Reborn Tang Emperor Li Chengqian

Chapter 474 Weights and Measures

The news of the Anxi Protectorate's recovery of the Persian Khorasan area was sent back to Chang'an. Li Chengqian was very happy and praised them greatly.

And set up the Governor's Mansion in the Khorasan area, with Belus as the first Persian Governor. The Governor's Mansion is different from the Dufu Mansion and the Dudu Mansion. It has autonomy, but is restricted by the Duhu Mansion.

Dashi's envoys came to Chang'an, met Li Chengqian, brought the caliph's meaning to him, and presented treasures as a token of sincerity. From then on, Dashi and Datang became brothers.

Li Chengqian originally planned to send troops to attack Dashi, but after thinking about it, the battle line was too long, supplies were difficult, and Dashi's power was strong now.

If you fight against it, it will only drag down Datang's economic system, and the gains will outweigh the losses. Doing so may also allow Tubo to take advantage of it.

Regardless of the serious damage to Tubo's strength, once Datang's strength is seriously damaged, Tubo is likely to make a comeback.

After repeated weighing, Li Chengqian finally decided to agree to make peace with Dashi, acknowledging that except for the Khorasan area, other areas that do not belong to Datang belong to Dashi.

The territory occupied by Dashi that originally belonged to Datang was returned to Datang, and Datang and Dashi signed a brotherhood agreement, and the two sides carried out trade.

"Everyone! The Minister of the Ministry of Industry handed over a brochure, and please read it." Wang Quan gave a copy of the Ministry of Industry brochure to Li Chengqian.

"This booklet will be sent to the East Palace first, let the crown prince look at it first, and after trying to deal with it, show it to me." Li Chengqian said.

It's time to experience the prince's ability to govern the country. It is correct to let him handle some government affairs first, and then guide him from the side.

"Promise!" Wang Quan took the order, picked up the booklet on the table, called an eunuch, and asked him to send the booklet to the East Palace for the crown prince.

After Prince Li Jue read the memorial, he summoned the officials of the East Palace to discuss it, then made comments on the memorial and sent it to Li Chengqian.

After Li Chengqian read Li Jue's comment, he ordered Li Jue to be called to Zichen Hall for questioning.

"I have seen my father!" Li Jue saluted.

"No courtesy! Sit!" Li Chengqian said.

"Thank you, father!" Li Jue sat down in thanks.

"I've seen your comments on the paperwork handed over by the Ministry of Industry, and you've read the paperwork from the Ministry of Industry. Do you think the matter mentioned by the Ministry of Industry doesn't need to be changed?" Li Chengqian asked.

"The Ministry of Industry stated in the memorial that the current weights and measures are not fine enough and are not suitable for the production of precision instruments in Datang, and requested to revise the weights and measures."

"The current weights and measures were revised during the Emperor Taizong's time. Both the ministers and the ministers felt that there was nothing wrong with them. Therefore, the ministers felt that there was no need to modify the weights and measures. Just use the original ones." Li Jue said.

The so-called weights and measures actually refer to the utensils used to measure the length are called degrees, the utensils used to measure and calculate the volume are called quantity, and the tools used to measure the weight of objects are called scales.

The length of the Tang Dynasty is based on Tang Taizong's double step (one step for each foot on the left and right) as the size standard, called "step", and stipulates that three hundred steps are one mile.One-fifth of a "step" is one foot.

Ten feet is one zhang, fifteen hundred feet is one mile, and other weights and volumes have corresponding units, such as liter, bucket, dendrobium, stone, etc.

Compared with later generations, there is some deviation. One mile in later generations is equal to 500 meters, but in Tang Dynasty, one mile was only 454.2 meters, which is 500 meters shorter than 45.8 meters.

In fact, to be honest, the current calculation method of weights and measures is still acceptable, and there is no need to change much.

However, the length of rulers in the Tang Dynasty was between 28 cm and 31 cm.

In this way, there will be some deviations in the measured scales, so Li Chengqian decided to make all the measured rulers the same length.

"Nowadays, there are differences between the north and the south, and the lengths of rulers vary from place to place. Not to mention, there are also differences in the length of people's steps."

"So, I decided to fix the length within a certain range, and no longer use steps to measure the length." Li Chengqian said.

The length standard of later generations is good. Li Chengqian plans to change the time to a 24-hour system according to the length, area, capacity, etc. of later generations.

"How does Emperor Father plan to change?" Li Jue asked.

"Let's change the current time first. We used to use twelve hours a day, but now we change it to 24 hours a day." Li Chengqian said.

"24 hours?" Li Jue asked in confusion.

"Yes, 24 hours, that is, one hour is divided into two hours, one hour is equal to six 10 minutes, and one minute is equal to 1 seconds. It will be much more accurate if you use all numbers." Li Chengqian said.

Li Jue thought about it, and it is indeed much more accurate than using twelve hours.

"But father, how do you apply this to real life?" Li Jue asked.

That's right, unlike later generations, there are clocks and watches to calculate the time, and there is no such thing as clocks in the current Tang Dynasty.

"I have already thought about this, and I have my own way to deal with it, and you will know when the time comes." Li Chengqian said.

The calculation of time can be solved with an hourglass, which is not a problem at all, and the hourglass is exactly 1 minute.

The time problem has been solved, now it is the length problem, but fortunately Li Chengqian was prepared and made a length standard.

"The next thing is the length. The basic length is defined as one meter, one meter is divided into ten parts and one decimeter is one meter, one meter is equal to ten centimeters, and one centimeter is equal to one millimeter."

"One mile is unified to 500 meters, and 1000 meters is equal to one kilometer, which is two miles. This is more accurate." Li Chengqian said.

In this way, there will be no deviation in the measurement of the land in the future, and it is possible to prevent anyone from making a fuss about it.

After hearing this, Li Jue also felt that this calculation is more accurate, so that the lengths are all unified, and it is not so confusing.

Taking steps as the unit, there will be deviations due to the size of individual steps. Now that the length is the same, there will be no error.

"The next thing is the weight. We can first make a box with a length, width and height of 10 centimeters, fill it with water, and define it as a kilogram, which is 2 catties, which is equal to 1 kilogram."

"We can define 1 tael as 50 grams, and 500 grams equals 1 catty. What do you think?" Li Chengqian asked.

"My son thinks it's feasible. It's simple and convenient. Not only the length, time, but also the weight can be more accurate. But now how to convert one stone." Li Jue said, and raised his own doubts.

"It's very simple. Just convert one stone of grain into a weight of 120 catties. Other things are liters! Dou! All are converted into new algorithms, and all the original ones are discarded." Li Chengqian said.

"So, my son understands what to do!" Li Jue said.

"Okay, since you know what to do, I will leave this matter to you." Li Chengqian said.

"No! Your servant will leave!" Li Jue hastily bowed and retreated.

(End of this chapter)