didn't want to hit him, so he took the transmitter out of the real yàn room, went to the administrative office area to find a drawer and hid it in, and then walked back to the door of the real yàn room and said, "Hide it, you can find it." ”

"Look, I'll be able to find it in two minutes."

Shen Jiaze took the mobile phone plugged into the receiver, jumped out of the real room, and said confidently.

"Look, let's set the search frequency first...... Let's say you have 10 pet dogs, each with a transmitter at a different frequency. With my app, you can only connect one receiver, through the guò scanning frequency method, find different transmitter ......, the transmitter I just asked you to hide, the frequency is 2725, we start to scan upwards from the frequency 2000, you see...... No, no, there is! Huh......"

Shen Jiaze, who was playing tricks on Li Yu, suddenly widened his eyes, and the scan line did not point to the position of 2725 as he expected, but stopped at the position of 2560, and then flashed red and green lights alternately. He took two steps forward in the direction shown on the screen, and found that the pointer was pointing to the schoolbag that Li Yu had thrown on the table.

"Did you hide the transmitter in your bag?" Shen Jiaze asked.

Li Yu smiled and said, "Brother Shen, are you timid?" I didn't even put the transmitter in my bag, I couldn't even get the right direction. ”

"It can't be!" Shen Jiaze said stubbornly, in other things, he seemed quite modest, even a little weak, but when it came to the evaluation of his skills, he could not tolerate the contempt of others.

"You must have hidden the transmitter in your bag, and the strangest thing is, how could you change the frequency of the transmitter? Could it be that I accidentally made a mistake? Shen Jiaze said.

Li Yu shrugged his shoulders, opened his schoolbag, shook all the contents on the table, and said, "If you don't believe it, check it yourself, and see if I hid the transmitter." ”

Shen Jiaze shook his phone, then shook his head and said, "No, it's in your bag, not in this pile of books." ”

"School bag?" Li Yu was a little helpless, of course he knew that he didn't hide the transmitter in his schoolbag, it must be something wrong with Shen Jiaze's equipment. But Shen Jiaze didn't believe it, he didn't have a rut, he picked up his schoolbag, shook it, and said: "There is nothing in the schoolbag, don't believe it......"

Before he could finish his sentence, he heard a click, and a small gadget fell out of his bag, slammed on the table, and bounced to the ground. Shen Jiaze squatted down and picked up the thing, only to see the red light flashing on the app interface of the mobile phone, indicating that the signal source was in his hand.

"USB flash drive? How did the source end up here? Shen Jiaze was surprised.

"What signal source? You say this USB flash drive is a signal source? Li Yu also recognized it, it was the USB flash drive that Zhou Zijun gave him, he threw it into his schoolbag casually, and he almost forgot it.

Shen Jiaze didn't answer, rushed into the real room with a USB flash drive, unscrewed a device, and began to measure the signal emitted by the USB flash drive. Li Yu didn't know what to do, so he followed.

"Li Yu, where did this come from?"

Shen Jiaze asked Li Yu with a solemn expression.

"Picked it up." Li Yu said, "I didn't pick it up, but one of my classmates found it in her schoolbag, and after asking many people who didn't know where it came from, she gave it to me." ”

"There's a tracker in there! It is the same principle as the tracker I designed, but the power is several times greater, and the tracking distance can reach at least 3 kilometers or more. Shen Jiaze said in a low voice.

"Tracker!" Li Yu was stunned for a moment, as alert as he was, how could he not think of the vision when he got out of the car just now. He asked, "Brother Shen, are you saying that someone can use this USB flash drive to track me?" ”

"When did you get it?" Shen Jiaze asked.

"It's tonight." Li Yu said.

"So, did you feel like you're being followed?" Shen Jiaze asked again.

Li Yu nodded heavily and said, "You're right, when I got out of the car just now, I found that someone was following me, but I didn't expect that they were brought by this thing...... However, this thing was obviously given to me by my classmate, so why did she follow me? "Mobile phone users, please visit wènhttp://mnet

http://mnet