country made

In the blink of an eye, more than half of the summer vacation is over, and Song Jining is more comfortable playing with Ji Rafter... Uh, there seems to be ambiguity in saying that.

In fact, Song Jining said according to the physiology book that too many minors will affect his health, but he often can't help it after he starts meat again. After all, he is physically strong and has strong desires in that regard.Considering Ji Yu's age, Song Jining basically only looks for him once or twice a week, and then it will become like this.

"Woo... Let go... Brother Song..."

In the dimly-dark room, there was the faint whimpering of Ji Rafter.

He was pressed down by Song Jining, and the most sensitive part was grasped by his big palm. Song Jining's huge thing squeezed between his legs, and he moved skillfully while holding the things of the two of them.Ji Yu had already arrived, but he pinched the roots and couldn't get out. He shook his hands and tried to pull Song Jining away, but he couldn't use any strength at all, and he was about to cry in the end.

"Brother Song... Please... let go..."

"No, it's bad for your health if you do too much, once a night is enough."

But once by himself is not enough.

Pressing Ji rafter twice before releasing him, Ji rafter was tense all night, almost fell asleep as soon as he let out, with tears in his eyelashes.Song Jining wiped Ji Yu clean with a wet towel before going to take care of himself, and couldn't help but let it go again in the bathroom.

Going back to the bedroom and seeing Ji Yu's red eyes, Song Jining reflected on himself: "Did I do too much recently?"

He didn't do it that often when he was at his own home.

But I felt it the next day, and I still only felt refreshed. The previous hot feeling disappeared, and I even felt so refreshed that I could fly. There was no weakness or aging phenomenon mentioned in the medical journal.

As for Ji Yu, Song Jining is of course also very concerned.However, Ji Zhuan himself admitted that it was very comfortable to do this. Apart from his own shame, his body was more relaxed than usual the next day after doing it.

"However, I don't think it's necessary for us to be together... For such a private matter, it's better to solve it secretly by yourself..."

"It's not comfortable enough to be alone!" Song Jining said so confidently: "And what's the secret between us? I've already seen you all. You have to be shy. I'll take off your clothes and let you see it a few more times to see how you get used to it." until."

"No, no, no, no need." Ji Zhuan retreated in defeat.

After playing with the friends, taking advantage of the time during the summer vacation, Ji Zhuan and the two went to the Army Research Institute to recommend themselves to work for free.

The director, Lan Yutian, happily accepted the two little assistants with a smile, threw a lot of miscellaneous things to them, and sat on the side with his feet crossed, making Zheng Xian's family jealous: "How can the dignified director use the public to seek personal gain, you two Come over and be my assistant, and when you graduate from the assigned unit, I will write a letter of recommendation for you."

Lan Yutian raised his chin and hummed: "Don't I know how to write a recommendation letter? The director's recommendation letter has more weight than the deputy director's!"

Although it is a chore, both of them are willing to teach Ji Yu and Song Jining some techniques that do not involve the core, so they have learned a lot.

Zheng Xian's family was surprised by their learning ability, and said privately to Lan Yutian: "If the current students have such fast comprehension ability, I will immediately apply to be a teacher."

Lan Yutian shook his head: "There are so many geniuses in the world. We are lucky to meet two at a time. I really want to recruit them now and train them slowly, but it's a pity..."

Zheng Xianjia nodded, regretfully said: "Yes, it's a pity..."

These two talented kids shouldn't be confined to a small research institute.

In the blink of an eye, the summer vacation came to an end, Ji Yu and Song Jining quit their part-time jobs at the research institute, and returned home to start their summer homework.

Yes, they have summer homework.The summer homework is all the exercises from the previous semester, copying, composition, etc., which is meaningless to Ji Yu and Song Jining, and if they want to review their homework, this is not how they review.So even Ji Zhuan couldn't help rushing homework at the end of the summer vacation preparations, just to complete a task to avoid being nagged.

The homework for the summer vacation was not difficult except that it was quite a lot. It took the two of them only three days to finish it. Naturally, their level could not be compared with that of the exam, but neither of them cared.

