Li Jian received a relay from the staff of Qianghua Laboratory that Qi Cuiping and the others had successfully completed the task and went to the Badaling Great Wall, and originally said that they would go together, but Li Jian knew that Qi Cuiping had been annoyed to death by Tang Yang recently, and he must have taken this opportunity to avoid Tang Yang, so he just smiled.

He Chao followed, Qi Cuiping and their group were still more than a dozen girls, as long as they didn't go to the broken wall of the city that was not open, there should be no danger, so they continued to stay in the laboratory and discussed the problem of optical drives with Jiang Sicheng and Liao Weihong, although technically, optical drives can be completely realized at this time, but because they have not carried out relevant work in this area before, their discussion is still on how to use a single component.

The optical drive uses the uneven light spot on the surface of the optical disc, and when the light emitted by the laser emitter passes by, it is reflected in different four directions, and is collected by the photocell, and after distinguishing, it can distinguish whether the number represented by the light point is 1 or 0, and then transmit the data back.

If you want to use an optical drive, you need to have a CD, and filling a CD is not a new thing, the vinyl record used in the early years of the record player, recorded the analog signal, and the laser record, the optical signal was used.

"By the way, we can buy a laser TV record player, take apart its bald head, and restore it according to our ideas."

Li Jian patted his head, and then lowered his head again,

"Laser TV record player, isn't it just an optical drive, but an optical drive used to listen to music."

At this time, he realized that he had made the same mistake as everyone else at the time, and that the optical drive was actually made in 1974 by the Dutch company Phillip and the Japanese company Nisso. And the standard of the first generation of CDs was customized, but everyone limited the role of CDs to music, and no one thought of storing computer data.

Presently. Five-inch disk has been developed for a while, and the standard three-inch disk has just begun to occupy a dominant position in the future, I see that the computer does not have an optical drive, and I intuitively think that there is no optical drive in this world, but in fact, the optical drive has appeared for a while.

Soon it was 1986, the third generation of the standard for optical discs. That is, the Green Book standards are about to be published, and the previous first generation of Red Book and second generation Yellow Book standards are already in use.

I'm working hard to get a CD-ROM drive now, even if it's successful. If you make a product, you will also be sued by Philip and Nisso, so it is better to get a patent license from Philip or Nisso, and then make subsequent improvements to the disc and optical drive. In this way, it will be better to enter the market.

"Buy a record player. Do we do imitations? Didn't you say that this optical drive is for computers, do you want to use computers to play records? ”

Liao Weihong still knows very little about computers, and he hasn't figured out the two yet, while Jiang Sicheng slapped his thigh violently,

"You kid can, the original record was stored analog data, but it was also data, and now it has developed into a CD record. The optical drive I told you is exactly the same thing, only. They didn't expect that the record player could also be linked to the computer, the floppy disk read the data, and the optical drive read the same data, so the record player could be added to the computer as an input and output terminal. ”

Li Jian nodded, with the shame on his face that he had just discovered that the optical drive had been created, and he was still thinking that he was building a satellite, and now he didn't need to look at it, he just needed to contact Nissel or Phillip.

Of course, on top of the other party's patents, the best way is to make technical modifications and changes, or even completely bypass the other party's patents, especially to completely avoid the other party's core patents and develop a new generation of optical disc drive standards.

However, Li Jian knew that on the CD-ROM drive, it was not wise for him to rashly improve the algebra of science and technology, because Qianghua was still too weak at present, compared to Philip and Nisol, he was weak and pitiful, and even people would not regard Qianghua as an opponent at the same level.

In particular, CDs are still mainly used for music storage rather than data storage, which is completely different from the era when personal computers were popularized in later generations, and the sound quality and sound effects of music are the needs of high-end people, and for most consumers, it is not very perfect to distinguish.

Of course, Niso and Phillip do not want their products to be replaced by a new generation of products launched by Qianghua, after all, if consumers know that there are more advanced products, then the high-end must be new products, and their sales are likely to be affected by this.

Just like Li Jian saw the development of AM and FM because he recalled the development experience of records, as early as after 1920, there was an amplitude modulation that is AM, a light wave method, and when FM first appeared, AM has been developed for decades and has been successfully commercialized, but the broadcasting giant RCA has come forward to squeeze FM out of the high-frequency band, and finally can only use the ultra-high frequency band, resulting in a shortened FM transmission distance and a louder noise, so that the commercial value has plummeted.

If Li Jian rashly launched more advanced optical disc and bald head technology at this time, it would definitely attract a joint attack by Philip and Nisso, and even use patent barriers to completely exclude Qianghua from optical storage technology, and Qianghua missed a great opportunity.

After a few years, Niso came to his senses and remembered that if he put the optical drive into the computer, Qianghua would have no cake to share, which was equivalent to missing a lot of opportunities to make profits from abroad.

