In fact, what Duan Yun didn't know was that as early as May 1978, Sony, which led the trend of small stereo recorders at that time, TC-D5 had already been launched.

However, at that time, this kind of Sony small stereo recorder was said to be small, but from today's point of view, this TC-D5 recorder is still a long distance from the real mini, thick and heavy like a textbook, it is impossible to put it in a pocket, it can only be placed in a bag or handbag, but it is more convenient to carry than a general tape recorder.

It wasn't until July 1979 that Sony launched the true Walkman, which was the famous TPS-L2 at the time.

The Walkman is small enough to fit in a pocket, weighs only 330 grams, and comes with stereo circuitry and stereo headphones.

At that time, there was no large-scale introduction of this kind of Japanese Walkman in China, the main reason is that this kind of Sony Walkman is very expensive, often thousands of dollars, ordinary people can't afford it, and factories and institutions are not interested in this kind of tape recorder with only portable advantages, so until 83 years, only some coastal cities and Guangzhou and Shenzhen adjacent to Hong Kong, there is a small amount of Sony Walkman introduced.

In this era of lack of entertainment, listening to songs and watching TV has almost become Duan Yun's rare entertainment, if there is a Walkman with him, he can relax himself at any time, and Cheng Qingyan has a Walkman, it will be more convenient to learn foreign languages, and you can also listen to songs and relax anytime and anywhere.

Since Duan Yun and Cheng Qingyan established their relationship, he has been teaching Qingyan foreign languages very seriously, because in Duan Yun's future plan, after the two get married in the future, Cheng Qingyan, who becomes his wife, will definitely run a business with him, so Duan Yun is also deliberately cultivating her ability to be independent.

Buying thousands of yuan of things, just to please his girlfriend, is unimaginable in this era, but for Duan Yun, who has a net worth of more than 200,000, he can arbitrarily buy some luxury goods of this era.

"You can have a few dollars for the song tape, I'll buy you a pack back when I go back, so that you can listen to it enough, you don't have to give me the tape money, you have to let me pay you back, don't you?" Gao Lei said with a smile.

"Okay, then I'll wait for you to come back. Duan Yun nodded.

"Drink two cups at my place at noon, I'll fry two dishes, call Cui Lin and them over, my store has opened during this time, and they have also helped a lot, they are all brothers, I know you are very busy, but if you are just working every day, what else can you mean?" Gao Lei said to Duan Yun.

"That's right, I haven't seen your cooking yet, so you're going to have to show your hand today. Duan Yun said with a smile.

Duan Yun now has a lot of work in the factory, so he rarely participates in socializing, but for Gao Lei, this is Duan Yun has something to ask him, and Duan Yun also wants to train Gao Lei as a help for himself in the future, so it is still necessary to drink and cultivate feelings.

At noon, Gao Lei fried a table of dishes in the backyard of the store, and now Gao Lei has changed a lot in his personality half a year ago, he used to be drunk today, the salary paid by the factory, or after the cooked meat stall made money, he went to the restaurant every day and spent it lavishly, but now he also knows that he has saved money, and he rarely goes to the restaurant, it is estimated that it is because he has lost the iron rice bowl in the factory, he must consider his own future.

At present, Gao Lei's parents also live in the courtyard of this street-facing store, Gao Lei is only responsible for the purchase, and his parents are responsible for selling the goods, and his life is becoming richer and richer.

The atmosphere of the lunch meal was very lively, but Duan Yun didn't drink much, because he had to go to work in the afternoon, and he had to keep a clear head.

At present, the new equipment has been in the factory for nearly half a month, Duan Yun's carburizing furnace has not been transformed, mainly because the design of the digital control circuit board is more complex, the logic circuit designed by Duan Yun has been modified several times, and some additional functions have been added, after the circuit control board is changed, the relevant linkage equipment also needs to be redesigned, so the progress is slightly slower.

In addition, Duan Yun also redesigned the shell of the imitation Lada car gearbox to make the internal oil volume visible through the window, and also made some fine-tuning in the internal gears, so that the gears of the transmission can reduce friction, high temperature and noise as much as possible under frequent operation.

Although it is a mature product imitating foreign countries, Duan Yun understands that if his products want to attract the attention of the country, they must have their own originality.

In the 80s, China and foreign countries were in a period of backwardness in all aspects, whether it was economy, culture, sports, science and technology, or other aspects, there was a big gap with developed countries such as Europe, the United States and Japan.

However, in order to improve the happiness and pride of the people, we will give priority to reporting on top people and things in various industries, especially those that have a positive impact on the world.

It's just that there weren't many people and things that could be internationally shown off and made the Chinese people proud in that era.

For example, the Chinese women's volleyball team in the 80s, Nie Weiping, who won three consecutive Sino-Japanese Go Tournament championships, Hua Luogeng, who cracked Goldbach's conjecture, etc., these characters can arouse the national pride of the Chinese people without exception, so the media will give priority to concentrated reporting, so that they have finally become a symbol of the times.

And when you become the top person in the industry that the country focuses on, the influence and resources you gain will be very huge, and this will help you achieve the next higher goals.

The same is true in terms of technology, if you can make a product that is internationally leading, it will definitely attract the attention of the country's top management, and the state will definitely focus on supporting you.

In fact, it is not easy to imitate foreign mature and advanced products for the current domestic enterprises, and it can even be said that it is not easy, but the Chinese people generally love face, and this kind of thing is disgraceful in the eyes of many Chinese people, and if Duan Yun can further transform this product and make it labeled as authentic "Made in China", the meaning will become completely different.

Duan Yun is well aware of the truth, so this time the factory launched a new product, not just copy the original product design, there must be an original part that can be used.

At present, Duan Yun has completed the modification and setting of the new product, the shape and the previous Lada car gearbox have changed greatly, and the internal gear, it has also integrated some technologies of other manufacturers of Russian gearbox to integrate and improve, and the change is very ingenious, from the drawings, and any Russian gearbox is different.

In addition, Duan Yun also plans to give a more patriotic-sounding name to the newly produced gearbox in his factory, and Duan Yun plans to name him "Longteng" gearbox, which means that he is the descendant of the dragon and takes off for nine days......

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