country made

As the only male in the family, Song Jining is not good at everything from changing light bulbs and screws to repairing electric fans and bicycles. He is very good at helping children repair toys.

But I didn't expect that after dismantling the inside of the cardboard case, I found that it was unexpectedly complicated, with a lot of electronic components, and each line was connected regularly, unlike those that were installed casually.

"What is this?" He couldn't help asking.

"Metal detector." Ji Yu explained: "Use it to detect metal underground."

"Hehe." Song Jining obviously didn't believe it: "It's just such a circle and a few wires that can detect underground metal? Who told you?"

"Uncle on the farm." Ji Yu said: "I also tried it, it really works."

"Educated youth..." Although Song Jining hates scholars, he has to admit that some educated youths who have been sent to the countryside are very powerful and know a lot of knowledge they don't understand: "Forget it, I will just help you fix it, whether it is useful or not has nothing to do with me."

No need to look at the design drawings, Song Jining knew where to connect according to the break of the line.Ji Chen stood aside and looked up at his serious side face, and finally could vaguely see a shadow of the teacher.

To be honest, the current Song Jining is just a rustic country boy, far from a wise and mature teacher in the future, and Ji Zhuan is not so uncommon to get close to a boy with a middle school illness—if Song Jining always looks like this It looks like he likes to be close.

Song Jining quickly repaired the metal detector and handed it to Baba to see his Ji rafter: "Okay, don't break it again, these accessories are for you to dismantle the radio, be careful your dad spanks your ass."

He used to pretend to be curious and went to the maintenance department to watch the excitement because his family couldn't afford the maintenance fee for the electric fan. He then went home and repaired the electric fan by himself.After tasting the sweetness, he often went to the maintenance department and saw the maintenance master disassemble the radio, so he remembered these things.

"It's okay, I'll put it back in later." Although his house has a radio, Binjiang Town is too remote, the signal coverage can't reach here, and the radio can hardly be received, it's just a decoration.Ji Yu was sure that the family would not be able to find it in a short time, and he would wait until he found the squib, then disassemble it and put it back together.

"Whatever you want, I'll go first." Song Jining got up and wanted to leave, but Ji Yu held him back: "Brother Song, I'm not sure if it works or not? You can try it for me!"

"There's nothing to try." Song Jining didn't take it seriously, and still helped him under Ji Chen's begging.According to the method Ji Yu said, he poked the circle end of the toy gun towards a screw, pressed the switch, and the hard cardboard shell in his hand suddenly shook, followed by a sizzling sound.

Song Jining was extremely surprised: "Hey, is this really useful?"

Ji Yu nodded: "Of course."

Song Jining tried a few more times, and found that just such a long stick and a circle can really detect metal, and when it touches metal, there will be a sizzling sound, but when tested with other things, there is no sound at all, as if it is real It's a strange thing to be able to tell the difference between metal and cloth by yourself.

"Strange, how did this thing get done?"

Seeing his curiosity, Ji Yu explained in detail: "This is a capacitive three-point oscillator formed by using an inverter, peripheral inductors and capacitors, and then amplifies the signal..."

Although he is only a country boy now, Song Jining will be a very powerful military researcher in the future, Ji Yu couldn't help but want to teach him a little bit in advance.But the content of this kind of electronic principle is extremely boring. Song Jining lost interest after listening to it, and interrupted Ji Yu: "OK, OK, I understand, you can play with it!"

He stuffed the metal detector to Ji rafter and left, and Ji rafter was hit hard.Was what he said so boring that Song Jining didn't even bother to listen.

Recently, Ji Chen has a lot of free time. When he was a fool before, the family had to take him by his side all the time. Now that he has returned to normal, the family has completely freed him.A 10-year-old child will not be with his parents all the time. Ji Yu doesn’t go to school now. He reads very late, so naturally he wakes up late the next day. When he wakes up, his parents have gone to work. A few steamed buns are his breakfast, and Li Shulan will cook when he comes back from school at noon.

When Ji Yu was eating steamed buns, Ji Yong led Ji Wu to come, with an angry look on his face.He heard from Song Jining about Ji Yu being beaten, and he didn't need to guess that it was the Zhang family boy, so he came here to support his younger brother.

"Yuanyuan, don't be afraid, I'll beat that kid to vent my anger on you!"

"Thank you Brother Yong, no need, I'm not hurt..."

"That's not okay, he's already beating you." Ji Wu said angrily, "Don't worry, I'll trick him out and beat him again, I won't let his parents come to you."

Ji Yu shook his head, you hit Zhang Xin, Zhang Ermei must have known that it was related to me, why didn't she come to me.

Of course Ji Chen is not afraid, but he doesn't want them to fight.At any rate, his soul is an adult, so he wouldn't fight with a child and help him.Moreover, Ji Yong had practiced before, and Ji Wu was very strong, so it would be bad if the two of them injured Zhang Xin.In this era, there is no law on the protection of minors, Zhang Jian and the others will be arrested, and so will Ji Yong.

Seeing that Ji Yong and Ji Wu were still filled with righteous indignation, Ji Chen thought for a while, then suddenly covered his mouth and said in a low voice, "Brother Yong, Brother Xiao Wu, let me tell you a secret."

There were only three of them in this room, and he still pretended to speak in a low voice, which really attracted the attention of Ji Yong and Ji Wu: "What secret?"

Ji Wu also asked in a low voice, like an underground joint.

Ji Yu coughed and pondered for a while before he said mysteriously: "I heard that there are treasures buried by the old rich man in our town."

"Baby?" Ji Yong and Ji Wu looked surprised.

Ji Yu nodded solemnly: "My family is a landlord class. I will always know some news. I want to find those treasures. Maybe there is gold. Can you help me?"

Ji Yong and Ji Wu nodded vigorously, they were not interested in treasures, they were only interested in "finding treasures".

Of course, there is no such thing.They searched with Ji Zhuan for a day, but they didn't find any treasure, but they found some nails, iron pieces, and what really excited them was the "metal detector" that sizzled.

I don't understand the principle of what Ji Chen said, but it will sizzle when it touches metal, which is amazing.

At this time, the children had nothing to do every day except for class, and Ji Yong and Ji Wu were very popular, so when they came back the next day, there were many people behind them.

Song Jining, who was also popular, was coerced here.