saw Li Su's movements and heard Li Su's explanation.

Di Renjie and Wang Xiaotong first showed a look of surprise on their faces, and then a look of sudden realization, but in the end they were ashamed.

It turns out that the question is so simple.

As long as you think differently, you can easily solve the problem.

It's ridiculous that the two of them couldn't think of the right way to solve the problem after thinking about it all night, and half of the day.

It seems that the gap between them and His Highness is really far, far away.

Seeing the expressions on the faces of the two, Li Su smiled and said, "Actually, your ideas can't be said to be wrong. This is to calculate the volume of the water scoop, of course, it can be calculated in this way, the water scoop can be filled with water and poured into other containers to convert. ”

"But what if you want to measure the volume of a reservoir or a pond? Then there is no way to make the conversion. And the methods that both of you think of have merit. When you have nothing to do, you can try your method to see how much error there will be with your method and the actual quantity, and how to reduce this error. ”

Hearing Li Su's words, Di Renjie and Wang Xiaotong couldn't help but show thoughtful expressions on their faces again.

……

In the afternoon, Li Su came to Chang'an City.

In the city of Chang'an, there is also one of his Shu palaces.

However, there were only a few servants left inside to clean the room and guard the door.

Now that the princess has followed him to Yizhou, Li Su is not in a hurry to go back.

Then, Li Su came directly to the palace, first went to the Hanxiang Palace, and went to visit his mother Concubine Yang.

After arriving at the Hanxiang Palace, Li Su rewarded those palace maids and wrestlers as usual, which made them all very happy.

"Your Highness, the third highness has come down and is in the house!"

Oh? It turned out that the third brother Li Ke came?

Li Su hurriedly walked into the room, this time the mother and son reunited, talking about themselves together, and they didn't need to mention it much.

However, Li Su found that after the third brother came, he didn't seem to be treated very well by his mother.

Well, okay, don't look at Li Yuyuan's in Yizhou, thousands of miles away from Chang'an.

But I can't stand it, and now there is a train between the two places.

And when it's okay, Li Su can take the train back to Chang'an.

This year, Concubine Yang also went to Yizhou City.

Speaking of which, the mother and son have met several times this year.

And Li Ke can only come back once a year.

From this point of view, the mother concubine naturally felt more apologetic when she saw the third brother.

……

The two met Tang Emperor Li Shimin, and then Li Shimin questioned Li Ke carefully.

For Li Su, he basically ignored it.

Well, for the development of Yizhou, Li Shimin himself has been there many times, so naturally he is very clear, and he doesn't bother to ask Li Su again.

After Li Ke finished reporting the fief, the two brothers left off, but Li Su was left behind by Li Shimin.

After Li Ke left, Li Shimin glanced at Li Ke and asked, "Anyway, don't you have something to report to your father?" ”

Well?

Hearing Li Shimin's words, Li Su couldn't help but be a little dumbfounded.

Is my father so powerful?

Before I could say anything, he guessed that he had something to report to him?

Li Su blinked his eyes, and then asked, "Father, then you can guess again, what does the son want to report to his father?" ”

Li Shimin was amused by Li Su's laziness, and couldn't help but reprimand: "Don't follow me hippie smiling face, if you have something to say, let it go." ”

Li Su grinned and said: "Father, that's the case, the son wants to set up a money bank in Yizhou, so I will ask my father for instructions first." After the establishment of Qianzhuang, it can play an immeasurable role in the economic development of our Datang. ”

Well?

Hearing Li Su's words, Li Shimin's eyes couldn't help but light up.

It's absolutely amazing to be able to make Su'er so respectful!

Thinking of this, Li Shimin couldn't help but ask: "Su'er, then tell me, what is the existence of this money village and what is its function?" ”

Hearing Li Shimin's inquiry, Li Su immediately described the role of Qianzhuang.

Then, he listed the money bank process and handed it over to Li Shimin.

After listening to Li Su's description of Qian Zhuang, Li Shimin's face couldn't help but show a thoughtful look.

As a generation of Ming monarchs, Li Shimin has long been aware of the inconvenience of using copper coins as the main circulating currency.

First, once a large transaction is carried out, the amount of copper coins required is too large.

It is not convenient to carry and count.

Second, the amount of copper mining is extremely limited every year, and copper coins are becoming more and more insufficient.

Once there is a serious shortage of money, it will have very terrible consequences, and even the entire economic system will collapse.

The emergence of money banks and the printing of banknotes can solve these two problems very well.

Li Shimin immediately opened Li Su's strip and watched it carefully.

This look is half an hour smaller.

Li Su, who was sitting on the sofa, was bored and began to yawn.

Over there, Li Shimin finally digested all the strips.

I also have enough understanding of the money bank.

Li Shimin couldn't help asking: "Sorry, I think that it is the right way for this money bank to be opened by the imperial court." The name will be Datang Qianzhuang, what do you think? ”

Suddenly!

Are you trying to cut off your beard?

Hearing Li Shimin's words, Li Su couldn't help but feel dumbfounded.

Is that all that natural for you to say? Don't you feel ashamed at all?

However, Li Su also has to admit that if it is opened by the imperial court, it will be more justifiable.

It can even replace copper coins with paper money.

But there is one point, with the current imperial court, it can't be opened at all.

Li Su smiled slightly and asked, "But father, does the imperial court have enough money to pay?" Once there is a fault in the funds, and the customer holds the slip and cannot exchange it for cash, then the court will no longer have credibility at all. And this banknote, I'm afraid it will really become waste paper. ”

Li Shimin, who was originally happy, couldn't help but ponder again after hearing Li Su's words.

After a long time, Li Shimin had to admit that what Li Su said was indeed very reasonable.

Is the imperial court rich? Naturally, there is money.

But there are also many places where the imperial court spends money.

Once there is a disaster year, the imperial court does not have enough reserves, and there is a time when it cannot be exchanged for cash, then something really will happen.

In this way, it is really appropriate for Li Su to do it.

Regarding Li Su's ability to make money, Li Shimin has no doubts at all.

The emergence of Qian Zhuang can be said to be the best way to solve the difficulties faced by Datang.

But Li Shimin was groaning and didn't agree for a long time.

Li Su soon understood what Li Shimin was afraid of.

He is now the Jiedu envoy of the entire Jiannan Road, with territory and soldiers and horses in his hands.

Now that there is another money bank, there are really too many chips in his hand, which has already threatened Li Shimin's throne.