In later generations, the definition of "meter" originated from France.

The length of 1 meter was originally defined as one ten millionth of the distance from the Earth's equator to the North Pole on the meridian passing through Paris.

And with the deepening of human understanding of metrology, the definition of the length of the meter has been revised several times.

Lu Zhou once told Song Yingxing that the unit of meter should be determined to replace the most commonly used step as a measure.

Song Yingxing saved the trouble now and took samples directly from Lu Zhou's feet, which seemed to be able to flatter him...

In Lu Zhou's view, this approach is not very scientific, but it will definitely need to be revised later. What is needed now is unified measurement.

"Song Aiqing, are you too casual?"

Lu Zhou was a little surprised. He had thought that Song Yingxing would do some calculations first, or consider it from a more comprehensive aspect.

But now he directly measured his steps. This approach was somewhat unlike Song Yingxing's usual scientific and rigorous style.

"Your Highness, using your body as a ruler has been practiced since ancient times.

All saints and kings who rule the world have examples of using their bodies as a standard of measurement.

It can be traced back to Dayu's flood control work at the earliest.

In the Tang Dynasty, Li Shimin also used one step to his left and right as a measure of length..."

Song Yingxing cited many examples.

The general meaning is that the king of Xia has not yet ascended the throne and proclaimed himself emperor, but he can control a vast territory, which can be used as a reference for the measurement of the world.

After Lu Zhou explained it, he had some impression.

Taking the emperor's body as a ruler is not only true for China, but also from ancient Egypt to the Roman Empire.

It's not something unusual.

Furthermore, in later generations of English words, ruler also means foot.

The measuring stick of the British Empire was also measured from their queen, and was later used in many lands where the royal flag was planted...

"Your Highness, please extend your finger."

Song Yingxing then stretched out his index finger and asked Lu Zhou to do as he was told. He measured the length strictly with a cloth ruler, then carefully recorded it on the mold and carved out the length.

"Your Highness, from now on, just one finger from Your Highness will mean an inch of the world!"

Song Yingxing said with a smile.

Lu Zhou shook his head helplessly. For the entire afternoon that followed, Song Yingxing measured King Xia several times, taking samples one by one from his stride to his soles to his arms before he was done.

During this period, Lu Zhou stayed with Song Yingxing for lunch.

The two once again determined matters related to the national time system and determined the official working system of various industries.

In the past dynasties of the Central Plains, in addition to months, there was also the concept of "week".

Officials in the past dynasties had five days off and two days off, or six days off and one day off from the day before. They also had holidays on holidays.

Lu Zhou's current plan is to have the Xia Kingdom's festival customs follow those of the Central Plains. After all, the Xia Kingdom has a vast territory, but the main population is still Han Chinese.

At the same time, because Xia State is in the construction period and has a lot of work, the vacation system used by officials is to take six days off and one day off.

The same goes for other production plants...

"Your Highness, judging from the current development of the Xia Kingdom, the six-rest-one system may be somewhat difficult.

If it is implemented concretely, it will probably become a monthly holiday.

There are too many things that each department has to do..."

Song Yingxing reminded him when he left.

The Xia Kingdom now has more and more officials, and many departments have emerged as the times require, but there are still endless official documents to be processed every day.

The Kingdom of Daxia was different from the original Yuan Dynasty. Not only did it occupy a vast territory, but it also had to establish a formal state and dynasty system, cultivate folk customs, and develop science and education.

There are so many tribes and ethnic groups involved, and all kinds of things are naturally complicated...

In particular, the Xia Kingdom gradually entered the mature steam industry era.

The people of Xia gradually realized how precious the natural resources in this vast land were.

With the gradual development of oil, natural gas, minerals and other resources, the number of production situations has increased, and various tasks have become more complicated.

...

Song Yingxing left the palace.

The measurement samples obtained so far need to be sorted out in detail later.

In addition, there are issues such as the concept of daily time... These are very complicated tasks that cannot be considered in a short time.

Judging from the current situation, even if a unified measurement standard is made, it can only be tried out in a few big cities and the military.

It will take a long time to achieve complete standardization across the country.

Or relevant regulations and provisions may be added later to force all sectors of industry and commerce to unify standards.

Song Yingxing kept thinking about the future situation...

In the next few days, Lu Zhou's things on his hands gradually became less and less, because it was the late autumn season, and all parties were busy harvesting crops, so it was rare for another war to break out.

In the last year of its life, the Ming Dynasty seemed to be returning to its glory days. There were no disasters in Mingbei this year, and crops could be harvested normally.

But the regrettable thing is that many lands in northern Ming Dynasty are no longer controlled by the imperial court. Apart from Xuanda and Gyeonggi, Emperor Chongzhen has no other trump card.

Xia Kingdom also ushered in a bumper harvest this year.

From the Hetao Plain to the many cultivated fields in Monan, the fields are golden and the harvests are excellent.

The crops in the Xia Kingdom gradually became more abundant, ranging from wheat, rye, highland barley, to potatoes, sugar beets...

After several years of seed selection and cultivation of potatoes, the current yield per acre can exceed the average yield of wheat fields by 20%.

This means that in the future, residents in the Far North will basically be able to rely on potatoes to provide most of their food rations.

This can also speed up the pace of Xia's colonization...

Lu Zhou finished inspecting the harvest on the outskirts of the city and then moved to another manor.

Over in North Korea, there has been more and more intelligence recently, and Lu Zhou had no choice but to come here to see Li Hao's situation.

The crown prince of the Joseon Dynasty is very different from the Ba Shu and others that Lu Zhou originally captured. After all, Li Hao still has a complete kingdom waiting to be taken over.

As long as freedom is restored, restoration is possible.

Moreover, Korea has not been annexed by the Central Plains for many years, and it has its own pride.

Lu Zhou couldn't believe that Li Hao was willing to stay in this manor honestly.

"Your Highness, King Xia, why are you here?"

Li Hao was alerted by the commotion outside and hurriedly ran out to greet him. He saw Lu Zhou walking in with leisurely steps and long strides.

"If you have nothing to do, come in and take a look.

I am worried that the prince will not live comfortably.

There is also news about North Korea that has recently come back, and I would like to share it with you..."

Lu Zhou stood with his hands behind his hands and a smile on his face.

"So... so good!"

Li Hao was concerned about Korea, but he was also frightened by Lu Zhou's sudden arrival.

He was worried that he might reveal his true thoughts and be caught by King Xia.

During this period, Li Hao read a lot of newspapers related to the Xia Kingdom. If the above situation is half true.

Then the Xia Kingdom is strong enough to annex North Korea...

"King Xia, please speak. I am willing to listen attentively!"

Li Hao tried his best to look calm.
Chapter completed!