Otaku Engineer in Great Tang Dynasty

Formulating units and standards for some new physical quantities is what Li Zexuan has always wanted to do. In addition to these, Li Zexuan intends to let Yanhuang Academy do the standard formulation of some new technologies.

Recalling past lives, in order to contain China’s rise, a certain superpower initiated a trade war with science and technology warfare as its vanguard. Some international societies and technical standards committees have kicked out outstanding companies in the motherland in an attempt to collapse the motherland’s high-tech industry. At that time, although Li Zexuan was angry, others were light-hearted and his ability was limited. But in this life, Li Zexuan has the ability and more status, he must promote the development of China's science and technology, and let China's scientific and technological strength stand on top of the world!

Maybe his generation cannot do it, but he can lay a solid foundation for future generations.

This is the reason why Li Zexuan can obviously eat together and wait his life, but he has to be busy and exhausted!

He not only wants to build a military power, but also a technological power! !

"Shanchang, are these ammeters and voltmeters specially used to measure current and voltage?"

After listening to Li Zexuan's third killer project, Li Tai asked suspiciously.

Li Zexuan nodded and said: "Yes! Any physical quantity must have a measurement scale and a quantitative measurement tool. If we want to develop more precise and cumbersome integrated circuits in the future, it is impossible without ammeters and voltmeters. That's it! In addition, we also need to make a meter specifically for measuring resistance! So, Green Bird, we have a heavy burden on us!"

Li Tai nodded in sympathy, and then he frowned, "But Shan Chang, how should I make an ammeter and a voltmeter?"

Li Zexuan knew that it was a bit embarrassing to let a child who had just been involved in electricity for less than a year to make ammeters and voltmeters, so he picked up a pen and drew a sketch on rice paper, and said something:

"Here, Qingque, look! We can use the principle of electromagnetic induction to make an ammeter. When there is current passing, the current passes through the magnetic field along the spring and the rotating shaft, and the current cuts the magnetic induction line, so the magnetic field force makes the coil Deflection occurs, driving the shaft and pointer to deflect.

Since the magnitude of the magnetic field force increases with the increase of the current, the magnitude of the current can be observed by the degree of deflection of the pointer. As for the voltmeter, we can get the current through the above principles, and then connect a resistor with a known resistance in series, and multiply the current by the resistor's output voltage scale! "

The ammeter Li Zexuan said is called a magnetoelectric ammeter, which is often used in modern school laboratories.

Li Tai nodded frequently as he listened to the audience. After a while, the little fat man asked, "Shanchang, where did we get this resistor of known resistance?"

This question has stumped Li Zexuan. If it is in modern times, if you ask him to get a resistor with a known resistance, wouldn't it be easy to come by? He can get as much as it needs, but this is in ancient times. Most people in this era don't even know what resistors are. Where do you ask them to get some resistors of known resistance?

After pondering for a long time, Li Zexuan finally said, “Since we don’t have a resistor with a known resistance value, we should set a standard for ourselves and let the workshop forge a steel block of one inch in length, width and height, and use it as the standard of one Euro. Resistance, to make a voltmeter! With the voltmeter and ammeter, we can measure the resistance of all devices~!"

After all, it is still a question of standards. In this era, many standards are not available, so he can only create standards, otherwise many follow-up work will not be able to continue to advance~!

Li Tai heard the words, deeply admired and said: "The mountain is long and wise!"

Li Zexuan smiled, and said: "Qing Que, you should encounter many similar problems later. You must think divergently, dare to think, and dare to do, otherwise your future achievements will never exceed being a teacher, because of your knowledge. It's all from me. You can only surpass me if you dare to forge ahead!"

This guy is painting a pie for Li Tai again. To tell the truth, even if Li Tai looks like a human being, even if Li Tai works hard, he will not be able to surpass Li Zexuan in engineering for the rest of his life. Even if there is a chance, the chance is only 0.1%. Zero zero one!

After all, this guy's head is filled with engineering knowledge that has been condensed for hundreds of years. What can Li Tai surpass?

But Li Tai definitely didn't know the inside story. The poor boy was nodding enthusiastically and said, "Tai remembers the teachings of the mountain leader!"

Li Zexuan nodded with a "happy face", and said, "Yeah! Go!"

Li Tai stood up, arched his hand towards Li Zexuan, then turned around and left with high spirits!

"Tsk tusk! No wonder the teachers in the previous life like to pour the soul chicken soup on the students so much, because it really works~!"

Li Zexuan sighed in a low voice as he watched Li Tai head up and leaving.

If Li Tai heard this, he would have to vomit blood!

...............

"Fubo, I trouble you to arrange for someone to do something for me these days~!"

After helping Li Tai solve his confusion, Li Zexuan came to Fu Bo's office and said.

"What is the young master going to do?"

Fu Bo smiled and asked. Li Zexuan took out a stack of drawings, and said with a little embarrassment: "Fu Bo, what I did this time is more complicated. You always see if there is anything you don't understand, I'll talk to you later~!"

Fubo nodded, and then the whole person's attention was immersed in the drawing.

After a while, the astonishment on Fubo's face grew stronger and stronger. After reading the last drawing, Fubo couldn't help it anymore and said, "Master, are you going to build a car?"

Li Zexuan nodded and smiled: "Fu Bo has good eyesight! Yes, I really want to build another car!"

Fubo frowned and said, "But what kind of car is this? Why does it look bigger than a carriage?"

Li Zexuan smiled and replied: "I call it an electric car. The principle is similar to that of an electric bicycle. It uses batteries and motors to drive the wheels to move quickly, but the electric car is larger and can be loaded. There are more people, and more electricity is needed!"

Fubur paused and said in doubt: "Master, this idea is good, but in this way, the car will become heavier. If more people are loaded, the car will be difficult to drive away!"

Li Zexuan shook his head and said: "This Fu Bo does not need to worry. The electric motor of this electric car is definitely different from the electric bicycle motor. It has more power and greater traction. You always arrange for someone to do it according to the drawings. ! But you must remember to keep a secret from Shaoning and Miss Mo!"

Upon hearing this, Fu Burch said, "Master, why is this?"

Li Zexuan smiled and said: "Fu Bo, this car is a wedding gift I gave to Shaoning and Ms. Mo. I plan to give them a surprise when that happens!"

What Yan Shaoning said was his good brother. Good brothers got married. This gift must not be shy, so Li Zexuan thought of it.

When Uncle Fu heard this, he suddenly realized that he nodded and said: "That's it! Master, rest assured, the old man will arrange for someone to build a car for you and keep this matter strictly confidential!"

His old faces are full of gratification. Li Zexuan and Yan Shaoning, one is his current boss, and the other is his predecessor. Fu has always had deep feelings for Yan and Li, and Li Zexuan is so concerned about Yan Shaoning’s marriage Heart, that proved that Li Zexuan really regarded Yan Shaoning as a brother. Of course, Fu Bo was relieved!

At the same time, Fubo became more concerned about the car making matters that Li Zexuan confessed. He secretly said that he must raise the spirit of twelve points, and stare at the people below to make cars!

.............................

"Ke'er, I heard today that hundreds of people flocked to Yanhuang Bank to save money. I wonder if you can come over there? Would you like Father to send you some more staff?"

In the evening, Li Ke was unexpectedly recalled to the palace by Li Er. After dinner, Li Er rarely began to care about Li Ke's daily work.

Li Ke was a little flattered. He arched his hand and said, "Thank you for your father’s concern, but at the bank, the son can handle it. At noon today, the mountain leader told the son that he should be the Yanhuang Bank. Recruiting a group of guards, after all, the money house has too much money, if there is a criminal covet it, the loss will be too great!"

Li Er nodded thoughtfully, and said, "Well! Yonganhou's arrangement is very appropriate, so let's do what he wants! Father, don't do anything extra!"

"No matter what the emperor said, you can inquire about the bank affairs personally. It is an honor for the son and the leader of the mountain!"

Li Ke quickly arched his hands.

Although this was a bit of compliment, it was also a bit sincere. After all, Li Er hadn't dealt with bank affairs much before.

"Hehe! Don't come to compliment your father, I'm tired of hearing this!"

