The two piles of ice in front of them were much more than they had brought with them.

And listening to the meaning of Shi'er, in order to store ice cubes, the Rumored King's Mansion even dug an ice cave.

He swallowed quietly and said slowly, "Where is the ice cave?" Take me to see how much stock you still have. ”

A moment later.

Li Shimin and Empress Changsun looked at the full ice cave in amazement, the ice cave with a radius of about two zhang, and the cold was pressing.

Ice cubes here.

It's more than in the palace!

Wrong!

All the ice cubes in the world will be transported to the imperial city in the summer.

Even if there are ice cubes in the minister's house, they are all rewarded by Li Shimin, and the amount is very small.

But now, Qin Shou actually dug an ice cave in the palace, and the stock is more than several times more than the ice in the palace.

What's going on?

Empress Eldest Sun and Li Shimin rubbed their eyes.

"Father, queen mother, do you think two cars are enough?"

Qin Shou spoke softly, "If it's not enough, I'll get some more." ”

"Originally, I wanted to surprise my father today, but I didn't expect to be discovered by my father in advance."

Qin Shou smiled shyly and scratched his head.

Li Shimin's eyelids jumped, and his heart roared.

I found a mallet and found it.

I'm here to show off my wealth to you, not to show you off my wealth.

He was thinking about this hot day and sent some ice cubes to Qin Shou to relieve the heat.

It's a little bit of heart as a father, and I guess the rumor will be happy.

What a deal!

Now after seeing Qin Shou's ice cave, Li Shimin's face tugged lightly.

Isn't this as embarrassing as winning a jinshi to show off to others, and others get a top score?

But Li Shimin thought about the pitiful little ice cube in the palace.

I was still complacent, but suddenly I felt a little hot on my face.

Well, it seems that it's not bad to use this excuse, and by the way, you can ask for some ice cubes back.

Thinking like this, Li Shimin coughed lightly twice, and said with a straight face: "You kid, you have such good things, and you don't know if you think about me, you have to be cheeky to ask you." ”

As soon as these words came out, not only Fang Yaoyi was stunned.

Even Empress Changsun was a little speechless for a while.

Li Shimin said cheekily: "But in view of the fact that you kid is hiding from me, I feel that two cars are not enough, at least three cars." ”

"No, four carts of ice."

Qin Shou didn't care, anyway, there was a lot of ice that was originally made, and four cars of ice cubes were nothing.

The key is to fool my father to mine the saltpeter mountain in his hands!

Right now, my father has already taken the bait.

Thinking like this, the corners of Qin Shou's mouth hooked up a smile.

Seeing Qin Shou's smile, Li Shimin shivered for no reason, and hurriedly said: "This ice cube is a punishment for you, and you can't ask me for silver." ”

Qin Shou: "......"

"Four carts of ice cubes are not a problem."

Qin Shou said.

He raised his head to look at Li Shimin and said slowly: "But four carts of ice cubes shouldn't last too long." ”

There are many palaces in the imperial city, and the consumption is naturally not comparable to the palace.

So even if there are four more truckloads of ice, it won't last long.

Li Shimin nodded.

Although he had vaguely guessed that there was a pit dug by Qin Shou in front of him, he had to move forward at this time.

Sure enough, Qin Shou showed a smug smile and said, "It's better to teach people and fish than to teach people and fish." ”

"Erchen just has a way to get ice cubes here, I wonder if my father wants it?"

Li Shimin sighed helplessly.

Sure enough, this kid is waiting for him here.

Come to think of it, with the temperament of this kid iron rooster, how could he buy expensive ice cubes, I think it is to master other channels to get cheap ice cubes.

However, this child is really a little scary, even he, the son of the Tang Dynasty, can't buy cheap ice cubes, this kid actually has such a way.

Thinking like this, Li Shimin reluctantly said: "Say, how much does you want for this kid?" ”

After all, this kid is not still in it for money.

Who knows, Qin Shou shook his head with a smile and said, "Erchen doesn't need money. ”

"In other words, if the son tells his father about this method, his father doesn't need to spend too much silver."

Li Shimin frowned slightly and said, "What does this mean?" ”

Seeing that Li Shimin had become curious, Qin Shou no longer sold Guan Zi, and said: "Actually, it's very simple, didn't Erchen buy three mountains in a big way before? ”

"Do you remember your father?"

Of course, Li Shimin remembered that not only that, but he also tried his best to buy another mountain that Qin Shou wanted to buy.

It's just that Qin Shou has not moved since he bought the mountain, so Li Shimin has put the matter of the mountain on hold.

In recent days, because of all kinds of trivial matters, he ignored Qin Shou's actions for a while, so he didn't know the news of Qin Shou's opening of the mountain.

Li Shimin nodded and said, "Naturally remember, could it be that you got this ice cube from that mountain?" ”

But soon, Li Shimin put this idea behind him.

Just kidding, that mountain is an ordinary barren mountain, not to mention ice cubes, even the stream is pitiful, how can it produce ice cubes.

However, Qin Shou nodded and explained, "Don't hide it from my father, these ice cubes do come from these mountains. ”

"What?" Li Shimin's eyes widened, and his face was full of shock.

Qin Shou said: "These four mountains were all selected by Erchen after careful consideration, and these mountains are rich in a stone called saltpeter. ”

"This stone can be used to make ice cubes."

Li Shimin swallowed his saliva and said in surprise: "What you said is true? Can stones also be used to make ice? ”

"What's the charter?"

Empress Eldest Sun also listened with an expectant look on her face.

The eyes are full of pampering eyes.

It seems that he is proud of himself as a child who can do anything.

This child was obviously only born in a market family, but he brought them surprises again and again.

The corners of the eldest grandson's mouth hooked up a soft smile.

In reverie.

Qin Shou took out some saltpeter powder and asked his subordinates to bring a basin of water.

He said to Empress Changsun and Li Shimin: "Father, queen mother, take a closer look. ”

"Then it's time to witness the miracle!"

After that, Qin Shou poured saltpeter powder into the water.

Li Shimin and the others stared at the water in the basin, but Qing Shui did not respond.

Li Shimin frowned, and said suspiciously: "Didn't you fail?" ”

Qin Shou smiled and shook his head and said, "Father and Emperor wait patiently for a while." ”

The voice fell.

Empress Changsun, who had been staring at Qing Shui, was suddenly surprised: "Hey, something has changed." ”

I saw that white gas gradually rose from the wooden basin, making a hissing sound.

Li Shimin's eyes widened and he looked at the wooden basin with white smoke lingering, "What's the situation?" ”

Empress Eldest Sun was full of surprise at the moment, pointed to Qing Shui, and said, "The water is frozen!" ”

"It's really frozen!"

Condensation freezes.

In fact, the principle is very simple, on the stage of later generations, most of those white smoke effects are made of saltpeter powder.