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

The Queen didn't know what Li Qingyi was trying to do, but she was undoubtedly a loving mother when facing Li Qingyi.

Since Li Qingyi wanted to make the little girl named Wang Xuan famous, um... to be more precise, the soap made by Wang Xuan became famous, and the Queen happened to be holding a banquet. With the Queen's rich experience, after a little operation, soon all the upper-middle-class nobles in the capital knew about the existence of the soap.

Because the queen only had eight soaps, and she kept six for herself, and gave two soaps with osmanthus and chrysanthemum patterns to the young man and girl who won the first prize at the flower banquet, it was hard for everyone not to pay attention to this.

Wang Xuan: Great!

Scarcity makes things valuable. Wang Xuan made only a little more the second time than the first time, and soon had sixteen pieces delivered to the palace. In addition, she gave six pieces to Li Zhu in the Princess's Mansion. Wang Xuan secretly hid the rest and waited for the right opportunity.

And how Wang Xuan marketed and hyped herself afterwards, how she got in touch with the eldest princess, a mascot who had status and position but would not interfere in state affairs, how she opened a store and how she made money... none of this was within Li Qingyi's focus.

She just needs to make sure the students don't get into trouble.

Li Qingyi: Although I am their counselor, no matter in the previous life or this life, I will be hated if I interfere too much with students' freedom!

Time passed quickly, and Li Qingyi finally received a reply from the system, and the prince also returned to Beijing.

Li Qingyi: ...

This is difficult to comment on.

System: [Host, host, the reply from over there has arrived. ]

Li Qingyi: [How do you say that? ]

System: [Hmm, shall I read it to you again? ]

Li Qingyi: [Yes.]

The system muttered: [In fact, if the host is willing to spend merit, I can also project it directly to you, but that requires extra energy. If you don't want to, forget it. ]

Having said this, the system immediately began to read the reply letter in a methodical manner.

Li Qingyi leaned his head and looked out the window, seemingly in a daze, but in fact he was listening carefully to the voice of the system.

After a while, the system finished reading, and Li Qingyi also understood the three key points of this reply letter.

First, merit is exchanged for energy as currency. This is the basic rule of the currency system of the entire space-time bureau and cannot be changed.

Second, the Space-Time Bureau apologized for Li Qingyi's current situation, and stated that their Space-Time Bureau and the systems produced by the Space-Time Bureau are formal systems, generally with official guarantees. Normally, each system will come with a prop mall, but because Li Qingyi is not a formal member of the Space-Time Bureau, he will get the system based on accidental compensation, so he does not have this benefit.

Third, through discussions in meetings, they recognized Li Qingyi’s values ​​and were able to appropriately lower the prices of goods that Li Qingyi believed were unequal in value. At the same time, they approved Li Qingyi’s personal suggestion - putting the formula on the shelves.

They will restrict the recipes though.

For example, the recipe mall will sell lost ancient recipes as well as recipes of the same technological level within two hundred years from the same era in billions of parallel worlds, such as textile machines, jacquard machines, etc.

But the recipe store will never contain any methods of making atomic bombs, tanks, etc.

In this regard, Li Qingyi raised a new question: [With the same technical level...what about the formulas of cement, glass, etc.? ]

The system flipped through the pages and said, "I have already loaded the corresponding plug-in. The data is still being updated. However, the glass formula you want is already available. However, please note in the details that this is an improved jade-like formula."

Li Qingyi is confused: [Imitation jade? ]

System: [He wrote this. ]

Please forgive Li Qingyi, she is just an amateur history enthusiast, and her interest is more in the humanities, so she is really not familiar with this area.

But Li Qingyi inexplicably felt that Wang Xuan might know something.

So, Li Qingyi left the palace again the next day.

Queen: "..."

My daughter is becoming more and more lively.

Also good.

"Glass." When Wang Xuan heard Li Qingyi asking about the relationship between glass and imitation jade, she paused and thought, "Teacher, if you hadn't mentioned it, I would have almost forgotten it."

As she spoke, Wang Xuan looked at Li Qingyi with a smile: "Teacher, tell me, why is there so little glass in our ancient Chinese buildings? Did our ancestors dislike it?"

Li Qingyi was speechless: "Just say it if you have something to say."

Wang Xuan: "Okay, okay, actually many people think that glass is a new thing that has only appeared in my country in modern times, but in fact it has already appeared in history, for example, imitation jade glass."

"As early as the Spring and Autumn Period, people were already able to make glass."

Wang Xuan gave Li Qingyi a popular science class on glass technology.

"Silicon dioxide, the raw material for making glass, is actually quite easy to find. It is the main component of quartzite and most sands, and occupies one eighth of the entire earth's crust..."

"...Actually, the main technical difficulty lies in the melting point, because this thing needs 1700 degrees to melt, so in order to reduce the difficulty, we have to add flux..."

"…the best flux for glass is soda ash, but there is not a large amount of soda ash that is easy to mine in China…"

Wang Xuan was talking excitedly, and she pulled out a piece of paper to show it to Li Qingyi. Finally, she said, "The best evidence is the Sword of Goujian, King of Yue. The blue inlaid on the front is glass, but the biggest disadvantage of glass at that time... was that it was useless."

"No one will delve into this useless stuff."

"Anyway, our confused ancestors found a way out of glass and started making imitation jade, well, you could also call it ancient fake jade."

Wang Xuan touched his chin and smacked his lips: "Actually, I know how to make glass, but the problem is that I don't know how to make soda ash."

"In other words, I know that the byproduct of making soda ash can be used as fertilizer, but I don't know how to extract it. But teacher, you reminded me. Although I don't know how to extract soda ash, I know where to get some soda ash in China. Although the amount is not large, it can still be used to make a batch of high-end glass products."

Wang Xuan clapped her hands: "Okay, it's decided!"

Li Qingyi remained silent.

Wang Xuan talked a lot with great interest, but got no response. She turned around in confusion and saw Li Qingyi staring at her thoughtfully.

Wang Xuan: “Teacher?”

Li Qingyi stroked his chin and said, "You know so much."

Before, Wang Xuan said that she had a lot of weird things in her mind, but she didn’t take it seriously. But now, looking at it...ah, could it be that her step of asking the system to change the formula was actually redundant?

but……

Li Qingyi: "Soda ash..."

Wang Xuan expectedly: "Teacher, do you know how to do it?"

Li Qingyi blinked and shook his head: "No, I don't know how to do it. I gave my chemistry knowledge back to my teacher eight hundred years ago. At most, I still remember a little bit about how to extract salt... Hmm?"

The two looked at each other.

Wait, when was solar salting technology invented?