Otaku Engineer in Great Tang Dynasty

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To formulate units and standards for some new physical quantities, this is what Li Zexuan has always wanted to do. In addition to these, Li Zexuan plans to let Yanhuang Academy do the standard formulation of some new technologies in the future.

Recalling the previous life, in order to contain China’s rise, a superpower launched a trade war spearheaded by the technological war. Some international societies and technical standards committees have kicked out the outstanding enterprises of the motherland in an attempt to collapse the high-tech industry of the motherland. At that time, although Li Zexuan was angry in his heart, others were soft-spoken and his abilities were limited, but in this life, Li Zexuan has the ability and status, so it is necessary for him to promote the development of Huaxia Science and Technology, and let China's scientific and technological strength stand on the top of the world!

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

This is why Li Zexuan can eat and wait for the rest of his life, but he has to be busy and exhausted!

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

"Mr. Shan, are these ammeters and voltmeters specially designed to measure current and voltage?"

After listening to Li Zexuan's third killer project, Li Tai asked with a look of surprise.

Li Zexuan nodded and said: "Yes! Any physical quantity must have a measuring scale and a quantitative measurement tool. In the future, if we want to develop more precise and cumbersome integrated circuits, it is impossible without ammeters and voltmeters. Yes! In addition, we also need to make a special instrument for measuring resistance! So Qingque, we have a heavy burden on us!"

Li Taishen nodded in agreement, and then he frowned: "But Chief, how can I make an ammeter and a voltmeter?"

Li Zexuan knew that it was a bit embarrassing for a child who had just been exposed to electricity for less than a year to make ammeters and voltmeters, so he drew a sketch on the rice paper with a pen, and said:

"Well, Qingque, look! We can use the principle of electromagnetic induction to make an ammeter. When there is current passing through, the current passes through the magnetic field along the spring and the rotating shaft, and the current cuts the magnetic field line, so the coil is affected by the magnetic field force. 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 through the deflection of the pointer. As for the voltmeter, we can obtain the current through the above principle, and then connect a resistor with a known resistance in series, and multiply the current by the resistance to obtain the scale of the voltage! "

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

Li Tai nodded frequently while listening to it. After a while, the little fat man asked, "Sir, where did we get this resistor with a known resistance value?"

This question stumped Li Zexuan. If it were in modern times, wouldn't it be easy for him to get a resistor with a known resistance? He can get as much as he wants, but this is in ancient times. Most people in this era don't even know what a resistor is. Where do you ask him to get some resistors with known resistance values?

After pondering for a long time, Li Zexuan finally said: "Since we don't have a resistor with a known resistance value, let's make a standard by ourselves, let the workshop forge a steel block with a length, width and height of one inch, and use it as a standard of one euro. Resistors, let's make a voltmeter! With a voltmeter and an ammeter, we can measure the resistance of all devices~!"

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

Li Tai heard the words and said with deep admiration: "The mountain is long and wise!"

Li Zexuan smiled and said: "Qing Que, you should encounter many similar problems in the future, you must think differently, dare to think, and dare to act, otherwise your future achievements will never exceed being a teacher, because of your knowledge. You learned everything from me, you can only surpass me if you dare to forge ahead!"

This guy is making a big cake for Li Tai again. To be honest, even if Li Tai is a natural person, no matter how hard Li Tai works, he will still be unable to surpass Li Zexuan in engineering in his life. Even if there is a chance, the chance is only 0.0%. Zero zero one!

After all, this guy's head is filled with hundreds of years of engineering knowledge, which has condensed the knowledge crystallization of more than ten generations. What does Li Tai take to surpass?

But Li Tai certainly didn't know the inside story. The poor boy nodded vigorously and said, "Tai keep in mind the teachings of the mountain chief!"

Li Zexuan nodded "with a look of relief" and said, "Yeah! Let's go~!"

Li Tai stood up, bowed his hands to Li Zexuan, then turned and left with high fighting spirit!

"Tsk tsk! No wonder the teachers in the previous life like to pour chicken soup for the souls of the students, because it really works~!"

Looking at the back of Li Tai leaving with his head held high, Li Zexuan sighed in a low voice.

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

……………………

"Uncle Fu, please arrange for someone to help me make something for 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?"

Faber got up and asked with a smile.

Li Zexuan took out a stack of blueprints, and said a little embarrassedly: "Uncle Fu, what I did this time is more complicated. You should take a look first. If there is anything you don't understand, I will tell you in detail later~!"

Fu Bo nodded, and then the whole person's attention was completely immersed in the drawings.

After a while, Fauber

The look of surprise on his face became stronger and stronger. After reading the last drawing, Uncle Fu couldn't hold back any longer and asked, "Master, are you trying to build a car?"

Li Zexuan nodded in admiration and said, "Uncle Fu has good eyesight! That's right, I really want to build another kind of car!"

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

Li Zexuan replied with a smile: "I call it an electric vehicle. The principle is similar to that of an electric bicycle. It uses a battery and a motor to drive the wheels to move forward quickly, but this electric vehicle is larger and can be loaded. There are more people and more electricity is needed!”

Forber paused and said doubtfully, "Young master's 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, "Don't worry about this Fu Bo, the electric motor of this electric car is definitely different from the electric motor of an electric bicycle. It has more power and greater traction. You can just arrange for someone to make it according to the drawing. As for the electricity-related part, you can ask Qingque or me! But you must remember to keep it a secret from Shaoning and Miss Mo!"

Hearing this, Faberge said: "Master, why is this?"

Li Zexuan smiled and said, "Uncle Fu, this car is my wedding gift for Shaoning and Miss Mo. I plan to give them a surprise when the time comes!"

Yan Shaoning is also his good brother. The good brother is married. This gift must not be shabby, so Li Zexuan thought of this.

When Uncle Fu heard it, he suddenly realized, he nodded and said: "So it is! Young master, rest assured, the old man will arrange for someone to help you build a car, and keep this matter strictly confidential!"

His old face was full of relief, Li Zexuan and Yan Shaoning, one is his current owner, the other is his former owner, Fubo has always had deep feelings for Yan and Li, Li Zexuan is so fond of Yan Shaoning's marriage Heart, that proves that Li Zexuan really regards Yan Shaoning as a brother, and Uncle Fu is of course relieved!

At the same time, Fu Bo was more and more interested in the car-building matters that Li Zexuan explained. He secretly said that he must raise the spirit of twelve points, and stare at the people below to build cars!

…………………………

"Ke'er, I heard today that countless people are flocking to Yanhuang Qianzhuang to save money. I wonder if you can still be busy over there? Would you like the royal father to send you 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 immediately, he cupped his hands and said, "Thank you for your concern, but the banker can handle it, and at noon today, the mountain chief told Erchen that he wanted to help Yanhuang Qianzhuang. Recruit a group of guards, after all, the bank has too much money, and if there are outlaws coveting it, the loss will be too great!"

Li Er nodded thoughtfully, and said, "Well! This arrangement of the Marquis of Yongan is very appropriate, so let's do it according to his wishes! The royal father will not do anything unnecessary!"

"Whatever the father said, you can personally inquire about the affairs of the bank, and the son and the mountain chief are already grateful!"

Li Ke hurriedly cupped his hands.

Although this is a bit of a compliment, it is also a bit sincere. After all, Li Er didn't care much about the bank's affairs before.

"Haha! Don't come to compliment the emperor, I'm tired of hearing this!"

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

"Ke'er, now people are flocking to Yanhuang Qianzhuang, wanting to save money to earn interest, can Yanhuang Qianzhuang eat so much money? Can the interest promised to the people be paid off at that time? It was originally free for the people. The exchange of Tang Yuan is already a profit-giving move by the Qianzhuang for the benefit of the people. Now the Qianzhuang not only does not charge the fees for keeping the money for the people, but also gives them interest. If things go on like this, won’t the Yanhuang Qianzhuang make ends meet?”

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

One thing that cannot be ignored is that this hundred pieces of money are not originally from us, but from the people who came to save the money. That is to say, our bank has no capital at all, and the people who can rely on it in a year save one. Earning 6.25 bucks from 100 bucks is a complete deal without capital, and the profit is not low at all! Where can I find such a deal? How can our money be lost? "

There are many types of operating income of modern banks, including deposit and loan interest spread, handling fees, agency sales fees, investment income, etc., but the most important thing is to rely on deposit and loan interest spread, 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 just said makes sense, but if there are too many people who come to save money, the merchants who come to Yanhuang Qianzhuang to borrow money will not be able to support it. With such a huge amount of money saved, for example, the common people have saved 100 qian, and the bank only borrowed a certain amount of money, so wouldn't the Yanhuang bank still lose money?"

Being able to say these words proves that Li Er has done a lot of homework before, otherwise he would not have asked such a sharp question.

Li Ke couldn't help laughing at this moment and said, "I don't need to worry about this father! The reason why the policy of no commission for exchanging money and saving money to earn interest was first piloted in Lantian County is mainly because of the businessmen in Lantian County. Very active, big and small

Shops have sprung up like bamboo shoots after a spring rain, appearing in the cities and squares of Lantian County, and the merchants in the surrounding counties are even more woven. In this case, the merchants in Lantian County naturally need more money than merchants elsewhere. Much taller!

Every month at the end of the month, there is a shortage of money in the Yanhuang Qianzhuang in Lantian County. Now that the people are actively depositing money, it is estimated that there will be no shortage of money in the bank in the future. This is very beneficial for the expansion of the bank. Before that, Erchen and the bank's staff had carefully calculated that according to the current business volume of the bank, as long as the deposits absorbed were less than 500,000 yuan, they would never lose money, or even make big profits! "

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

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

Li Ke replied: "Of course, Father, don't forget that although our bank's loan interest rate is higher than the deposit interest rate, compared with other large private households who lend money at a profit, our bank levies the amount of money levied when it borrows from merchants. The interest rate is really low. Based on this alone, as long as the merchants are short of money, they will definitely come to our Yanhuang Qianzhuang to borrow money. Therefore, there is no need to worry about whether they will lose money!"

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

Li Er had some understanding of civil affairs, and nodded when he heard the words.

This 8% annual loan interest rate may seem a little scary to modern people, but to 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 in the Sui and Tang dynasties, the imperial court set up a special fund called "public capital" for official loan issuance, and its function is somewhat similar to that of a modern bank. The capital of the company is managed by the state decree, who lends 50,000 capital and charges 4,000 yuan of interest per month, with an annual interest rate of about 100%.

Therefore, the loan interest rate of Yanhuang Qianzhuang is simply "a gift from heaven" for those businessmen who are short of money!

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