The unparalleled talent of the country started from Harbin Institute of Technology

Chapter 160: Encryption Algorithm Breakdown; Pricing Issues

The Distributed Computer Project Group Office is located on the fifth floor of the Teaching Building of the Department of Computational Mathematics at Harbin Institute of Technology.

In mid-to-early April, the weather in the ice city was still a bit cold, with the outdoor temperature ranging from -7 degrees Celsius to +8 degrees Celsius. Wang Duoyu still wore three layers of thick clothes every day, otherwise he would not be able to withstand the cold weather outside.

"Dachun, I've told you many times that when you edit programs, don't be so rigid. You need to be flexible."

In the office, after Wang Duoyu checked the program edited by Yang Dachun, he frowned and criticized him.

He didn't want to criticize the other person like this, but he couldn't help it.

It has been more than five months since the distributed computer project was launched in November last year. Although all the project funds were in place in January this year, the project's progress is indeed not satisfactory.

If it weren't for the fact that there was really no way to recruit more talents and the budget was insufficient, Wang Duoyu would definitely continue to expand enrollment.

Besides, summer is coming soon and he has to go to the United States to give a report, so he hopes to complete this project before going to the United States.

Pity!
dong dong!

Just at this moment, someone knocked on the office door.

It was Han Jue, the office director, who came to inform Wang Duoyu to go to the principal's office.

"Director Han, is there something wrong? If the principal wants to see me, he can just call me directly. Why bother you to come all the way here?"

Wang Duoyu felt very strange, but Han Jue didn't say anything.

After arriving at the principal's office, Wang Duoyu saw Director Lei Daqing and Director Qiu Qicheng in the room, and his heart suddenly realized.

That's it!

These two are key figures in the 749th Bureau. They both came here, so I'm afraid they are really in big trouble.

Seeing Wang Duoyu come in, Liu Deben stood up and said:
"Professor Wang, you also know Director Lei and Director Qiu. They want to talk to you. You can talk here. I'll be leaving first."

Maybe it involved something very confidential, so Liu Deben had to leave the office.

"Excuse me, Principal Liu!"

Lei Daqing stood up and said something polite. After Liu Deben left, he looked at Wang Duoyu and said:
"Professor Wang, we're sorry to bother you again. Director Qiu, please talk to Professor Wang."

Qiu Qicheng nodded immediately and then started talking to Wang Duoyu.

Their purpose of coming to Wang Duoyu this time was very simple: to seek help!

Yes, it is a great shame that so many people in the 749th Bureau were unable to solve the password.

But the matter was urgent, so we had to come to Harbin Institute of Technology for help.

The reason was very simple. After the 749th Bureau came to Harbin Institute of Technology to ask Wang Duoyu for help in solving the previous code, the enemy created a new code in just a few months. This new method of transmitting coded intelligence made it impossible for Qiu Qicheng and others to crack it.

If we cannot crack it in a short period of time, the losses to our country will be very serious.

Wang Duoyu didn’t ask what was going on behind the scenes, he just wanted to know what the problem was?
To be precise, he wanted to know what the problem was with those passwords?
"do not know!"

Qiu Qicheng said something that made Wang Duoyu's eyes widen and he asked in a lost voice:

"do not know?"

What kind of international joke are you kidding?
If he doesn't know what the specific problem is, how can he help the other party?
After all, when it comes to password issues, Wang Duoyu knows nothing about it.

It cannot be said that he knows nothing about it. It can only be said that he is not very interested in radio code settings, so he has not studied the theories in this area.

Hearing Wang Duoyu's question, Qiu Qicheng smiled bitterly and said quickly:

"It's not that I don't know, but I don't know what kind of mathematical problem this is. Before we came to you, we had already visited the Institute of Mathematics of the Chinese Academy of Sciences, but they..."

"So I came here to find you, to see if you can help me."

Wang Duoyu nodded when he heard this and said:

"Okay, then tell me the questions you've translated from the relevant radio signals, and I'll see if I can find any flaws."

In the following time, Wang Duoyu listened to Qiu Qicheng's introduction and gained a deeper understanding of cryptographic technology.

During World War I and World War II, many countries around the world established code-breaking agencies, and our country was no exception. Bureau 749 was established during that era.

