"Yesterday, Master Ma asked this question, and the prince hereby solemnly declares that this kind of coal in the world is collectively called coal, and the coal itself is non-toxic, only the smoke produced during the combustion process is toxic, but the toxic smoke can be discharged through the pipeline."

Yuan Zhi didn't specifically talk about carbon monoxide poisoning, which they probably can't accept.

Immediately, he wrote the word 'coal' and drew a diagram of the exhaust of the indoor pipes on a blank piece of paper.

This is easy for everyone to understand, the earthen stoves in the homes of the current households, the earthen kang in the northern families, including the 'warm house' in the imperial city, etc., are not all using smoke exhaust walls.

"Your Highness, the blast furnace calcination process is good, but how to control the furnace temperature?"

This is called Fang Wenguang's general leader, he has a unique vision, and immediately put forward one, the most critical technical difficulties.

The calcination process pays attention to temperature control, not the higher the furnace temperature, the better.

This is similar to the principle of stir-frying.

The fire is small, the vegetables are not cooked, and the taste is not good.

But the fire is too strong, and it is easy to burn the vegetables.

Later generations of instruments for temperature control were digitalized.

But now, it's completely empirical, with a visual nose and nose.

Yuan Zhi understands in his heart that relying solely on artificial visual inspection of nose and nose will make it too different for people to sum up experience and promote it.

Moreover, it is entirely possible that the rejection rate of baking products remains high.

It is necessary to establish a complete set of feasible solutions, with models or references, to support the reminder.

"What is the current method of temperature control in the kiln?" Yuan Zhi asked rhetorically.

"At present, there are no more than two methods: the fire illumination method and the water drop method." Fang Wenguang said.

He then gave the prince a detailed account of his experience with the visual inspection of these two methods.

Yuan Zhi, armed with modern civilization, quickly found a solution.

"Thicken the mud and stone pillars used in the fire, observe the color spectrum produced by the stone pillars after being burned by the fire, that is, the color distribution level, and at the same time, adjust the frequency of water droplets to observe the evaporation rate of water."

Yuan Ze had to use some modern vocabulary, technical words like 'chromatography, frequency, rate'.

Fortunately, he made further popular explanations, and the leaders had strong professional comprehension ability, and after a little pondering, they could understand this meaning.

The leaders saw that the prince spoke very fluently, with pictures and texts, and there were many new words superimposed and embellished, which must have been described in the 'Book of Heaven'.

So, they are convinced.

The current prince is like a master of science and technology, and everyone is watching with admiration, which is very different from the mood when he first entered the side hall.

"Everyone, the materials and processes of blast furnace calcined limestone, we have communicated, after this method is mature, it can be extended to ironmaking and making knives, weapons and other aspects, now everything is ready, only the east wind is owed, that is, to pay close attention to the practice of building furnaces."

Yuan Zhi glanced at the side of everyone, his eyes became sharp, and without waiting for everyone to catch his breath, he ordered:

"Lone is limited to one month for the Ministry of Industry, and in these 30 days and nights, you must make qualified high-purity quicklime, because the dam construction in the disaster area is needed, is there a problem?"

The prince has talked about this, what else do these people in the Ministry of Industry have to say?

Let's just do it day and night.

But no one dares to make a commitment to this matter easily.

Seeing that everyone was silent, Yuan Zhi had no choice but to order, "Ma Feihai listens to the order." ”

"Wechen is here." Ma Feihai solemnly bowed his hand.

"Lonely you are the general supervisor of the blast furnace calcination project, the construction of the furnace and the purchase of materials and other money, by the household department immediately allocated in full, if it can be completed on time or in advance, all personnel will be added to the official rank, if not, demoted or dismissed."

"We're in command."

How dare Ma Feihai excuse himself, he can only take it head-on.

All the officials of the Ministry of Works understand.

The one-month deadline is actually a military order, which is a bit of a king and a loser.

Now, everyone's heart is heavy.

"Lord Wei of Zhan Shifu."

"Wechen is here."

"To the prefecture and the prefecture and county yamen in the area of Youzhou, the prince's decree was promulgated, allowing all localities to organize exploration teams to prospect for mines in the mountains under their jurisdiction, but all those who have discovered copper, iron, coal and other mineral deposits will be reported to the imperial court, and the relevant meritorious personnel will be rewarded for their meritorious deeds and promoted to knighthood."

Yuan Zhi stroked the tiger's whiskers with his hand and ordered confidently.

In the area of Jindi, there are treasures underground, and there are many open-pit coal mines and open-pit iron mines hidden in the mountains.

All these are precious resources of the country and major events related to people's livelihood and national economy.

"Wechen obeys." Wei Changjin arched his hand and said loudly.

At this time, the eunuch came in to report that at noon, it was time for the prince to have lunch.

"Ouch, unconsciously half a day has passed, pass the decree to the imperial dining room, add more dishes, or fruit wine, etc., and I want to have lunch with the secretaries, in the side hall of Zhengyang Palace."

"Yes." The chamberlain withdrew in small steps and went to the imperial dining room to set up.

"Zhongqing, tomorrow is the Mid-Autumn Festival, according to the court system should be the official bathing day, presumably you will not get a rest, today I ask Zhongqing to stay, have lunch together, slightly express the prince's apology, I wish Zhongqing a happy holiday in advance."

Yuan Zhi said to everyone.

"Thank you, Your Highness."

"This is all within the minister's duty, Your Highness is polite."

……

The next day, August 15, the annual Mid-Autumn Festival, which is a major festival in all dynasties.

According to the rules of the final Jin dynasty.

On August 15 and 16, the whole country celebrated the festival.

All large and small yamen are closed for two days, and officials are also on holiday for two days, which is 'bathing' in ancient times.

On the 15th day of August, from the fifth watch, Chang'an City has been very lively.

It was early in the morning.

The crown prince Yuan Zhi entered the Zichen Hall and greeted the imperial father.

Because it is the Mid-Autumn Festival, all the royal members in the capital, from the queen and the crown prince to the prince, the prince of the county, the princess, the emperor's concubines, etc., will go to the Zichen Hall to ask for peace.

Jiye Emperor Yuanren, after the first bloodletting treatment, his health state has greatly improved, at least his spirit is very different from before.

No more coma.

I saw him smiling, half-lying on the dragon couch, accepting the greetings of the royal family, conscious, asking everyone one by one about the current situation, and chattering non-stop.

According to court common sense, on the night of mid-autumn, the emperor will hold a banquet in the Taiji Palace.

Nowadays, the emperor cannot act, so the Mid-Autumn Banquet has been suspended for several years.

This year, the queen has been canonized, and the queen can preside over according to the law.

But Cao Feiyan is not happy, showing up like this, working hard, and often thankless.

No, it's still closed.

When saying goodbye to the Zichen Palace, the queen mother invited the prince in a low voice to go to Funing Palace in the evening to have a dinner and admire the moon.

The prince gladly accepted.

It was only noon when I returned to the East Palace, and I saw Concubine Lan, Luan Feng and Xiao Cui, two concubines, with a group of palace ladies and little eunuchs, ready to take advantage of this festival opportunity to go shopping.

It's in the nature of women to go shopping, who doesn't like it?

Locked up in the East Palace all day long, like a caged bird.

Not fooling around, of course.

More than a month ago, on the banks of the Seoul River, there was a "Mid-Autumn Night" temple fair.