Datang: I was exposed by Princess Changle

When this question was mentioned, Li Shimin's ears perked up, wanting to understand.

In fact, he was also puzzled.

What kind of magical operation did Lin Xuan use to make such a behemoth move?

"Hehe, this is a core secret."

Lin Xuan said calmly and unfathomably, with a mysterious look on his face.

"You can understand it as the highest state of science, after all, this can only be understood and cannot be expressed in words."

"Even if I tell you how to do it, you still can't understand, so you should stop asking."

"In fact, scientific research is the same as cultivating immortals. You cannot fully understand its core principles. It is already very good to be able to use some technological products flexibly."

"The first thing you have to do is not to get to the bottom of it and find out its principle, but to learn it and use it proficiently, understand?"

Lin Xuan explained calmly.

Science and metaphysics are sometimes quite similar.

Just like a mobile phone, everyone can use it, but how is it made?

How does it work?

How many people can tell?

Including computers, TVs, headphones, etc...

All these inventions have been created, and they are all incomprehensible to ordinary people, but they do not prevent ordinary people from using them.

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Chapter 308 A Brainstorm!

The voice just fell.

Li Jing said with an apologetic face upon hearing the words: "Yes, I understand. This general is talking too much, so I shouldn't ask more."

A group of Tang generals were also thoughtful when they heard the words, but they stopped asking.

Including Li Shimin, he was the one who knew the most about Lin Xuan among these people, but he didn't ask any more questions, and even let himself stop thinking about it.

Because it doesn't make sense to him to explore.

Besides, as an emperor, he doesn't need to understand everything, as long as he can control the overall situation, other things are not important to him.

An hour later, Li Shimin led the [-] army of joy and excitement, and set off on a steam train!

-

Royal Villa Furong Garden.

Lin Xuan brought a group of maids and servants from the Lin family to serve him here to escape the summer heat.

Near noon, the air in Furong Garden has become hot.

In the era of the Tang Dynasty, there were no cool short sleeves to wear, and it made people feel very hot!

"Son!"

"Your Majesty is too stingy!"

"Why don't you prepare more ice cubes for our Furong Garden!?"

"The weather is so hot now, you must be sick from the heat, my lord!"

A maid of the Lin Mansion shook her fan vigorously for Lin Xuan, and said to Lin Xuan with a complaining face.

Lin Xuan was concentrating on reading the book, and after hearing what the maid said, he subconsciously wiped the sweat off his brow with a handkerchief, and suddenly remembered that there is no iced drink in the current Tang Dynasty!

The gauze clothes made in the summer of the Tang Dynasty are relatively light and thin, but when worn layer by layer, it still makes people feel extremely hot in summer!

Moreover, in ancient times, the etiquette was strict, unlike in modern times, men can take off their shirts when they are hot, and women can only wear a vest!

At this time in the Tang Dynasty, if a man was shirtless, he was called a hooligan.

Women are even more strict in this regard, even if the skirt they wear cannot cover their feet, it is still an unseemly thing!

It can be said that regardless of spring, summer, autumn and winter, women have to cover their bodies tightly all year round. Except for hands and faces, there should be no exposed skin!

In this way, it is okay to say in winter.

But in the summer, the women will feel uncomfortable. It is normal to have prickly heat covered by layers of clothes!

However, the wisdom of the ancients should not be underestimated!

Although they can't take off their clothes, they can also solve the problem of heat from external factors!

For example: ice!

In winter, they cut out square blocks of ice from the river, put them in the ice cellar and store them with unique technology. In the coming summer, they will take them out to relieve the heat!

It's just that this way of relieving heat can only be enjoyed by high-ranking officials and nobles. Ordinary people don't even care about eating and drinking, so how can they still have the mind to solve the problem of relieving heat?

In addition, storing ice cubes in winter and reusing them in the next summer will not be able to preserve them for such a long time with general storage techniques, and they will slowly melt over time, leaving only a small amount of ice cubes preserved. a part of!

This also caused the ancient ice cubes, which are simply priceless in summer!

Ordinary wealthy households simply cannot buy ice cubes to relieve the heat!

As a result, no one would think of using expensive ice to make cold drinks!

This phenomenon has been the case from the period of Zhou Tianzi to the end of Tang Dynasty!

Until the end of the Tang Dynasty, when the alchemist was producing gunpowder, he mined saltpeter and found that after the saltpeter was dissolved in water, the temperature of the water would drop rapidly, and ice cubes would be formed after cooling!

As a result, saltpeter ice making has entered people's field of vision.

Ice is no longer a rare thing, and the common people also invent various cold drinks made of ice in summer!

But now is the early Tang Dynasty, although ice is not such a rare thing for the royal family.

But now no one thinks of using ice to make cold drinks.

They just put ice cubes in a closed room and use it to lower the temperature inside the room to cool off the heat!

"Yes!" Lin Xuan had an idea, and immediately had an idea!