Hearing the concept of Qian Zhuang, Wu Meiniang's face couldn't help but show a blank look.

The real appearance of Qianzhuang can be traced back to the middle and late Ming Dynasty.

Of course, in the original historical trajectory, it would not take many teenagers for Datang to appear in the prototype of a money bank, called a cabinet shop, mainly engaged in the storage and lending of valuables.

It's just that because of the chaos of management and the intervention of the government in the end, it didn't really take shape into a money bank in the end.

And even this kind of cabinet shop has never appeared now.

Therefore, when Wu Meiniang heard Li Su's words, she couldn't help but show a blank look on her face.

Li Su smiled and said: "In the money bank, we can print two kinds of bills. First, we can print consistent, two, five, ten, fifty, and one hundred banknotes. ”

"These banknotes are issued by our Chinese Commercial Bank and can be used in any of our Chinese Commercial Bank stores. It can also be exchanged for copper coins in our bank. With these banknotes, you can greatly relieve the pressure of buying and selling in bulk. ”

"On the other hand, if you have deposited a large amount of money in our bank, we need to register your identity and give him a deposit slip. With the deposit slip, you can withdraw cash at any of our banks and exchange it for banknotes. However, this deposit cannot be purchased directly. ”

Listening to Li Su's words, Wu Meiniang's eyes couldn't help but light up, and she fell into contemplation.

After a while, Wu Meiniang asked thoughtfully: "Your Highness, what will happen if some merchants deposit money in our bank, and their deposit slips are lost?" ”

Li Su smiled and said: "It doesn't matter if he loses it, as long as he can prove his identity, we have a stub here, and we can completely rely on it to reissue a deposit receipt for him." It's just that these deposit receipts are numbered, and his previous deposit receipts have been declared invalid. ”

Wu Meiniang then asked: "Then Your Highness, if he re-applies for a deposit certificate in my money bank in Yizhou and withdraws the money in Yizhou." Then we will run to Chang'an City and withdraw money with the original deposit receipt, so won't we have to lose money? ”

Li Su smiled and said: "If the deposit receipt is lost, he needs to report the loss first, and after a month, he will reissue it." Within a month's time, we will notify all the semicolons that his previous deposit receipts have been reported lost. ”

Hearing Li Su's explanation, Wu Meiniang couldn't help but nodded.

Next, Wu Meiniang asked a lot of questions about Qianzhuang.

Li Su answered for Wu Meiniang one by one.

After a long time, Wu Meiniang finally had no doubts, and only admiration for Li Su was left on her face.

Your Highness is really powerful.

The setting of this money bank is because he came to find a solution to His Highness because of the inconvenience of large transactions, and His Highness came up with it temporarily.

But it's an idea that came up on the fly, and His Highness was able to take all the problems into account, which is really incredible.

Well, if Li Su knew Wu Meiniang's inner thoughts, Li Su was afraid that he would say that this king was just standing on the shoulders of future generations.

There are really too many benefits of opening a bank.

Not only does it facilitate transactions, but it also absorbs a large amount of savings.

At that time, whether it is used for your own business or interest, you can make money and earn a lot of profits.

At the same time, it can also play a role in stabilizing the society and promoting the cohesion of the people......

With the current background of the Chinese Commercial Bank, it has the ability to open a bank.

Of course, there are two more problems.

The first problem is that the opening of a money bank must be supported by the imperial court.

This problem is not a big deal, as long as the powerful relationship is explained to the father, the father will definitely support him.

The other is that you have to find a higher level of physical money.

At present, Datang's monetary system is still immature, and it is far from reaching the point of directly issuing paper money as currency.

Otherwise, it would be possible to issue paper money directly, as in later generations, and leave the trouble of using physical money.

Now, you have to use physical money.

And copper money, the purchasing power is too low.

At this time, silver should be introduced and silver should be the main currency in circulation.

Of course, under the current mining capacity, the silver reserves of the entire Ming Dynasty are extremely scarce.

At present, it does not have the ability to use silver as the main currency in circulation.

However, if you combine it with paper money, you should be able to give it a try.

And if you want to run a bank, you need to get the permission and support of your father.

Before that, it is necessary to list all the issues involved.

Next, Li Su found out all the processes of the later bank from the system, and then combined with some characteristics of the later bank.

It took a whole day to completely improve the process of the bank.

Then, Li Su looked through it again, and there should be no problem now.

Li Su was going to go back to Chang'an City on the second day, and now the time is also at the end of the year, so he will go back to report on his work.

……

Early the next morning, when Li Yu got up, he found that Di Renjie and Wang Xiaotong were together, holding a water scoop, arguing about something.

Li Su saw that the eyes of both of them were red and swollen and bloodshot.

Huo, these two people, they couldn't have slept all night last night, right?

Li Su couldn't help but walk over, frowned and asked, "You two, haven't you slept all night?" ”

Seeing their master, both of them showed shame on their faces.

After getting up and saluting Li Su, Di Renjie said embarrassedly: "Master, we are about to go to sleep!" ”

Huo, I really didn't sleep!

Li Su couldn't help but ask, "What, have you calculated the volume of this water scoop?" ”

Hearing the master's question, Di Renjie's face once again showed embarrassment.

After a long time, he said, "Master, there is a disagreement between the disciple and Master Wang on this issue. The disciple believed that the bottom of the water scoop could be regarded as a sphere. The irregularities above can be divided into countless small spaces, each of which can be seen as a sphere. ”

Wang Fuzi believes that fuzzy mathematics can be used to calculate. Well, his theories are perverse and difficult to understand, and the disciples don't think they are really useful. Master, which method do you think is better? ”

What the?

Fuzzy math?

Good boy, even this thing came up with it?

Of course, the fuzzy mathematics that Wang Xiaotong thought of is definitely not the same thing as the fuzzy mathematics in the sense of later generations.

Hearing Di Renjie's question, Li Su couldn't help but smile slightly.

Next, Li Su found a container with a cube.

This was specially given to Di Renjie by Li Su for him to use for experiments.

Then Li Su slowly scooped a scoop of water, then poured the water into the container of the cube, and said to Di Renjie:

"You measure the size of this cube with a ruler, and you can calculate the volume of this scoop."