In the past, they were all mechanical codes, which were relatively easy to decipher.

But since the 1960s, the development of computer communication technology, information security and protection have provided a very broad space for the application of cryptographic technology.

It has been developed for nearly twenty years now, and the promotion of computer technology has made the cryptographic technology of foreigners more powerful.

After listening to this, Wang Duoyu felt a little numb on his scalp.

What he could be sure of was that this was definitely not the era of hacker technology. After all, the 749th Bureau had no connection to the Internet at all. Even their unit did not have a local area network, let alone other things.
This should be the wild age of computers, not the wild age of the Internet, so there are no hackers.

There are no Internet users in our country, but the United States already has the first batch of Internet users.

Therefore, what Wang Duoyu can be sure of now is that the password transmission this time is most likely a very early computer encryption algorithm.

However, if Wang Duoyu wants to solve this problem clearly, he must first break the shell of the so-called encryption algorithm.

He had no way of finding the so-called key holder, and of course he couldn't open the so-called shell.

But there are traces of everything, and as long as you analyze carefully, you can always find the flaws.

It is impossible for Wang Duoyu to imagine it out of thin air, so he needs to look up more information.

There is definitely no way to find out at Harbin Institute of Technology, so the only option is to go to the 749th Bureau to look through the top-secret archival materials.

However, Wang Duoyu did not want to go to the 749th Bureau because he was afraid that if he went there, the secret would be leaked and something could easily go wrong.

But he couldn't let Qiu Qicheng and Lei Daqing see it, so he frowned and looked at the 'title' written by Qiu Qicheng. It wasn't a title, but a translated radio text.

The original signal, original text and translation of this translation are all on this piece of paper.

It looks ordinary, just twelve sets of data. No matter how hard you try, it’s impossible to figure out what this thing is, right?

"More than ten years ago, I solved the black code that had troubled us for many years. The one you cracked some time ago is called the 'New Code'."

"I don't know how many more codes our enemies will create, but this time, the 'Rainbow Code' made me feel the same helplessness I felt when I tried to crack the Black Code."

Listening to Qiu Qicheng's words, Wang Duoyu nodded thoughtfully.

After the other party had finished speaking, Wang Duoyu suddenly said:

"Could you please write down the compilation problems for the previous Black Code and other codes?"

"no problem!"

Qiu Qicheng agreed without hesitation. It was a very simple thing for him.

Lei Daqing, who was listening on the side, said nothing. He just listened. If there was someone eavesdropping around their office at this time, he would definitely know.

Bureau 749 has its own signal jammer. All signals transmitted near the office have been cut off and cannot be transmitted at this time.

Moreover, before Wang Duoyu came in, Lei Daqing had arranged for people to conduct a comprehensive and thorough inspection of Liu Deben's office to ensure that there were no eavesdropping devices in the office.

Although this may seem a bit of an exaggeration, it is a necessary procedure.

Lei Daqing looked at Wang Duoyu and always felt that the latter seemed to be hiding something, but he couldn't say it.

After Wang Duoyu finished reading the questions written by Qiu Qicheng, he began to fall into deep thought.

From the black secret technology questions written by the other party, to the earlier cryptographic technology, or other innovative secret technologies in the past few years, there seems to be no pattern at all, but Wang Duoyu thought about it and soon found a little pattern.

The mechanical secrets of the past have undergone great innovations, but they are all just mathematical problems, from geometry to topology to differential equations. They seem complicated, but are actually very simple.

The so-called "new code" that Wang Duoyu and his team cracked last time was actually an encryption algorithm.

But that 'new code' had been cracked by Qiu Qicheng and his team for some time, and with the efforts of the intelligence personnel, the outer shell had been pried open, so it became very simple.

The 'Rainbow Cipher' we encountered this time uses encryption algorithms to add several layers to the cipher itself, and then adds a shell on the outermost layer.

Qiu Qicheng and his team have not yet cracked the shell, so naturally they have no way to decipher the encryption algorithm inside.

Well, since we can't follow the steps, let's decipher it from these twelve sets of data.

"Director Qiu, Director Lei, I'm going to do the calculations first. Please don't disturb me."

After talking to Lei Daqing and the others, Wang Duoyu picked up the paper and pen beside him and started calculating.