Li Er waved his hand, said with a smile, and then asked:

"Keer, now the people flock to Yanhuang Bank and want to save money for interest. Can Yanhuang Bank be able to eat so much money? Will it pay off the interest promised to the people? It was free for the people. The exchange of Tang yuan is already a profit-giving move by the bank to withdraw for the benefit of the people. Now the bank not only does not charge the cost of keeping money for the people, but also pays interest to the people. If this happens, won't Yanhuang Bank make ends meet?

Li Ke pondered for a moment, and then said: "Father, Yanhuang Bank will never lose money! The annual interest rate for our deposits to the people is 1.75, and the annual interest rate for lending money to private merchants is 8%, and we receive one from the people. If you can lend all the money to the merchants, Yanhuang Bank will earn 6.25 money in a year with the money!

One thing that cannot be ignored is that this hundred tranches of money is not originally ours, but the people who came to save money. That is to say, our bank does not use capital at all, and the people who can rely on it in a year save one. Earning 6.25 coins from a hundred guan money, this is completely a no-cost transaction, and the profit is not low at all! Where can I find such a profitable business? How can our bank lose money? "

Modern banks have many types of operating income, including deposit and loan interest margins, handling fees, agency sales fees, investment income, etc., but the most important thing is to rely on deposit and loan interest margins, which is the foundation of the bank. In the same way, today's Yanhuang Bank, the most important way to make profits is the interest difference between deposits and loans!

Hearing this, Li Er nodded thoughtfully, and then he asked again: "What you said just now makes sense, but if there are too many people who come to save money, the merchants who come to Yanhuang Bank to borrow money are not enough to support it. With such a huge amount of money saved, for example, the people have saved 100 tans, and the bank only borrowed a consistent amount of money. Wouldn't the Yanhuang bank still lose money?"

Being able to say this proved that Li Er had done enough homework before, otherwise he would not have asked such sharp questions.

Li Ke couldn't help smiling at this time: "This father doesn't have to worry about it anymore! This policy of exchanging money without commissions and saving money to earn interest was first piloted in Lantian County, mainly because of the merchants in Lantian County. Very active, various large and small shops have sprung up in the towns of Lantian County, and the business customers in the surrounding counties are even more frequent. In this case, the business people in Lantian County have a demand for money. , Naturally much higher than other merchants!

At the end of each month, the Yanhuang Bank in Lantian County will have a money shortage problem~www.ltnovel.com~ Now it has received positive deposits from the people, and it is estimated that there will be no money shortage in the future. This is very useful for the expansion of the bank’s operations. benefit. Prior to this, the children and the bank’s staff carefully calculated that as long as the deposits absorbed by the bank’s current business volume were below 500,000, they would never lose money, or even make a lot of money! "

"Oh? Ke'er are you so confident?"

Li Er couldn't help but asked with a smile.

Li Ke replied: "Of course, father, don’t forget that although the loan interest rate of our bank is higher than the deposit interest rate, it is compared with the money that other large private households borrow and lend. The interest rate is really too low. Based on this alone, as long as the merchants are short of money, they will definitely come to our Yanhuang Bank to borrow money. So there is no need to worry about whether they will lose money!"

"Well, the annual interest rate of loans at Yanhuang Bank in Lantian County is only 8%. Compared with private loans, this interest rate is indeed low!"

With regard to civil matters, Li Er still somewhat understood, and nodded when he heard the words.

This 8% annual loan interest rate may seem scary to modern people, but for ancient people, this interest rate is simply too cheap! In this era, a monthly interest rate of 10% can be called the "conscience of the industry". With a monthly interest rate of 10%, the annual interest rate is directly in the hundreds, which is a bit too expensive!

Especially during the Sui and Tang dynasties, the imperial court set up a special fund called "Public Capital" for official loans. Its function is somewhat similar to that of modern banks. The public capital is managed by the prefectures and historians, lending 50,000 capital, and collecting 4,000 wen of interest per month, with an annual interest of about 100%.

Therefore, the borrowing interest rate of Yanhuang Bank is simply "a gift from heaven" for those businessmen!

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