For Fang Bong-joo and Han Cheng, the transparent glass windows that can bring in sunlight even in winter, and the delicate mirrors that can illuminate people's faces and even their entire bodies, seem to be the limit of their imagination.

For Li Yuanjia, however, this is just a small use of glass.

At least in his opinion, any use in ordinary civilian items will never reflect the true value of glass.

The real meaning of the existence of this thing is the use of scientific research!

Optics, medicine, biology, which can leave glass?

Vaguely, Li Yuanjia even remembered an article he had seen in his previous life, which exaggerated that the technological gap between China and the West after hundreds of years lies in the fact that they have taken different paths in history - porcelain and glass!

The argument of the article is that the Chinese are not very interested in glass that appeared a long time ago because they have porcelain that is more suitable as a container and has more artistic value. Westerners, on the other hand, were not very successful in porcelain, but the technology of glass was far ahead of the East, which led to the later leadership in many scientific fields......

Because the article itself has a bit of a joke, Li Yuanjia just used it as a pastime when he read it, and he didn't care too much. But when he traveled to this world and pondered what he should do first, Li Yuanjia suddenly thought of this article.

Glass seems to be really important.

So Fang Fengzhu suddenly called Han Cheng and questioned the huge investment in the glass workshop and the long time of nothingness, although Li Yuanjia was not dissatisfied, it did not mean that he would only watch and do nothing.

Simply told the princess that glass can be made into windows and mirrors, and first, to tell Fang Fengzhu that this glass ...... Or that the glass in her understanding is not only good-looking, but also has a greater role; And the other, and more important, thing is Ahn Han-sung's heart.

Li Yuanjia didn't want to let Han Cheng worry about this and that because of today's incident, he would delay the work in hand.

Although no matter from which point of view, Han Chengdu is not a qualified "scientific research director", otherwise he would not have made a piece of glass that satisfies Li Yuanjia until now. But there is no way, in this era, Li Yuanjia can only be a lame general, at least this kid is literate, knows some simple basic mathematics, and has learned a lot of experimental skills with Wang Pu!

Of course, more importantly, he is absolutely loyal to Han Wangfu and is willing to do things that are more humble craftsmen in the eyes of others.

If Han Cheng quits, where can he find someone to replace him?

It's a pity that after a lot of words, Li Yuanjia regretted to find that not to mention Fang Fengzhu, who kept a smile on his face, even Han Cheng's eyes flashed with hesitation!

After a while, Fang Fengzhu asked with some hesitation: "King, can you really make that kind of ...... A very clear mirror? Just the kind of glass you said? ”

"Yes, for sure."

Nodding, Li Yuanjia gave Fang Fengzhu a firm smile.

Sure enough, a woman's focus is always on the mirror.

And after biting his lip after biting his lip with Li Yuanjia's determined look, Fang Fengzhu nodded and smiled: "Since this is the case, then this glass workshop is indeed worthy of the king's attention...... King, I'm just a little curious, that's why I called Han Cheng to ask, and I didn't mean anything else. ”

"Haha, I understand this."

Li Yuanjia also laughed and said very gently: "I have said a long time ago, Fengzhu can ask about the affairs of the palace, and this glass workshop is naturally no exception." And after this question, don't you know the future use of glass? It's just that I also saw these things from a book by chance, but the specific method is not very clear, so I can only rely on Han Cheng and them to try it little by little...... Fortunately, now that they're finally in the door, they can make nice glass, aren't they? ”

Under Li Yuanjia's gaze, Han Cheng nodded busily and said, "Yes, princess, we can already make some glass beads with relatively high transparency...... According to the king, transparency is how much can be seen through these glasses, and the more you see, the higher the transparency! It's a pity that the glass is always colored, so we spend a lot of money every month to buy things from the warlocks......"

While shaking his head, Han Cheng really felt very regretful.

After countless attempts in the past two years, Han Cheng and his craftsmen can really make glass with high transparency. But as he said just now, even if the yellow glass is very transparent, at most it is a little better than the goods of the people of the Western Regions, it still can't meet the king's requirements.

So Han Cheng and the others can only continue to work hard, try to add more minerals when making glass, and look forward to one day making truly colorless and transparent glass!

At that time, they will try to make glass into flat plates, and then make what the king calls glass windows and mirrors.

"Hehe, don't worry."

At this time, Li Yuanjia opened his mouth and said with a smile: "Look at Wang Pu and them, how much time did it take to make the white paper?" But as long as you keep trying, you can always make a real glass mirror. ”

The words seemed to be said to Han Cheng, but Li Yuanjia's eyes were looking at Fang Fengzhu.

Of course, it's just a bit empty.

But in any case, Li Yuanjia will not tell his princess, in fact, it is not particularly difficult to create colorless transparent glass, what is difficult is to create the mirror that women want! After all, Han Cheng and the others have now created colored glass, and the next step is to improve the transparency step by step, and then find a way to remove the color - Li Yuanjia remembers that a mineral was added, although he didn't know which one it was, but he could always succeed if he kept trying!

But it's much more difficult to build a mirror.

If it weren't for the blessing of the Internet, Li Yuanjia knew that he used mercury and tin foil to make a mirror, he wouldn't even be sure if he would have any hope of seeing a mirror in his life!

And......

"The most important thing is glass!"

Thinking that what he wanted was actually glass, and the mirror or something was at most a piggyback foot to "invent", Li Yuanjia felt a sense of guilt in his heart for deceiving the other party.

However, this feeling also passed in a flash, Li Yuanjia quickly moved in his heart, and grabbed Fang Fengzhu's small hand with a smile: "Fengzhu, if you are interested in glass, you can ask Han Cheng to come once a month in the future to find out what they have done in this month, what things they have tried to use, and so on." Hehe, maybe you'll soon find out that what they're doing is actually quite interesting......"