Time passed slowly, and when Li Yuan and others arrived at Wujia Village, Chongwen Township, Jingyang County, it was already dusk.

There is a trickle of water at the west end of Wujia Village, about three steps wide, and it is drained from the northwest direction and flows through the tender green wheat fields.

According to the villagers, this is an artificial canal called Liuqu. It was founded in the pre-Qin period. The people built it vaguely called Zheng State...

On the north bank of Liuqu, the terrain gradually rose up, which was the Fengshanyuan.

People in Guanzhong usually call high slopes lower than mountains a plateau. The Chang'an Imperial Palace is built on high slopes, facing high ground, and examining the entire Chang'an City.

And that high slope is called Longshouyuan, which is the boundary between Chang'an City of Han and Chang'an City of Tang. Legend has it that when Duke Mu of Qin was sleeping in Yongcheng, he dreamed of a black dragon falling from the sky and winding north to the Wei River to drink water. His journey turned into Longshouyuan. It was named after the western end of the river suddenly rose from the edge of the Wei River, and it was like a dragon's head. This place has always been regarded as the location of the dragon vein in Guanzhong.

The kiln factory in Wujia Village is on the Fengshan Plateau.

"Yingwazi, why are you here? I heard that you are not going to be a maid at the noble man in Chang'an? Why did you run back secretly? If the government knows that this is going to be wanted..."

Wu Fubin is a honest old man with gray hair and deep wrinkles on his forehead when he speaks, revealing his yellow teeth.

He saw the painting screen stepping into the door of the house and was wearing a silk and satin. He looked very different from the pitiful appearance of escaping disasters, and his appearance was strangely radiant.

Therefore, he remembered what the girl said a few years ago when she was visiting relatives by the screen. The girl was sold to a wealthy family as a maid and became a cheap man.

Thinking of this, he was sad, and two turbid tears burst out from his eyes, shouting to his daughter-in-law: "Sanniang, clean up Yingwazi quickly... You don't recognize Yingwazi? It's the girl's woman..."

The daughter-in-law, who was called Sanniang, nodded to Huaping, smiled awkwardly for a few times, walked into the house with a shabby broom, and started cleaning.

The screen was stunned and wiped her eyes without leaving any trace. She was very moved. If the cheap man escaped, the person he took in would be held in Tang Lu.

She forced a smile on her face and said, "Uncle, Yingwazi is no longer a cheap man, she is... she entered the palace and became a female official, and became a concubine next to the Supreme Emperor.

His Majesty, the Prince and others are now outside the door, so my uncle should clean up with his family first and go out to pay a visit..."

Wu Fubin looked at the screen carefully in shock and found that each of the clothes and headdresses she wore was valuable.

He went to Chang'an City to meet those rich ladies, and few of them were as expensive as those of today's painting screens.

How could this be something a maid could have?

"Uncle?" Huaping reminded that there were Daojun and the prince waiting outside the door, so she could not delay too long in it.

Wu Fubin's expression was a bit complicated, both joyful and sad. The joy was that Yingwazi was not a lowly person and became a concubine in the harem. He didn't have to worry about hiding her whereabouts, but the sad thing was that she became the concubine of the Supreme Emperor.

The Supreme Emperor!?

I heard that I was an old man who was old, perhaps much older than him. I am afraid that he might die in the harem in a few years...

Wu Fubin also made funeral objects for Emperor Wen of Sui, and he knew the place of the concubines in the harem. It would be fine if there were children, but if there weren't... he would be buried with the emperor!

And the Supreme Emperor is unlikely to think about it...

"Oh! OK, OK, OK, my uncle has been thinking too much, so let the whole family come out to pay homage to Your Majesty." Wu Fubin wiped the tears with his half-old sleeve and said quickly.

About a quarter of an hour later.

"What? Your Majesty... do you want to participate in the burning of glass in person?" Wu Fubin opened his eyes wide, a little incredible.

"Burning glass is a low-key thing done by craftsmen like villains. Your Majesty, you are so precious, why should you take risks?"

In fact, the glazed glass mentioned in ancient times included three things: one is a translucent jade, the other is a glaze made of silicate compounds of aluminum and sodium, and the third is glass.

In the Shang Dynasty, when making ceramics or smelting bronze, the temperature in the kiln could reach 1100 degrees Celsius to 1200 degrees Celsius. During the firing process, fired products of lead barium and silicate compounds will sometimes be accidentally produced, but this is lead barium glass, which is different from Western soda-lime glass.

"The Emperor of Heaven" records: "The Emperor climbed the mountain of quarry and ordered the people to pick quarry and cast them as tools."

This is the burning of glass.

During the Qin and Han dynasties, it was known that fired glass was made. For example, Wang Chong of the Eastern Han Dynasty said that in the book "Lunheng", he said that in the May Bingwu day, Yangshu could "refining five stones as a tool."

However, ancient Chinese glass was colorful, crystal clear, but it was brittle and brittle, not resistant to high temperatures, and it was difficult to adapt to the sudden cold and hot environment. During the Northern Wei Dynasty, the Dayuezhi people came to China and quarryed five-color glass in the capital, which once made Chinese glass very cheap.

"Did I say I'm going to the kiln factory to make it myself?" Li Yuan looked at Wu Fubin with a little displeasure.

He came to Wujia Village for pure glass. The process of making glass, that is, stained glass in the Tang Dynasty, has become mature.

However, it is almost impossible to make the same glass products from the kiln factory system.

Most of the ancient Chinese science and technology were empirical technology, such as the four great inventions. There was no systematic research, or there was little reason to study why such changes occurred.

For example, the blue and white porcelain born in the Song Dynasty was that the collected "blue and white materials" were ground into powder and then depicted on the porcelain embryo.

As for what mineral stone produces what color it is, whether it is thick or light, craftsmen usually use their experience to control it.

This creates a problem, that is, the glass refined by the kiln factory in Fengshanyuan is not only rare, but also of varying quality.

As for... the creation of pure white glass, the Tang Dynasty is not yet able to master it.

"What does Your Majesty mean?" Wu Fubin asked carefully with fear, cold sweat covered his forehead.

Li Yuan glanced at Wu Fubin with a little dissatisfaction and explained: "A few days ago, Taichang Temple paid tribute to several glass ornaments. I thought it was very wonderful... Later, I learned that this thing was made of ordinary visible gravel, and I was a little surprised.

The loam is transformed into pottery at high temperature, but after higher temperature refining, it will be made into porcelain. The wonder of this change has made me very interested.

Glass is derived from sand and gravel, but exquisite than good jade. Their changes are beyond the size of earth-embryo ceramics.

Therefore, I came here to find out the truth this time, and I will call it... to study things and lead to knowledge!"

The method of firing glass is a trivial matter. What Li Yuan had to do was to introduce new academic ideas and gradually disappear from the disappearance of various schools of thought.

First investigate things, then you will know!

PS: The study of things and knowledge is interpreted as seeking truth from facts in Confucian classics. In this article, the protagonist will gradually use the study of things and knowledge in the Confucian Book of Rites to realize the spirit of modern scientific research.
Chapter completed!