Lightweight, warm, and comfortable to wear.

And for the best effect, Li Yuanjia asked people to make the cotton clothes very thick, plus there were so many coal stoves in this "imperial study", and after a while, Li Shimin's head began to sweat.

And after feeling the lightness of the cotton clothes, the emperor hesitated for a moment and asked, "Is it really kapok stuffed here?" ”

Today's incident is simply subverting his common sense.

Kapok is the kind of white, clumpy thing, in addition to looking more special, can be placed in the garden for ornamentation, can also be made into clothes? And the clothes are still so light and warm?

Li Yuanjia was naturally not surprised by this, and respectfully asked him to take off his clothes, and after changing into the original fur fur, he tore the cuffs of the cotton coat vigorously: "Second brother, look, is this kapok?" ”

This opening was specially left by Li Yuanjia for the tailor, and it was torn open.

After looking at it, Li Shimin suddenly exclaimed: "Sure enough, it's kapok, it's just like this......"

Without waiting for the emperor to ask, Li Yuanjia hurriedly replied: "Remove the seeds from the kapok, and beat them fluffy with a bowstring, making them softer and warmer." Everyone thinks that kapok is just a superficial appearance, and it has no other use except for being good-looking, but they don't know that they don't understand......"

"Huh?"

"Ahem! Ahem! ”

Seeing that the emperor's eyes instantly became unkind, Li Yuanjia's heart suddenly suddenly, and he immediately knew that he had said the wrong thing, and hurriedly added: "The younger brother also found the relevant records from a book called "Tianzhu Travels", and only then did he know that kapok could be used to make cotton clothes......

""Tianzhu Travels"? That's what you learned...... That kind of digital book? ”

"Yes, Your Majesty."

Hearing this, he smiled slightly, Li Yuanjia nodded quietly: "It records a lot of Tianzhu people's whimsical ideas, which really inspired me a lot. There were also books from the Western Regions that also recorded the use of kapok, so I spent a few years collecting them and asking the tailors at home to figure out how to use them......"

Saying these words, Li Yuanjia secretly breathed a sigh of relief in his heart.

In the past few years, he has spent so much effort to "write" so many books, isn't it just for this day?

Whether it is "Tianzhu Travels" or "Travels to the Western Regions", including those ancient and strange Roman travelogues, etc., they record a lot of historical features, myths and legends, and customs of various countries in Li Yuanjia's memory, which are mixed with countless ridiculous things that make future modern people feel gimmicked after reading them, but they also record a lot of useful things.

For example, Arabic numerals...... No, it should be called Tianzhu number now, and cotton is naturally no exception.

In fact, if someone goes to Han Wang's study, he will find more surprising things, such as crops alone, there are potatoes that yield thousands of catties per mu, corn that can be highly produced in arid places, and chili peppers that taste spicy but delicious......

It's just that the source of the book is no longer verifiable, and no one has ever heard of the author.

However, just when Li Yuanjia was smug about his precautions, the emperor smiled lightly and suddenly asked, "What about movable type printing?" Which book did you read it from? Tianzhu? Or Persia? Or is it a country further west? ”

"Huh? Movable type printing? ”

After hearing this word from Li Shimin's mouth, Li Yuanjia's heart suddenly froze, but his face showed surprise: "Second brother, do you also know that I am doing movable type over there?" But it wasn't really something I read from a book, but something that suddenly occurred to me one day when I was using a seal...... Really, I'll show you how! ”

As if he was afraid that the emperor would not believe it, Li Yuanjia confessed, took out the seal of King Han that he carried with him from his body, and explained it to Li Shimin: "Look at this, if there is only one word on a seal, if we engrave a seal for each word, just arrange them in the order of the book, brush them with ink, and cover them with paper......

Patiently and meticulously, Li Yuanjia explained the concept of movable type printing to his second brother.

Li Yuanjia has never thought of keeping things at home really secret, at least not outside the house. Because he knew that his identity was extraordinary, especially before the death of the Emperor Taishang two years ago, the best thing to do was to put everything in front of outsiders frankly.

It's not that you have to tell others in a big way, but you are not afraid of people who have a heart to explore.

For example, Wang Pu's improvement of papermaking, and then the movable type printing, as well as the previous tables and chairs, coal stoves, and quyuan plows, etc., but anyone who is interested in inquiring can always find out relevant news in the palace.

It's just that they can know what Han Wangfu is doing, but they can't figure out how to do it.

So the emperor knew that he was working on movable type, Li Yuanjia was really not surprised at all, and even took the initiative to explain the principle of movable type printing to the other party - he had explained this thing to many people, such as his younger brother Li Lingkui, his uncle Yu Wenshi and so on.

It's one thing to know how to make it, it's another thing to be able to make it.

Bi Sheng of the Song Dynasty invented movable type printing, but why was engraving still dominant in the next few hundred years? Isn't it because the technical requirements of movable type printing are high and the cost is high, so it is not practical at all?

It's like the thirteen spices, we all know that they are made by grinding various spices, but what is the ratio of various spices? Which ratio results best?

You don't want to do it without passing hundreds or thousands of trials?

Don't be funny!

Since Han Wangfu no longer sells thirteen incense, why have there been several sellers on the market, but everyone still comes to Han Shan from time to time? Isn't it because what they make doesn't taste as good as the original?

It took Li Yuanjia a few years for the blacksmiths and inksmiths to waste thousands of times before and after, and now the effect of movable type printing is unsatisfactory. And even if you do the same level as Han Wangfu regardless of your blood, what next?

Do you know what movable type is, do you really use movable type on wood or clay? Even if you get the metal type, can you make the ink? And then even if the metal type and ink are made, there are so many Chinese characters, how do you solve the problem of character inspection? How to solve the problem of crooked typography? How to solve the problem of inverted words and horizontal words? How to solve the problem of inconsistent font style?

Isn't it that Li Yuanjia looks down on his ancestors, and he can't do anything in the next few hundred years, and he can solve it by listening to his words?

This is a system project, and it is by no means something that can be realized by an idea.

Otherwise, even if someone can make the so-called movable type printing, it will be because of the quality of the printing, the literacy of the character inspectors, and of course, the most important thing is the cost, so that this epoch-making technology will become a chicken rib, and they will eventually be shelved......

Well, that's a long way off.

Of course, Li Shimin didn't know the twists and turns that flashed in his brother's heart just now, he just asked people to take out a dozen seals with great interest, tried them himself, and then raised his eyebrows and asked: "Eleven Lang, you spend so much time and time to make this thing, what is the use of him?" What are the benefits of it compared to engraving? ”

"This ......"

Although there was a moment of hesitation in his heart, Li Yuanjia soon gritted his teeth and said: "Actually, it's very simple, I hope that after solving all the problems, the price of books in Datang can be reduced, so that more people can afford to buy and read books!" ”