was told by Li Er that he was idle, of course Li Chong had to quibble.

Otherwise, this reputation is bad, but it is not good.

"Actually, the minister is not idle at all, and there are many things to think about every day."

"Oh? For example? ”

"For example, when will Datang be, there will not be enough food in this pass."

Eldest Sun Wuji felt that Li Zhong was talking nonsense, and interjected: "Can this thing be thought of?" ”

"Of course you can think of it. The minister predicted that in about 50 years, the grain in the Tang Guanzhong would not be able to supply the population of Guanzhong, and at that time, it would be necessary to rely on Cao Yun or move the capital to alleviate the crisis caused by this food. ”

Li Chong's words.

It's always so sudden.

After everyone reacted, the eldest grandson Wuji also said: "Why don't you say a hundred years later?" ”

Li Chong said: "What is the urgency of Qi Guogong, I can count it." ”

"So what do you say?"

The eldest grandson Wuji was angry.

Li Chong said: "When the Sui Dynasty was prosperous, why did Emperor Yang of the Sui Dynasty build the Luoyang Palace, and why did he build the Eastern Capital? ”

"That's because he's greedy for pleasure."

The eldest grandson Wuji is naturally authentic.

"That's not right!"

Li Chongdao: "That's because Chang'an's grain may not be enough to eat at that time, and Luoyang is in the center of the world, and has always occupied a favorable geographical position, and all things in various states and counties can be transported to Luoyang by land and water transportation, and the transportation is very convenient." To give an easy-to-understand example, there is a plate of pastries on the table, and the pastries are only so large, and the population, when the country is stable, tends to continue to increase, and even skyrockets, the rulers of all dynasties have only recognized the benefits of a large population, because a large population means more taxes, more taxes, which means more money and food that can be collected for pleasure, but they do not see at all that after the population increases, the pastries will not be enough in the future. ”

"How much stone grain can be produced in one acre of land? A little better land, two or three stones, a little barren, there is also a little more than one stone, but this is the limit of the grain that can grow in the field, at the beginning of the population is small, maybe five people can share five pastries, five people can get one each, but then what if it becomes ten people divided into five pastries? Then there is only half a piece of pastry left per person, what if there are fifteen people, twenty people? ”

"Now that the Tang Dynasty is still at the beginning of the founding of the country, of course there will be no such problem, but in a few decades, the situation of insufficient food will gradually appear because of the rapid growth of the population.

"Therefore, even if everyone says that Emperor Yang of Sui is a tyrant, I still have to say that running the Eastern Capital and opening the canal is a major event that can Zeguo for a thousand years, and his strategic vision is not wrong, but his method is wrong, and he should not rush for quick success. The price of quick success is the loss of the country. ”

Eldest Sun Wuji: "A bunch of nonsense! ”

Wei Zheng said: "I think there is such a reason. ”

Wei Zheng looked at the pastries that didn't exist on the table, and then asked, "Then what do you think is going to solve this matter?" ”

Li Chong: "Simple! Solve it mathematically. In fact, the growth of the population can be predicted, as long as the people of the Ministry of Civil Affairs carefully calculate the new increase in the population of Guanzhong every year, and then compare with the previous year, you will find that although the number of this increase is not exactly the same, but it is always in a small range can be regarded as unchanged, that is, how much it will increase this year, and how much it will increase next year, in mathematics, there is one of the simplest analysis methods, called linear regression, which can fit this situation. Predict how many years later, how many people Datang can have, and then compare the limit of the amount of grain output in Guanzhong, you can calculate how many years it will take, and there will be a crisis in Guanzhong. ”

"Even, from a theoretical point of view, it can be calculated that each household in Guanzhong cannot have less than a few acres of land, otherwise, once these people face a catastrophe, something will definitely happen. When you master this method, you will be able to see the future, and you will be able to arrange the national policy step by step according to the plan, and the granary should store grain for grain, and if there is not enough grain, you will find a way to transport it to other places, instead of waiting until people starve to death, and then you will know the remedy. If there is a person who does not have enough land, and can continue to reclaim it, he will reclaim it, and if he can't reclaim it, then let him leave Guanzhong and go to other places. Give him preferential policies. For example, he didn't have to pay taxes in the past few years, but the state should also ensure that his whole family will not starve to death in the past few years. ”

"Like today's Datang, the population is in the Guanzhong region, Hebei and Henan provinces are the majority, and the population of Jiangnan Province is still very small.

After hearing this, Li Er directly said to Wei Zheng and the eldest grandson Wuji: "This is one of the reasons why I value Li Zhong very much. Remember to hand it over tomorrow. ”

Li Chong: "......"

No!

This can be done in a day or two!

This requires the Ministry of Civil Affairs to provide population registration and land data, and people need to compile and calculate it.

At least for a month or two.

Think about the current population in Guanzhong, there is not one million, there must be hundreds of thousands, even if a household registration book can see all the data of a household, then at least more than 100,000 copies must be summarized, that can be done in one or two days?

"It will take at least a month or two to make it."

Li Chongdao.

"Then I'll give you a month."

“……”

"Two months!"

Li Chongdao.

Then Li Er stared at him.

Don't speak, don't speak, that's acquiescence.

Eldest Sun Wuji felt that he had miscalculated. Yes, he didn't seem to know very well why Li Chongneng was so favored in front of His Majesty from the beginning, until now, he seemed to get a glimpse of something.

Wei Zheng then led to a new topic.

"Speaking of which, I've always been curious, what does the word 'science' mean in this academy?" Li Chong, can you explain? ”

Facing Wei Zheng, who is like a curious baby.

Speaking of which......

He seems to have received a lot of help from Wei Zheng, at least when the eldest grandson Wuji is always targeting him, Wei Zheng always seems to be able to come out and speak up for him.

Of course!

Li Chong also knew very well that Wei Zheng was just on the side of justice, and he was not trying to be friends with him.

Since he was so curious.

Li Chong explained: "The so-called science is actually to understand the principles of the operation of the heavens and the earth, and then apply these principles. ”

"Oh? How to understand? Can you give an example, it's like that pastry just now. ”

"Of course, for example......"

Then, Li Chong went to find the puff boat he had left over from the previous game.