No matter what code it is, once the information is transmitted, it must be deciphered.

Wang Duoyu was able to confirm that it was an encryption algorithm, but the use of twelve sets of data to transmit them in an unordered manner was itself a huge flaw. Breaking through this shell did not require a complicated procedure, perhaps just a gentle push would be enough.

If you have the secret key, it is indeed very simple, but if you don't have it, it is extremely difficult.

This is where Qiu Qicheng and others feel embarrassed.

If possible, they would have already opened the door and obtained the so-called secret key, so that they could start cracking the encryption algorithm.

For Wang Duoyu, it is not easy to open this door.

So from the moment he arrived at the principal's office, his brain had been working non-stop.

Even if he had the brain of a supercomputer, it would be tiring to use his brain for such a long time.

As soon as noon arrived, Lei Daqing couldn't help but give Qiu Qicheng a look, but the latter didn't receive the message at all because he was also calculating.

Lei Daqing didn't understand what Wang Duoyu was doing, but Qiu Qicheng could roughly keep up, so he wanted to do something within his ability.

It can also be seen from here that although Qiu Qicheng is a talented person in the 749th Bureau and has strong mathematical talent, his era has passed.

Today's era belongs to the young people.

"Hey, Professor Wang, it's already noon. Why don't you eat first?"

"."

The office was silent. Neither Wang Duoyu nor Qiu Qicheng paid any attention to Lei Daqing, which made the latter a little embarrassed and he couldn't help but raise his voice.

In fact, the office was very quiet. Apart from the sounds made by Wang Duoyu and Qiu Qicheng during their calculations, there was also the sound of Lei Daqing's breathing and talking.

oh oh!

Qiu Qicheng said "oh", but Wang Duoyu didn't even say "oh".

Seeing this scene, Lei Daqing could only stand up and ask the people outside to help bring lunch.

At three o'clock in the afternoon, there were more than ten pages of paper in front of Wang Duoyu, which were all drafts of calculations.

Lei Daqing didn't move until more than ten minutes later, when Wang Duoyu suddenly put down his pen and laughed with relief.

"Professor Wang, is there any result?" Lei Daqing couldn't help but ask in surprise, and Qiu Qicheng also cast a curious look.

"Well, the shell has been broken. Turtle shells are really hard to deal with, but they would never have thought I could calculate it."

Wang Duoyu had a hard time. It took him a lot of time to break the outer shell. Then he needed to crack the encryption algorithm. Who knows how many layers there were? So the next step was to peel it off layer by layer like peeling an onion.

"Director Qiu, this level of encryption algorithm has a total of 23,000 numbers that need to be verified. I'll verify 20,000 of them, and you'll verify the remaining 3,000. Is that okay?"

"no problem!"

Qiu Qicheng agreed very readily, but an hour later, Wang Duoyu had already solved the 20,000 numbers and found the answer.

So a new layer of calculation begins.

As we all know, there are about seven common encryption algorithms, including encryption, decryption, symmetric encryption, asymmetric encryption, and signature encryption algorithms.

What Wang Duoyu didn't expect was that the innermost encryption algorithm was actually a hash function.

A hash function is a function that maps the key value of an element in a hash table to the storage location of the element.

This is an area he is very familiar with. After all, the distributed computer project he is currently leading requires the use of distributed hash tables.

So, after deciphering this, Wang Duoyu cracked the first level in almost ten minutes, and the progress was very fast.

Qiu Qicheng, who was helping on the side, had a look of surprise and admiration in his eyes.

He is also an old mathematics enthusiast. If he had not joined the 749th Bureau when he was young, he would most likely be a university mathematics professor now.

He devoted his entire life to Bureau 749, often repeatedly deciphering codes.

From the original mechanical cipher to the current encryption algorithm, although the essence remains the same, the dazzling encryption procedures and new functions still make him exhausted.

However, Wang Duoyu, this unbelievably young latecomer, unexpectedly has such a fast reaction speed and computing power that is comparable to a supercomputer.

In fact, Qiu Qicheng had already experienced Wang Duoyu's computing ability last time, but he never expected that he would be shocked again this time.

Another half an hour passed, and the last layer had been calculated by Wang Duoyu.

At this time, the sun was already setting outside.

"I figured it out, I finally figured it out, haha!"

Wang Duoyu handed the manuscript in his hand to Qiu Qicheng, who was very excited.

Lei Daqing stood up in surprise.

Soon, Qiu Qicheng translated the data calculated by Wang Duoyu into text, but he was still a little confused.

Because Qiu Qicheng only had partial information, Lei Daqing came over to take a look and almost blurted out what he was thinking.

"Director Lei, just keep this to yourself. Don't tell anyone. And if you don't take this information away, I'll destroy it all. I don't want to be famous!"

Hearing Wang Duoyu's cautious words, Lei Daqing's mouth twitched and he almost came over to beat him up.

However, after Wang Duoyu finished speaking, he stood up and left.

Outside the door, Li Rui, Liu Deben and Han Jue were all there, which surprised Wang Duoyu very much.

It’s already this late, and they are still waiting here?

"Secretary Li, is there something wrong?"

"Have you figured it out?"

Li Rui and others had already stood up, looking at Wang Duoyu in surprise.

"No, I just want to go back and rest."

Wang Duoyu lied, and Lei Daqing and Qiu Qicheng, who had just walked out, instantly changed their expressions from smiling to expressionless.

They seemed to understand what Wang Duoyu meant. This matter still needed to be kept secret. After all, the more people knew about it, the easier it would be for the secret to be leaked.

Although Li Rui and the others can definitely help keep it secret, what if?
People from the 749th Bureau came to Harbin Institute of Technology secretly and left quietly. Today seemed to be a very peaceful day, but outsiders had no idea how dangerous it was.

For Wang Duoyu, the matter ends here and he won’t think too much about it.

The next morning, after a good rest, Wang Duoyu came to the fifth floor of the teaching building of the Department of Computational Mathematics to continue his daily work.

Yesterday's encryption algorithm made Wang Duoyu realize that he could no longer be so "hidden".

Distributed computers are not some sophisticated computing method or technology, and they should be ended sooner rather than later.

As for other papers and the like, there’s no rush!
Soon, after Wang Duoyu stepped up his game, the distributed computer project progressed at a rapid pace. But less than two days later, in mid-April, Diao Pai Electric Bicycle Company received news: the initial version of the electronic control system had been successfully developed.

In other words, the three major components of electric bicycles have been taken care of, and we can start testing electric bicycles.

The motor, electronic control system and battery are the most important parts of an electric bicycle, and the others are secondary.

As for the design and structure of the electric bicycle itself, Wang Duoyu had already discussed it with a mechanical expert with strong artistic background and designed the general framework.

Just wait until the electronic control system is developed and tested, and then install the motor, battery, etc., and then an electric bicycle will be assembled.

For Wang Duoyu, the emergence of electric bicycles is the biggest change that has happened to the world since his rebirth.

Professor Lao Yuanchang was attracted to the teaching building of the Department of Mechanical Engineering.

In fact, as an expert in mechanical engineering and materials science, Professor Lao Yuanchang helped develop some of the battery materials. Without his help, it would not have been completed so quickly.

Not only Secretary Li Rui and others came to the laboratory, but also Zhang Jichuan, Fan Baojiang, Xin Zhouping and others were there, and even Wu Congyin, Liu Taoshun and others came to join in the fun.

The two sisters Wang Meili and Wang Meihe were actually doing odd jobs in the laboratory. When Wang Duoyu saw them, he looked at them curiously.

After all, they don't work on the assembly line, so why are they coming here?
This is a laboratory, not some other place.

Moreover, at the beginning of the month, Diao Pai Company received orders for more than 20,000 batteries. The Phase II factory must be extremely busy. How could they have time to come here?

But now is not the time to worry about these things. Wang Duoyu withdrew his gaze and came to Zhang Jichuan and others.

Everyone is here and the test officially begins.

The initial version of the electronic control system has been installed on the electric bicycle and various tests have now begun.

The bike started up fine and had no problems with the initial speed, perfectly matching the speed designed for the project.

It will be on the road soon and all the data seems to be fine so far.

Wang Duoyu looked for a while, then came to the two sisters and asked, "Why are you here today?"

"It was arranged by the leader, so we came here."

"Then what are you doing here?"

"Help with odd jobs, move tables and chairs, clean up, etc."

Hearing this, Wang Duoyu nodded silently.

I guess the management of the Phase II factory wanted to please Wang Duoyu, so this happened.

Moreover, if the sisters Wang Meili and Wang Meihe want to be promoted, they must have outstanding achievements to show for themselves, otherwise they will not be able to convince others.

After figuring it out, Wang Duoyu didn't ask any more questions.

Wang Duoyu can turn a blind eye to things within the rules.

But if this causes any problems in the factory, Wang Duoyu will definitely not give up.

There are many ways for the other party to please him, and in this situation, if he does not warn the other party, he is afraid that the other party will become more and more unscrupulous.

In the future, the other party may not make any demands, but may ask Wang Meili and her two sisters to come to him to plead for mercy.

Therefore, a warning is necessary.

However, Wang Duoyu still needs to think about how to strike this scale.

Soon, the electric bicycle came back.

There was thunderous applause at the scene, and Li Rui, Liu Deben and others all had happy smiles on their faces.

From now on, this electric bicycle is a success.

Of course, it will definitely need to undergo more rigorous road tests and other quality inspections in the future, and only after passing them can it be officially put on the shelves for sale.

Everyone quickly moved to the meeting room next door, and Wang Meili and her two sisters actually came in to serve tea and water.

Wang Duoyu didn't say anything.

The meeting is about to begin, and irrelevant personnel must of course leave the meeting room to avoid information leakage.

At the beginning, Liu Deben first affirmed the efforts of Zhang Jichuan and others, and then asked Zhang Jichuan, Fan Baojiang and others to give a detailed report.

The initial version of the electric bicycle is equipped with two 12V mAh batteries, with a total battery weight of up to kilograms. When fully charged, such an electric bicycle can theoretically travel kilometers.

But these are just theoretical data. If a girl weighing 80 or 90 kilograms rides, she may be able to reach a theoretical distance of 48 kilometers.

But what if it’s a big guy weighing two hundred pounds?
Or in rural areas, farmers definitely like to carry heavy loads, so when they use these electric bicycles, they will definitely use them to carry cargo.

Therefore, the theoretical 48 kilometers cannot be completely confirmed.

In addition, there is a 12V 10mAh battery, so when it is fully charged, the range is not 24 kilometers, but 22 kilometers.

Depending on the battery type, the price of each electric bicycle will be different.

It can also be 12V 20mA, or other different specifications, then the weight of the lead-acid battery will be different.

Depending on the specifications, the cost of the battery is around RMB 50.

The cost of the motor is around 39 RMB, plus the cost of the electronic control system and other parts of the bicycle. Adding everything together, an electric bicycle equipped with two 12V 10mAh batteries, a helmet, a small cargo basket in front, etc., costs around 220 RMB.

Considering that the price of a battery is RMB 130, the price of an electric bicycle cannot be simply and crudely priced at RMB 300.

In the conference room, after the cost was determined and everyone started discussing the selling price, the entire conference room instantly turned into a vegetable market.

In the view of Fan Baojiang, Zhang Jichuan and others, since the cost is low, the selling price should not be too high. It is best to be around 300 yuan, and the maximum should not exceed 500 yuan.

Otherwise, how could ordinary people afford it?

After all, electric bicycles cannot be too expensive, otherwise no one will buy them. So what is the point of developing such an electric bicycle?
However, the other side, led by school leaders such as Liu Deben and Han Jue, believed that the unit price of batteries was already so high that it was impossible for electric bicycles to be priced so low.

Therefore, the selling price should be more than 500 yuan.

After all, the cost of two batteries is one hundred yuan, but the price of a single battery has reached two hundred and sixty yuan. The cost of the motor is thirty-nine yuan, but the selling price is also one hundred and fifty yuan.

The independent selling price of the battery and motor alone is already 410 yuan. Add the electronic control system, the small cargo basket in the front, the helmet, etc., and the selling price is more than 500 yuan, which is very reasonable.

The two sides were arguing with each other, but Wang Duoyu remained calm and did not make any comments, just watching them quarrel.

After a while, when their arguments had quieted down a bit, Wang Duoyu suddenly spoke:

"Everyone, everyone, please be quiet for a moment. Would you like to listen to me?"

Soon, the conference room became quiet and everyone looked at him.

Li Rui didn't say anything either. In fact, Liu Deben also stopped talking after expressing his opinion.

It was just that Han Jue and Fan Baojiang quarreled the loudest.

"This is a conference room, not a market. Loud voices don't mean they're right, and soft voices don't mean they're wrong."

Wang Duoyu looked at everyone and shook his head:

"Everyone's time is very valuable, so I won't waste your time. So I have a suggestion: there should be several electric bicycles with different specifications and different ranges."

"For example, a scooter with a short range, usually around 30 kilometers, has a small payload capacity and is designed for a single rider. It can't carry more than 50 kilograms of cargo, so the price can be lower, such as 300 yuan."

"Our target customer group should be more precise. This type of electric bicycle is very suitable for customers who commute to get off work and buy groceries. They don't need to ride very far, and a commuting range of about ten kilometers is enough."

"The second type is a medium-sized electric bicycle with a range of about 48 kilometers. This type of bicycle can carry about 150 kilograms, which is enough for a 20-kilometer commute."

"Then the price of this electric bicycle can be a little higher, so let's set it at 550 RMB."

"Many people's needs are not fixed. Even if it's 550 yuan, we can still make money."

"There could even be a third model, a large electric bicycle with a range of 80 to 90 kilometers. The battery for this can't be 12V, but must be 48V, 20mAh. The motor power must also be increased."

"Of course, there may not be many such customers. In the future, we can slowly launch such large electric bicycles."

After Wang Duoyu finished speaking, everyone clapped their hands. It seemed that everyone agreed with him.

Li Rui, Liu Deben and others were all full of admiration. This plan was indeed very good and took into account people from all walks of life.

However, the small electric bicycle is priced at 300 yuan, but the cost is definitely less than 200 yuan. However, compared with a bicycle that costs 150 yuan, an electric bicycle of 300 yuan is still a bit too expensive.

"There's nothing we can do about it. Only the brave ones can enjoy it first!"

Hearing Fan Baojiang's question with a frown, Wang Duoyu replied:

"In fact, in my opinion, the sales of electric bicycles in our country will definitely not be very good, but abroad, I think they still have great advantages."

"After the large electric bicycles come out, they will definitely be very attractive to our domestic farmers."

"But small and medium-sized electric bicycles abroad are low-cost and far superior to cars, making them the preferred choice for many city dwellers."

According to Wang Duoyu's estimation, electric bicycles will definitely have a larger market in large cities and suburbs abroad.

The reason is very simple, that is the huge cost advantage!

Since the first oil crisis in 1973, the economy in Europe has begun to decline.

The skyrocketing crude oil prices are too much for many car-owning families to bear.

A car is not a commodity that maintains its value; it is an absolute consumable.

After buying a car, there will be many expenses incurred during the use of the car: insurance, fuel costs, taxes, parking fees and other expenses.

For example, in the United States, their gasoline prices are indeed cheap, but you still need to pay a certain amount of fuel tax and vehicle use tax every time you refuel.

These are fixed expenses.

On the other hand, after August 1972, the then United States announced its withdrawal from the Bretton Woods system. Starting in 1973, the Federal Reserve began printing approximately 40 billion US dollars in base currency each year to inject liquidity into the global economy.

By this year, the world's base currency of US dollars has expanded from 80 billion US dollars in 1972 to more than 350 billion US dollars today.

The rapid rise in inflation and unemployment has made many ordinary Americans miserable, and they are eager to save on household expenses.

But what about electric bicycles?

The price of such a product is only a few hundred dollars, and there is no other additional expenses except charging.

Even if it breaks down, they won’t feel bad about buying a new electric bicycle.

Upon hearing this, Liu Deben and others fell into deep thought.

Li Rui suddenly asked:
"Professor Wang, so the reason you initially proposed to build this electric bicycle project was probably because you were targeting the overseas market, right?"

Wang Duoyu nodded and said:

"Yes, that's right, I do think so, because many ordinary people in our country simply don't have such consumption capacity, and the most important point is that we don't have a good place to charge our batteries here. The power system is not very backward, and the power supply is the same."

This is an objective fact and it is difficult to change the status quo. It can only be changed through strong support from the state.

At this point in the meeting, the pricing issue of electric bicycles can basically be resolved.

However, there are still many problems that need to be solved.

For example, the medium and large electric bicycles that Wang Duoyu just mentioned have motor power technology issues, which require technical experts such as Zhang Jichuan to promote these projects.

There is also battery technology. After all, batteries of different specifications have different technical requirements, and it is definitely not that simple.

The battery used in large electric bicycles seems to have only increased from 12V to 48V, and from 10mA to 20mA, which seems to be no big difference. However, the technology involved still needs more detailed testing and research.

The internal short circuit problem is likely to come back again, and with such a heavy battery, is there a possibility of greater danger during riding?
What's more, the riding speed of a large electric bicycle is definitely not 30 kilometers per hour, but about 80 kilometers per hour, which is quite fast.

With such a fast speed, more consideration needs to be given to battery safety.

Two hours later, the meeting ended and Wang Duoyu left the meeting room.

Li Rui, Liu Deben and others surrounded Wang Duoyu and talked to him for a while. They said that the electric bicycle had been developed and production could be started after the testing was completed.

The construction of the third phase of the factory had already started in February, and it may be put into operation before May.

At this moment, what Harbin Institute of Technology wants is efficiency!
Therefore, Li Rui, Liu Deben and others have discussed with Zhang Jichuan and others to start technical training directly to train the workers first. After the third phase of the factory construction is completed and the machines are put into place and debugged, production can begin.

"Secretary, Principal, is it really necessary to be so anxious?"

Wang Duoyu listened for a while and asked curiously as he walked.

"Of course we have to hurry. We rarely have this kind of technology, so we definitely need to maximize our advantage."

After hearing Li Rui's words, Wang Duoyu suddenly came to his senses.

They are used to poverty and hardship.

Suddenly, they became wealthy and they couldn't get used to it for a while.

And the higher-ups will definitely urge us to do so. After all, foreign technology is more advanced, and everyone is afraid that battery technology, motor technology, etc. will be developed by foreigners.

So now, while foreigners have not yet mastered these technologies, we should start mass production and expand our product advantages.

Make the money first.

Although he understood, Wang Duoyu just smiled and didn't say much.

Because Wang Duoyu knew very well that even if companies in the United States, Canada, Japan and other countries had mastered motor technology and battery technology, they would not be able to produce these two products.

why?
One is the patent!
If they dare to openly produce the brushless DC motors and lead-acid batteries of Diao Pai Electric Bicycle Company, they will definitely be sanctioned.

In the future, Chinese companies will be able to directly use their foreign patented technologies.

Patents are a weapon, not to mention now, even in the future, they will protect European and American countries, not China.

If it weren't for the weapon of patents, China could easily defeat many European countries with good welfare benefits.

Why do European countries like Germany, Denmark, Switzerland, Portugal, etc. have such good welfare and more than 140 days of vacation every year?
Isn’t it because they have large, high-profit enterprises, and quite a few of them?

Take Germany as an example. This country has automobile giants like Volkswagen, and many auto parts have very high profits.

If such high-profit companies are defeated by China or foreign countries, how can ordinary people in Germany still have such high welfare benefits and up to half a year of vacation?
Patents are meant to protect these companies, so no matter which country they are from, they dare not touch them.

Diao Pai Electric Bicycle Company had applied for a patent long ago, and included thousands of design drawings of electric bicycles to apply for a patent.

The second is cost!

Many industries in European and American countries have been transferred since the 1960s and 1970s. The rise of the four Asian tigers is mainly due to the economic globalization and the transformation of the economic structure in Europe and the United States.

Coupled with the increase in the US dollar base currency and the surge in inflation, the human resource costs in European and American countries have soared to a very high level.

Last year, that is, in 1979, the average monthly salary in the United States was around 800 to 2,000 US dollars, and the average annual salary was around 10,000 to 25,000 US dollars.

However, the wages of workers at Diao Pai Electric Bicycle Company are still around 40 to 50 yuan, which means an annual salary of 500 to 600 yuan, which is not even as much as an average American worker's monthly income.

Otherwise, after arriving in the United States, Jian Xianglan would not have felt like a fish in the ocean, feeling that the air in the United States is free and the tap water is sweet.

So Wang Duoyu was sure that foreigners would not dare to do this.

PS: Please vote for me!

(End of this chapter)