The little princess' mind was read, and the court and harem were eating melons

System: [It’s actually normal. Even in modern times, there are news reports of houses being crushed when there is heavy snow.]

Li Qingyi: […Sorry, I really haven’t paid attention to the news on this.]

She was born in the south, and except for a certain year when there was heavy snow all over the country, whether you could see snow in winter depended entirely on luck.

Later, when I studied and worked, although there was a lot of snow in the winter, it was a city with heavy snow every winter, and it was impossible for the construction to not take this situation into consideration, so naturally there was no case of houses being crushed by the snow.

System: [Well, according to you humans, this is actually related to the snow load. ]

Li Qingyi: [Hmm?]

System: [The value of snow load is directly related to how much snow a house can withstand, but this is a term in construction, so it’s not surprising that you haven’t heard of it. ]

System: [Ordinary people don’t need to pay much attention to the houses they live in. Sometimes it’s good enough to provide a shelter from the wind and rain.]

Li Qingyi was silent for a long time as he looked at the black box that Fang Xin had neatly packed away on the table in front of him.

System: [Host? What’s wrong with you? ]

Li Qingyi took a breath, stood up and asked Fang Xin to ask someone to carry the box to the Qianqing Palace.

At the same time, she answered the system in her mind: [Nothing, I just feel that the lives of ordinary people are so hard. ]

I just feel like she seems to have it too easy.

I feel inexplicably guilty.

I don't feel guilty about the easy life she has, but I feel guilty about her previous attitude.

Li Qingyi has always felt that there is nothing wrong with her principle of "taking care of oneself when poor". She herself is not a very capable person. Maybe her grades were pretty good when she was in school, but she is far from a true genius.

In other words, Li Qingyi never thought of herself as someone who could accomplish great things from the beginning. She was very self-aware and had long passed the age of middle school, so she would not think that she was the protagonist just because she traveled through time.

She's just an ordinary person.

No one forced her to do anything, so Li Qingyi remained silent.

But Wang Xuan’s attitude was different from hers. Although Wang Xuan didn’t say it directly, Li Qingyi could actually feel that Wang Xuan really wanted to do something.

So is Li Zhu.

Don't say that Li Zhu had to do it because of the prince. Given Li Zhu's background and physical condition, if he really wanted to give up, neither the prince nor the emperor would force him to get involved.

The only reason Li Zhu could hold on until now was because he also wanted to do so.

And now, it’s Li Qingyi’s turn.

"I can't go on like this." Li Qingyi sighed inwardly, "After all, I am the teacher, I can't always let my students walk ahead of me."

Qianqing Palace.

Huang Kang: "Your Majesty, the eleventh princess is here to pay her respects."

The emperor was reading a memorial with an account book specially sent by the Ministry of Revenue next to him. When he heard Huang Kang's words, he turned his head slightly and looked in the direction of the door: "Let her in."

After a while, Li Qingyi entered the room. As soon as he walked in, he was hit in the face by the heat in the room. He reached out to untie his cloak and handed it to Fang Xin. He looked at the two eunuchs following behind him, who came in carrying a medium-sized box.

Li Qingyi had a faint smile on his face, not as bright as before, and he stepped forward to salute.

The emperor could tell at a glance that Li Qingyi was not in a good mood at the moment. He raised his eyebrows, put down the memorial in his hand and stood up. "Get up, why do you look unhappy?"

As he spoke, the emperor took Li Qingyi's hand, turned his head and looked at the box that had fallen to the ground, and asked: "Also, why did you ask someone to carry a box here today? What's in it?"

Li Qingyi pursed her lips and said, "I'm not unhappy, but I'm not very happy either."

Then he answered the emperor's second question: "This is something I have been working on these days. It may be useful. I am sending it to you for your father to have a look."

The emperor raised his eyebrows.

For some reason, Li Qingyi was not in the mood to play the role of an innocent little baby. Without looking at the emperor's expression at the moment, he walked to the box and opened the lid, revealing a few pieces of black honeycomb coal padded with paper inside the box.

Then, she briefly described the uses of honeycomb briquettes.

In fact, it is just a substitute for coal. There is nothing much to say about it. I just want to talk about the advantages of honeycomb coal compared with the coal and firewood commonly used by people today.

Li Qingyi's baby voice rang out in the house: "...Compared to ordinary coal, these coal balls are more efficient and flammable because of these holes. They burn faster, have good firepower, and last a long time."

"And if I'm not mistaken, this stuff is less toxic than ordinary coal, but it still requires ventilation when used."

"But more importantly, it is cheap to make. Wood is one of the main raw materials, and both pine and cypress are fine. But you can also use waste wood or crop residues such as straw."

Li Qingyi blinked when he said this, then looked up at the emperor's eyes and said, "Father, you can ask someone to try it. This thing can be used to grow flowers after it is burned."

As for whether it can be used to grow vegetables, Li Qingyi is not sure. She only remembers that some people used it to grow flowers. It seems that it was because after this thing was mixed with soil, the porosity and water absorption of the honeycomb coal were very suitable. She didn't understand more.

The emperor's expression showed nothing unusual. He smiled gently and looked at Li Qingyi: "If it is really as Yi'er said, then this can indeed be called a good thing."

“It’s good for the people.”

Hearing this, Li Qingyi breathed a sigh of relief and looked at the black box of "treasure" again.

Li Qingyi said: "Father, please give it a try. If you think it's suitable, I want to set up a workshop to make this and sell it."

After a pause, Li Qingyi said, "In fact, we can also make a stove that uses these coal balls."

However, the recipe for the stove is different, and Li Qingyi hasn't bought it yet because she didn't think of it before.

The emperor then asked, "Under whose name should Yi'er be sold?"

Li Qingyi blinked, not looking at the emperor's expression. After a moment of silence, he said, "If it is really useful, there is no need to specifically say in whose name it is used. This should be just a very small business."

Emperor: “Oh?”

Li Qingyi explained softly: "I want to set the price at one penny."

The emperor raised an eyebrow: "One penny?"

Li Qingyi nodded: "Yes, one penny each."

The emperor thought for a moment, then asked, "Yier, do you know what one penny can buy?"

Li Qingyi: "I know, eggs are about three cents each."

The emperor touched his chin and said, "Do you know how much one hundred kilograms of coal costs nowadays?"

She really didn't know this.

System: [Host, I know that the average price of coal in the capital today is one penny per hundred catties, which is 100 coins! ]

Li Qingyi: ...

Li Qingyi: "Then... ten for one penny?"

Oops, it seems her concept of money still doesn’t match the actual situation!