After hearing this, Zhao Yuan looked over curiously.

He didn't care much about the glass workshop, just pretending to be a small business that she was trying to do.

What he cared about was the arsenal, land and merchant ships.

Unexpectedly, she made a huge profit of 100,000 taels in just a few months.

This cannot be said to be a small business.

Zhao Yuan began to be curious, what she was trying to do.

Yun Dai opened the box and took out a pair of transparent...glass from it.

"What is this?" Zhao Yuan took it and looked at it. Two round lenses and strange and thin shelves.

"This is called glasses." Yunde took the glasses and put them on the bridge of his nose, "That's how it is used."

Zhao Yuan looked at her and smiled and said, "What is it for so weird?"

"For those who are not good at eyes," Yun Dai said, "Have the emperor seen people who can't see clearly when they are far away?"

"Yes." Zhao Yuan thought for a while, "When Prince Chun was young, his eyes were so strange that he couldn't see the person opposite him clearly. His son was eight years old, and he was the same as him."

"This is called myopia. His son probably inherited him." Yun Dai smiled, "When you look at the lens, there is a thickness in the middle, it is actually an imitation magnifying glass. You can enlarge the things in the distance so that your eyes can see clearly."

“So magical?”

Zhao Yuan took it and said, "Show me."

Yun Dai took off her glasses and put them on his eyes.

Zhao Yuan looked at her and frowned: "I felt so dizzy."

Yun Dai chuckled, "This means you have good eyesight and don't have myopia."

Zhao Yuan hurriedly took off his glasses and said, "In this way, if this mirror is worn by King Chun, he will see clearly? How much does it cost to sell in your shop?"

"From ten taels to five hundred taels."

“…so expensive?”

"It's not expensive at all. