I am the cook, but I am Li Er's son-in-law

It was still the movement in the garden.

It's just that today's movement was a bit unusual. After the sound, there was another snap, and a green light exploded above the sky, spreading out like flower petals.

But its lifespan is shorter than that of Epiphyllum, and it disappears in a blink of an eye.

Li Shimin and Empress Changsun paused, staring at the night sky dotted with stars, a little dazed, and the fleeting beauty they caught inadvertently surprised their eyes.

That is fireworks?
My two daughters have already researched something?
Li Shimin quickened his pace and rushed to the garden. The officials and maids put out the fire in a panic. Li Lizhi and Li Shu's faces were blackened.

But at this moment, they all looked at the sky with silly smiles.

The sense of achievement turned into a mass of warm feeling, surging back and forth in their bodies, making their blood boil—such a beautiful thing was made by their own hands.

"The fireworks were successful?" Li Shimin came and asked impatiently.

The two little girls nodded.

Li Shu knew her father's thoughts best, so she spoke out about the slow-burning lead. The method was very simple. Even Li Shimin, who had never been able to understand what her two daughters said, quickly figured out what happened. thing.

The two of them calculated the data again, and adjusted the ratio of gunpowder and fuse.

With the last experience.

This time, the fireworks were not set off in the garden, but in the palace corridor.

The eunuch ignited the fuse, and there was a chirping sound, sparks came out, and after a while, there was a bang, and everyone raised their heads and looked at the sky.

There was a snap.

The green flowers spread out in the sky, just now, Li Shimin just caught a glimpse of them inadvertently, and when he wanted to see them, the fireworks had all withered.

After watching the whole process, the shock became even more turbulent.

It was as if the sea of ​​stars collapsed at this moment, and the stars fell from the sky.

The next day, Qingming.

For people in the Tang Dynasty, Qingming is just a day for outings rather than worshiping immortals, and even Li Shimin is no exception, but his status as emperor is here, and he can't be as indulgent as ordinary people on this day.

He has to go out for an outing in a proper manner.

Li Lizhi and Li Shu did not follow behind their father, they were much more free than Li Shimin, and they could go for a walk whenever they wanted.

After finally researching the fireworks, of course it is to show off with Brother Zhengyang.

Looking at the bamboo tubes placed on the table, some thin paper was simply pasted on them to seal them to prevent the projectiles inside from falling out.

"Has it succeeded?" Yin Xuan touched his chin and asked.

Li Lizhi and Li Shu nodded happily.

They are so proud.

"However, only some copper powder has been added so far, and it can only emit green light." Li Lizhi picked up a bamboo tube and played with it in his hand. "It would be great if we could add a little red."

She has an inexplicable obsession with red and green.

"It doesn't look good during the day." Li Shu paused for a moment, then glanced at the maid behind her, "Tonight, my sister and I will stay at brother Zhengyang's house. Let's show you the fireworks at night?"

Last night, Li Lizhi raised Li Shu's request to Li Shimin.

Thinking about the love of fireworks, Li Shimin thought for a while, discussed it with Empress Changsun, and finally agreed.

Anyway, there is a maid.

Yin Xuan seems to be an honest person again, he is not very close to women, and he has never heard of going to Pingkangfang, so there shouldn't be any problems.
Of course, all this depends on Yin Xuan. If Yin Xuan refuses to agree, they can only return to the palace obediently.

"Of course it's fine." Yin Xuan responded with a full mouth. Yin Lulu had always hoped that these two beautiful sisters could stay at home for a while.

Li Lizhi and Li Shu looked at each other, clenched their fists, and the goal was achieved!

Yin Xuan picked up a bamboo tube, played with it in his hand, and asked, "After you made this thing, have you thought about what to do in the future?"

How to do?
The two of them were taken aback for a moment, not quite understanding Yin Xuan's meaning.

"Fireworks are fireworks, what else can I do?" Li Lizhi tilted her head and looked at Yin Xuan.

Yin Xuan tapped on the table lightly, fiddled with the fuse: "I mean, have you ever thought about selling fireworks?"

Trafficking?

"Brother Zhengyang wants to do business?" Li Shu asked hesitantly.

Yin Xuan nodded.

The two little girls frowned and began to think.

"Can this thing be sold?" Li Shu pinched her fingers and calculated. The cost of fireworks is not low. Not to mention the money spent on research, just to make such a bamboo tube, it takes More than 100 texts.

Fireworks are good-looking.

It can cost more than 100 Wen, but for the beauty of that moment, I am afraid that no one is willing to pay except for a very small number of nobles.

Yin Xuan knocked on the table and gave Li Shu a meaningful look: "Let's take this as an additional question, how to save costs and make fireworks at an acceptable price"

"Don't you guys find this challenging?"

Another topic.
The two little girls' hearts tightened, but they still agreed a little bit. They tasted the sense of accomplishment when making fireworks, and they were a little addicted to this kind of thing.

Isn't it just a topic!
They have already researched the fireworks, so why are they afraid that they will not succeed in this topic?
It's just cost saving. At this moment, several ideas have already emerged in their minds.

However, compared to this seemingly unchallenging topic for them, they recalled what Yin Xuan said a few days ago.

"Brother Zhengyang, didn't you say that we have made fireworks, and there are other interesting things to teach us?" Li Lizhi put down the fireworks in her hand and looked at Yin Xuan eagerly.

Yin Xuan raised his eyebrows, a little surprised.

If Li Shu said this, it would be excusable, after all, Li Shu is a good child who loves to study.

But when these words came out of Li Lizhi's mouth, it was a bit abnormal.

"Why do you love studying so much?" Yin Xuan asked in surprise, "I wanted you to study before, but it was more difficult than preventing Lulu from fighting with chickens."

Li Lizhi snorted and pinched her waist: "I am a person who loves to learn!"

Li Shu pursed her lips and snickered: "Father saw that we were successful in research, so he added some money to us a month and gave us some gadgets."

"My sister is thinking about these things, and wants to make some more results, so that I can get some from my father."

Before she could finish her words, Li Lizhi rushed over with all her teeth and claws, and blocked Li Shu's mouth.