There were four cold periods in the history of China.

The first cold period lasted from 1000 BC to 850 BC, that is, the early Western Zhou Dynasty, and there are almost no relevant historical materials.

The second cold period lasted from 1 AD to 600 AD, which was the period of the Eastern Han Dynasty and the Southern and Northern Dynasties.

The third cold period was from 1000 to 1200 AD, that is, the two Song Dynasties.

The fourth cold period was from 1300 to 1900 AD, which was the severe cold period of the Ming and Qing Dynasties.

Unfortunately!

The late Han Dynasty and the Three Kingdoms period were the second cold period.

Among them, during the 55 years of Emperor Wu of the Han Dynasty, Liu Che, three snow disasters were recorded in history.

In December of the first year of Emperor Wu's reign, there are historical records: heavy rain and snow, many people froze to death.

How big is the heavy snow? Judging from the fact that many people were frozen to death, this snow is definitely not ordinary.

What a pity!

Seven years later, there were two consecutive snowstorm years!

March of the second year of Yuanding and March of the third year of Yuanding.

There has been a series of extreme late-spring cold weather.

So what is late spring cold?

In short, it is a season when the temperature should have quickly returned to normal, but the temperature suddenly dropped sharply, as if it had returned to a severe cold period.

This is so fucking harmful!

Historical records record that the heavy snow in March of the second year of Yuanding was"five feet thick on the flat ground"!

The situation in the third year of Yuanding was even worse than that in the second year of Yuanding. In March of the lunar calendar, the river water in the Central Plains area would not freeze. However, it actually froze this year. Can you believe it?

And in April of the lunar calendar, there was another heavy snowfall!

In more than ten counties and counties in Guandong, the people lacked food and clothing, were suffering from hunger and cold, and human tragedies of Yi Zi cannibalism abound.

Wang Hao is a time traveler!

Although it can't change the climate, it can still provide some relatively advanced heating conditions.

After the surrender of the Yellow Turbans, Taishan County's population barely reached 500,000, but under the cold weather, it was still very possible for one or two out of ten to die!

In order to avoid such a tragedy, Wang Hao could only prepare in advance!

This floor heating system is one of his important measures to combat the severe cold.

In the prefect's mansion.

At this time, a group of craftsmen were sitting around, and they were all studying the floor heating schematic diagram given by Wang Hao.

"Hey, Old Suntou, you are the most senior here. Have you ever seen this kind of thing before?"

"yes! With such a thing, we can survive the winter safely? Why do I not believe it so much!"

"You don’t believe it, and neither do I!"

"Hey! If you don’t believe it, let’s just go home and wash up and sleep!"

"......"

When everyone was confused.

Liu Ji followed Wang Hao back to the prefect's mansion.

Wang Hao didn't hesitate and asked directly:"What? Is there anything you can't understand?"

Old Sun bowed his hands:"Sir, the little old man can't understand your floor heating diagram at all. It's outside the house. Dig a hole, what are you doing?

"~~~

This is a rhythm that I don’t understand at all!

Let’s explain it to them from the beginning!

Wang Hao took the drawing and explained:"This pit, I call it the work pit, is specially used to burn things and provide heat. The heat will spread along the underground flues, making the house hot." Have you?"

Old Suntou nodded with interest:"Oh~~~I see! Could it be that this hollow wall is also used to allow heat to move and warm the room?"

"You're only half right! Wang

Hao continued to explain:"You can call this wall a hollow wall, but I call it a sandwich wall. There is a flue inside the sandwich wall, which is used for exhaust. Otherwise, so much air is trapped underneath, and we can't put it out." The ground is choked!"

"If the rooms are relatively large or there are many, these flues will have a thicker one, which I call the main flue, and will be divided into each room. The relatively thin flues will be called branch flues."

"The work pit should be set up outdoors, about waist deep. When not in use, cover it with a thick wooden board, just like on the ground. When in use, open the wooden board and burn the things before people come out."

"......"

A crowd of people gathered around Wang Hao. Shi'er nodded to express understanding. Shi'er shook his head again and asked some questions.

Wang Hao taught everyone the working principles of the floor heating system and some relative precautions during construction in extremely popular terms, which were simple and easy to understand.

Liu Ji's shoes on the side also listened very carefully. After all, he will be in charge of the house renovation project in the future. If he has no technical knowledge at all, how can he manage it?

"The exhaust duct should also be outdoors. This can avoid soot pollution and ensure that the hot air flows along the main and branch flues to each smoke chamber and the ground to ensure that the heating area is uniform and gentle."

"Moreover, this kind of fire channel can also go directly under the bed in the bedroom to form a"warm Kang" and a"warm pavilion", which can make the whole room feel warm like spring."

Old Suntou suddenly understood and nodded:"Wonderful! How wonderful! This is the first time in this little old man’s life that he has seen such an exquisite floor heating system!"

"Wow~~~It would be so happy to live in a house like this in winter!"

"Then you must study hard and try to turn all the houses in our Taishan County into this, so that no one will freeze to death in winter!"

"Ha ha! Not just Mount Tai, we will strive to let all the people in the north live in such houses in the future!"

"......"

Wang Hao smiled calmly:"It's good if everyone can understand!"

After that, he turned to face Lao Suntou. This guy was the oldest. Wang Hao recognized him at a glance. He was the leader of this group of craftsmen:"How about it? How sure are you that you can make it?"

Lao Suntou thought about it carefully:"About 70%! I should be 70% sure!"

"very good!

Wang Hao was overjoyed and ordered:"Bowen!" First, let them make a sample according to the drawings. After passing the inspection, they will use this as a standard to organize construction workers to carry out large-scale construction!

Liu Ji bowed and said,"No!""

In modern enterprises, the system of planning first and leading by example is very mature.

Especially in this new technology and new technology, the system of leading by example must be implemented solidly.

Because you don't know what will happen in practice. It’s a matter of details.

Only after you have completed the sample in a down-to-earth manner can the problem be exposed.

Only when you have thoroughly mastered this technology and obtained approval can you start construction.

Wang Hao brought this advanced management concept into In his daily management.

He sighed:"If there are any problems in the process, be sure to communicate more and report early, so as to avoid making mistakes. Otherwise, if you fail, don't blame me for being unkind and letting everyone tear it down and rebuild it."! Old

Suntou hurriedly agreed:"Don't worry, sir. The little old man must communicate more and report early!"

Wang Hao smiled lightly:"Then hurry up. In three months, winter will come. Whether the people of Taishan can have floor heating depends entirely on you.""

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