After the marriage was severed, I fled with my golden finger to protect my mother

Chapter 206: Turning Trash into Treasures

Seeing the normally arrogant Crown Prince looking so stunned, Yuxiu couldn't help but laugh.

"Your Highness, do you have any instructions?"

With just this little noise, someone outside asked, and Qi Siyuan came to his senses and replied casually.

"Nothing, everyone, please move away and don't disturb me while I'm reading."

"Yes……"

The person outside responded, and then Yuxiu heard a series of footsteps slowly leaving the door and heading out of the yard.

"I don't know what this is? Why is it like this..."

Qi Siyuan raised his hand and looked under the candlelight, only to see that his palm was covered with a layer of fine black powder, which he had never seen before.

Yes, as the honorable Crown Prince, he naturally doesn’t know these things.

Even if he knew coal, he probably knew it came in large chunks. As for the powder, he probably wouldn't have thought of it.

"This is a good thing, please take a look, Your Highness."

Yuxiu brought out the coal stove as she spoke, then followed the steps to put in some fire starters and honeycomb coal, and then lit the fire with a fire starter.

She did all this by the half-open window. As the smoke slowly rose, Yuxiu fanned it with her hands. When the flames shot up, she picked up the brass kettle in the house and put it on top.

"This thing is called honeycomb coal. It is made of waste coal ash and yellow mud. It has a good burning effect. Not only is the fire very strong, but it also burns for a long time. It is a must-have item at home."

As they were talking, the honeycomb coal had already started burning. The little bit of green smoke from before had all dissipated, and as the flames licked it, a "gurgling" sound soon came out of the kettle.

"How can this thing boil water so quickly?"

Qi Siyuan was very surprised. This thing called honeycomb coal looked a little black, but it was indeed as Miss Xu said, with very strong fire power.

It looks very convenient. If people had one like this at home, wouldn’t cooking become simple and trouble-free?

"But there is a fatal disadvantage to using this thing. That is, you cannot close the doors and windows when using it. Otherwise, the smoke from the burning coal is poisonous and can kill people directly."

Seeing that Qi Siyuan seemed very interested, Yuxiu quickly told him the shortcomings of this thing.

As for the others, Yuxiu was afraid that they wouldn't understand, so she just told them directly that it was poisonous.

"In fact, whether it is honeycomb coal or large pieces of coal, they must be ventilated when used, otherwise they will end up in the same way."

Yuxiu just wanted to say these words in advance to avoid serious consequences for others, but Qi Siyuan looked thoughtful after hearing them, as if he was thinking of other things.

Yuxiu didn't ask any further questions and told him the method of making and the uses of honeycomb briquettes.

Qi Siyuan then realized that this thing was made of coal, no wonder his hands were black when he touched it.

"Yellow mud and waste coal ash? Doesn't that mean that these things can be turned into treasures, and are good things that can bring huge profits?"

Yellow mud is worthless and can be found everywhere in the mountains. The discarded slag from coal mining is usually thrown away. It doesn't cost any money, you just need to hire someone to make it, and the labor cost is not worth anything.

Qi Siyuan pondered secretly for a while before looking at Yuxiu and asking:

"Miss Xu sent such a good thing, I wonder what the conditions are?"

It's impossible that they don't want anything and just want to give themselves this big gift, right?

"The matter of the old lady in Prince Ning's Mansion has been settled. It is estimated that the family will arrive in the capital in a few days."

Hearing that the family had returned, Yuxiu was very happy, so she did not hide anything and directly stated her request.

"I can provide you with the recipe for honeycomb coal unconditionally, and I can also provide you with a drawing and sample of the coal briquette machine, but I want to find someone to produce the coal stove in my family."

She took out her customized coal briquette machine from the bamboo basket and handed it over with a piece of paper, which detailed the production process of honeycomb coal and the drawings of the coal briquette machine.

"We will split up and sell coal briquettes and coal stoves together. I believe many people will buy them."

Qi Siyuan looked at the so-called coal stove and it didn't seem to require any technical skills. Since someone wanted to make it, he let her do it.

He agreed without thinking, and seeing the woman opposite smiling with her eyebrows curved, he couldn't help but curl the corners of his mouth.

At this moment, the water in the brass kettle was almost boiled dry. Yuxiu bent down, picked up the lid on one side and covered the air vent.

"Cover it now, and the fire will slowly get smaller, but it won't go out easily. If the charcoal fire is not completely burned out, open the lid tomorrow morning and the fire will start again."

Yuxiu took the lid and demonstrated to him. Qi Siyuan saw the flame getting bigger and smaller, and soon understood the mystery.

"Anyway, you only need to remember one thing: never close the window when using it, and make sure to ensure ventilation."

Qi Siyuan nodded honestly, indicating that he really remembered it. Besides, it was also written very clearly on the piece of paper she just took out.

There were about ten pieces of honeycomb coal in the backpack that Yuxiu brought. Yuxiu gave them to him as samples.

The task was completed smoothly, and Yuxiu prepared to leave. She also wanted to see if the old princess had rested, so that she could discuss the next matters with her.

"Wait a moment for that."

Perhaps because he was afraid that Yuxiu would suddenly disappear like she did last time, Qi Siyuan quickly called out to her.

"The recipe for building a kang in your family is very good. We have sent many people to investigate in the past two days. It has greatly solved this winter's major problem. The court has also been arguing about this matter in the past few days. Maybe there will be a reward for your father in the future. You should be prepared..."

Regardless of the considerations, Lord Yao, the Jingzhao Yin, wrote very clearly in his report that the recipe for the kang was voluntarily submitted to the court by Xu Qinghe, and the emperor was very happy at the time, but no effect was seen at that time, so no reward was given.

Now this achievement has been set in stone. Not only Xu Qinghe who submitted the prescription, but also Lord Jingzhao Yin Yao and his entourage have all made contributions. There is no suspense in terms of rewards.

"Thank you very much for informing me in advance, Your Highness. My father will be very happy when he knows it."

Yuxiu was happy. In this ancient time when the emperor was revered, being rewarded by the emperor was already a great honor.

Especially in the capital city where many bigwigs gather, to get a few words of praise from the emperor, even if nothing is awarded, is enough to make people look at you with respect.

Even if Yuxiu didn't care about this, Xu Qinghe and Cui were both native ancient people, so naturally they couldn't avoid this custom.