Li Jian's current development strategy is to make use of the scientific and technological level that surpasses that of foreign countries or contemporaries as much as possible, to manufacture corresponding products, and to earn profits from foreign markets.

This has two advantages, one is that by recovering a large amount of foreign exchange, Qianghua can earn foreign exchange for the country and get the corresponding political attention, for example, this time, Zhang Zhihua and Wu Dunyi support Qianghua, most of which depends on the huge amount of foreign exchange created by Qianghua in Jianghuai Province and Jiangzhou City, they are afraid that after Qianghua is swallowed by Lu Junshan, Lu Zhicheng does not have the ability to run Qianghua well, and Jianghuai Province will lose a lot of foreign exchange.

The second is that it is relatively easier to make money in China, but no matter how much money Qianghua makes, if he wants to buy some imported materials, he needs to report to his superiors and apply for foreign exchange quotas, so that it is possible to buy the necessary imported materials, but how to exchange foreign exchange is not what Qianghua said, it is equivalent to putting the lifeblood in the hands of others, and Li Jian does not want to be controlled by others all the time.

Among the state-owned enterprises that closed down during this period, there are many leaders of state-owned enterprises who have the vision to enter the manufacturing industry or other light industries, household appliances, such as air conditioners, such as televisions, but the domestic production capacity is limited, the technical level is more limited, and some advanced products such as picture tubes, compressors and other key components must be imported from abroad, and there is no foreign exchange, so these leaders can only do it in a hurry, and finally the enterprise goes out of business.

Thinking of this, Li Jian said to Jiang Sicheng and Liao Weihong,

"Don't talk about this for now, I'm going to buy a record player and come back and see it, maybe I don't need to copy it, I have a better way, but I have to buy it back and see it first."

Jiang Sicheng and Liao Weihong naturally have no opinions, Li Jian said this, which means that he basically has a spectrum in his heart, but he just didn't say it to death.

Since it's okay here, I remembered what I told Liao Weihong and Tang Yang when I came to it, if I had time to climb the Great Wall, I proposed to Xia Sicheng and Liao Weihong.

A trip to Mount Tai made Li Jian feel back pain and leg cramps, but after coming back, the feeling of his body and brain was much better than that of staying all day before, and it seemed that the exercise was effective, so this time Qi Cuiping was going to the Great Wall, so he agreed to take everyone with him.

Liao Weihong has not been to the Great Wall yet, so he is naturally willing, but Jiang Sicheng waved his hand and refused, he still has a lot of work to do.

When he went out, Liao Weihong asked Li Jian, if he wanted to call Mr. Tang together, Li Jian waved his hand, at this time, Tang Yang probably wished he could call him, he was suffering from Tang Lao.

boasted in front of Qian Lao for a while, and used Qi Cuiping as a shield, but these words had already run from Qian Lao's mouth to Tang Lao's ears, although Tang Yang successfully saved Tang Lao from the embarrassment of being a generation shorter than Qian Lao out of thin air, but there is the responsibility of not reporting the object, and he still has to bear it.

As for Qi Cuiping, Li Jian is still in the way and can't deceive Tang Lao at all, he is waiting to see his grandson before entering the ground, and he will not coerce and lure Tang Yang at this time.

"Call a few lab classmates who are fine."

Li Jian led Comrade Lao Liao down from the fifth floor of the laboratory, and called a few people all the way, among them, Zhong Ziqiang and Wang Yang in the 105 dormitory happened to have no important things at hand, and they had never been to the Great Wall since they came to Yanjing.

In this way, the four of them can take a van taxi to Badaling, and they don't have to worry about losing some people, and they won't be able to get together when they don't have contact tools.

The men traveled, so they didn't have so much luggage, and when the four of them arrived at the foot of the Great Wall, it was not yet eleven o'clock.

"Let's climb over the mountain and come back for dinner, see who climbs the farthest, and there is a reward for the first place."

Before he finished speaking, Zhong Ziqiang scurried out like a rabbit, and Wang Yang asked Li Jian with a smile,

"What reward, I heard that you went to France and met a lot of French beauties, introduce one?"

"Phew, you can speak French, and you are introduced to how you chat with people. The reward is worth 300 yuan, so you can go quickly. ”

As soon as Wang Yang heard about the three hundred yuan, he immediately ran faster than Zhong Ziqiang, Liao Weihong looked at the footsteps of the two people enviously, and shook his head,

"Old, if I were young, I would definitely fight with them for the three hundred yuan."

"Fortunately, you are not young anymore, I mean three hundred yuan, but who is the first, there is a chance to invite me to eat three hundred yuan, I am going to call Qi Cuiping and a dozen of them to eat together, three hundred yuan should be enough."

Li Jian said with a smile that after coming back from Paris, these two dormitory classmates should have also earned some private money. (To be continued......)