One week before the start of school, Li Shulan returned and brought back a gift from Ji Jianguo to Ji Yu and Song Jining: a Walkman from Fusang.

This is a Fuso brand player, which has been passed down from the port city. It uses tape playback and has no radio function.So Ji Jianguo bought them more than ten cassettes of Hong Kong singers.

The songs in these tapes have a bright rhythm and novel and melodious tunes, and you can sing along after listening to a few lines. Most of them sing about love and love.The newspapers still hold a critical attitude towards these vulgar songs, but the government no longer prohibits them. It is currently widely disseminated in southern cities, and it is estimated that it will spread to the whole country in a short time.

Li Shulan was not very satisfied with the tapes that Ji Jianguo bought. She also liked to listen to them, but she felt that children should not be allowed to listen to them.So she bought a set of English teaching tapes for each of them, also from Hong Kong, very expensive, authentic American English courses, and textbooks.

"Song tapes are only allowed to be listened to at home, and are not allowed to be taken to school. English tapes can be taken, so study hard."

That night, Ji Yu and Song Jining dismantled the tape player.

Song Jining is purely for learning. Now he wants to dismantle any electronics he sees, and then understand the principles. Unfortunately, the only things that can be dismantled by him in ordinary families are electric fans and radios. If bicycles are included, Song Jining said that he has It has been dismantled.

But after all, it was a precious gift from Uncle Ji, Song Jining took it apart very carefully to ensure that he could put it back in full after taking it apart.

Ji Yu didn't have that much curiosity, he just wanted to understand the working principle of the tape player.

In fact, he also wanted to help Ji Jianguo's company design a tape player, but he didn't understand that CD players were already popular when he was born, and tapes had already been eliminated.

After dismantling it and knowing about it, putting it back together, Ji Yu asked Song Jining: "Brother Song, let's compete and see who can draw the wiring diagram of this Walkman first."

Song Jining raised his eyebrows: "Okay, let's compare."

For the last week, both of them were buried in the room drawing pictures.Li Shulan thought they were catching up on their summer homework, so she came in to check and found that the summer homework had been completed, so she stopped interfering with them.

Ji Yu was the first to draw the circuit diagram, and Song Jining understood the principle of the tape player from the electronics, and drew the diagram according to his own understanding of electronics, and soon collapsed.Because if it is made according to the picture he drew, there will definitely be a short circuit accident on the player, which hit Song Jining, whose confidence in himself has exploded during this period, a big blow.

Ji Yu took his design drawing and explained to him in detail: "The tape player relies on the vibration of sound, which drives the magnetic drum to "draw" traces on the tape, and emits different frequencies according to the amplitude and frequency of the vibration. At that time, the magnetic drum is restored according to these traces, and it becomes the sound we hear."

Song Jining nodded: "I know, but I don't understand where I went wrong. Is there a problem with the audio output, or is there a problem with the analog-to-digital conversion?"

Ji Yu looked at it carefully, and began to write the formula on the draft, explaining to him while writing: "The audio output circuit buffers and amplifies the connected tape sound. What is needed is the IPOD interface. The tape sound is converted into a digital audio signal. How many analog-to-digital conversion circuits are needed? Your calculation method is wrong, the formula should be calculated like this..."

Song Jining knew everything, and after Ji Zhen finished explaining, he immediately revised his design drawing, and it only took more than two hours to complete the correct design drawing.

Ji Yu blinked. When Xiao Song first learned the radio, he already felt that Xiao Song learned very quickly, and now he feels that Xiao Song understands faster.

Of course, it is impossible for Ji Yu to give this design to his father. The country has promulgated the "Patent Law" this year. Although it was promulgated later, the mini radio he designed has long been imitated by countless factories. After the device spreads in, it will definitely be imitated by various electronics factories immediately.But Ji Chen dared not ask his father to challenge the newly established regulatory department with the idea of ​​"the law does not blame the public".

After understanding the design principle, Ji Rafter redesigned a new tape player and combined it with the radio circuit to achieve the function of both receiving sound and playing tape.

Although there is already a bottom line, it is not so easy to design it. At least when the school starts, Ji Lian is still in the groping stage.After hearing his idea, Song Jining expressed his willingness to support it, so when the two returned to school, the first thing they did was to continue drawing.

When the roommates saw that they were writing and drawing as soon as they came back, they thought they were busy with their summer homework, so they kindly said, "Why, haven't you two finished your summer homework yet? How much is the difference? Bring it here and we'll finish it for you. "

Ji Chen smiled and shook his head: "Thank you, we have finished writing."

Tomorrow is the day of the official report, and everyone is busy. Qin Zhanyu from the dormitory next door took Song Jining to play, and proudly showed his new summer gift, a tape player made by Fusang.

"Song Jining, I'll show you something good." When the button was pressed, cheerful songs poured out, playing a popular theme song in a TV series.

The roommates ran over to look curiously: "What is this? A new radio?"

"Tut tsk tsk tsk~~" Qin Zhanyu shook his finger: "Of course not, this is a tape player, the brand is the most famous Nisuo brand in Fusang, and it is very expensive. But it is very convenient, as long as you buy the tape, you can listen to whatever you want What, I bought dozens of tapes!"

Lending the tape player to his roommates, Qin Zhanyu walked up to Song Jining and asked, "Song Jining, Ji Yu, would you like to come to my dormitory to listen to music together? There are a few big singers in Hong Kong who sing very well!"

Song Jining and Ji Yu looked at each other, and silently took out two identical Niso brand cassette players from their schoolbags.

Qin Zhanyu: "...you still say that your home is in the countryside, you are all rich people!"

Song Jining looked serious: "It's for learning."

Then he pressed the switch, and a string of English slipped out, and in an instant, other people in the dormitory surrounded him again.

"I lent it to you, let's listen to it, just don't break it."

You can listen to songs at any time, but you can’t always listen to the English taught by foreigners. Naturally, the roommates are even more rare about Song Jining’s English tapes.Qin Zhanyu didn't care, just asked the two of them repeatedly: "Aren't you going to play with me?" He looked at the densely packed formulas in the drafts on their desk, and admired them in his heart: "It's just the beginning of school, and you have worked too hard. right?"

After school started, everyone was promoted to the second year of high school, and at the same time, the class personnel also changed.Last year, the head teacher said that the students who lag behind in grades will be replaced by outstanding students from other classes, especially the rich second-generation who spent money to come in, and a few who have no intention of studying or can't keep up have been transferred away. A few top students were transferred.

There are still a few rich second generations who stayed, and their scores have improved a lot compared to the original test. Even Qin Zhanyu worked hard under the influence of Song Jining, and he was worthy of hanging at the rear of the car.For this reason, he tried his best to invite Song Jiji to dinner: "If you were not willing to borrow me to review the materials, I would definitely be banned. Although I don't care, my dad will definitely open my ass. I must thank you very much." .”

Song Jining opened his paw holding Ji Yu: "If you want to thank me, thank me, and don't forget who gave you the lecture!"

"Of course I thank you too, but I'm afraid you eat too much." Qin Zhanyu smiled.

Laughing and laughing, the feelings between the last few friends who stayed were even deeper. They had all been helped by Ji Yu to some extent. Although they only lent the review materials, they were still willing to borrow their own review materials at the end of the semester. In the whole class, only Ji rafters, so I also pay more attention to quarter rafters.

Ji Yu and Song Jining were still busy with the research of the new Walkman in private, so Ji Yu dismantled his own mini radio and tape player, and put them together again.Although there were some small mistakes, but with the real thing, the progress was much faster. In less than half a month, Ji Yuan made a new type of Walkman with both radio and tape playback functions.

After thinking about it, I remembered that there should be a recording function. Ji Yu drew another picture and added the recording function.The recording circuit is much simpler than the playback circuit, but the sound signal is introduced from the audio output circuit, and converted into a digital signal by the buffer circuit and the amplifier circuit.

Ji rafter designed two kinds of walkmans, one with radio and tape playback functions, and one with recording function in addition to the above. As for how to produce and sell them, Ji rafter completely left it to his father.

Just when he sent the design drawings, Ji Chen also sent him the "Patent Law" at the same time.