Only then did Liu Shan lead people to retreat.

And Li Su invited the two to sit down, and then her own little girl held fragrant tea.

Several people gossiped, Li Chunfeng and Yuan Tiangang, but they didn't dare to get to the point.

It's very simple, when they saw Li Su just now, both of them were shocked.

This King Liang is clearly not like the people of this era, but he appears here.

Therefore, Li Chunfeng blurted out that His Royal Highness King Liang is not a human being.

And because of this sentence, Li Chun risked being broken his leg.

And now, the two of them have great doubts in their hearts, but they don't know how to ask.

And Li Su was too lazy to play dumb riddles with the two, so he couldn't help asking: "I don't know why the two of you came?" ”

After Yuan Tiangang pondered for a while, he couldn't help asking, "Your Highness, how can people change their lives against the sky?" ”

Li Su couldn't help but laugh and said, "Don't you know the truth that man will conquer the sky? ”

Rumble!

Li Su's words sounded like a thunderbolt in the hearts of Yuan Tiangang and Li Chunfeng.

You must know that in ancient times, there was a sense of reverence for heaven and earth.

Whenever something big happens, we must respect the heavens.

Even the emperor is called the Son of Heaven, but the Son of Heaven.

It can be seen that the ancients were in awe of heaven.

And now?

King Liang actually said wildly, man will win the sky!

If this sentence is spread, it will surely cause an uproar.

Of course, in fact, why didn't Li Su know this truth?

However, he firmly believes that these two people will never spread this sentence.

Because, Yuan Tiangang clearly calculated that Wu Zetian would be the future empress.

But he was still tight-lipped, only said some ambiguous words, and did not directly betray Wu Zetian.

Li Su believes that Yuan Tiangang and Li Chunfeng will definitely not spread this sentence.

And whether you can subdue these two people next, this sentence is actually an introduction.

Li Chunfeng couldn't help but gasp, and couldn't help but say: "Your Highness, everything in this world is conceived by heaven and earth, the sky is above, and the way of heaven is vast. Compared with heaven and earth, man is too small, how dare he say that man will conquer heaven? ”

Li Su smiled slightly, and couldn't help asking: "Then do you know that the earth we live in is actually a sphere?" ”

The ancients had always believed that the heavens were round and the earth was round, and Copernicus in the West published the heliocentric theory, and as a result, he was burned alive.

Li Su believed that as soon as this theory was thrown out, it would inevitably cause the shock of Yuan Tiangang and Li Chunfeng.

Unexpectedly, I saw Yuan Tiangang nodding and said, "Yes, I didn't expect His Highness to know this?" ”

Well?

What the?

Yuan Tiangang and Li Chunfeng actually know that the earth is a globular star?

However, considering that these two people made calendars and observed solar and lunar eclipses, both were astronomers.

With that in mind, it's normal for them to know that the Earth is a sphere.

Li Su continued: "Then do you know that the stars we see at night are actually a behemoth, no smaller than the planet we live on? Have you ever thought that one day, we will be able to fly on a machine that can go to any planet? ”

This time, Yuan Tiangang and Li Chunfeng were really shocked, and they couldn't help but gasp at the same time.

In fact, when observing the starry sky, they also had this kind of guess in their hearts.

Maybe the stars in the sky look very small, but they are actually very large.

However, they did not have any evidence to prove it, and they never imagined that they would one day be able to land on these planets.

Li Su continued: "In fact, the so-called sky is just some atmospheres composed of atmosphere. Passing through this layer of atmosphere, you can reach the starry sky. In the starry sky, there is no air, people will float in the starry sky, and in the starry sky, there is no up, down, left, right, and direction. ”

This time, Li Chunfeng and Yuan Tiangang both showed blank expressions on their faces.

The two looked at each other, and both saw shock in each other's eyes.

Although they couldn't understand what King Liang said, they still felt very powerful.

Of course, Li Yu knew that they didn't understand, and he didn't expect them to understand, but it was enough to plant a seed in their hearts.

Li Su then asked: "This king knows that the two of you are proficient in the stars and have profound Taoism, so this king asks you, can you turn water into ice and make fire with ice?" ”

What the?

Condensate water into ice, and make fire out of ice?

It's just that this condensation is ice, and this use of ice to make fire is too ridiculous.

In fact, even if the water is condensed into ice, they can only do it in winter.

Well, well, almost anyone can do it.

Yuan Tiangang and Li Chunfeng couldn't help but collectively shake their heads.

Li Su smiled slightly and said, "But, this king can!" ”

Facing King Liang, who is not very reasonable and will break other people's legs at every turn.

Although Yuan Tiangang and Li Chunfeng didn't believe it in their hearts, they didn't dare to show their doubts, you said yes, that's can.

Li Su saw the doubts on their faces, and couldn't help but smile and said, "If this king doesn't show it, you will naturally not be convinced." Well, next, this king will show you the Tao of condensing water into ice and using ice to make fire! ”

After that, Li Su ordered someone to take half a basin of water, and at the same time took some powder milled from saltpeter ore.

In front of Yuan Tiangang and Li Chunfeng, Li Su directly poured saltpeter powder into the basin.

After the saltpeter powder comes into contact with the water, the saltpeter cools down quickly and absorbs a large amount of heat.

The water in the basin, as the temperature plummeted, had fallen below freezing.

So, the water in the basin begins to freeze quickly.

In a short time, half a basin of water solidifies into ice.

Seeing this scene, Yuan Tiangang and Li Chunfeng couldn't help but be dumbfounded.

Of course, they could see that this was not a Taoist technique at all, but the effect of those powders.

But there is such a miraculous powder in this world, which is beyond the scope of their cognition.

And next, what Li Su wants to perform is to make fire with ice.

Li Su took out a piece of ice from the ice cube in the basin, and then polished it with rubbing and other objects, and it didn't take long to polish it into a strange shape.

Of course, if you are a modern person, you will be able to recognize that this is actually the shape of a convex lens.

Next, Li Su led Yuan Tiangang and Li Chunfeng to the outside of the house.

A blank sheet of paper was placed on the ground, and a convex lens made of ice was placed on top of the white paper.

After sunlight passes through the convex lens, the convex lens refracts the light and condenses it into a single point.

Li Su adjusted his position several times, and soon the light appeared on the white paper.

After a short while, the white paper around the light point began to zoom, and the color gradually deepened and turned black.

Then there was green smoke, and after a while, there was a flash of fire.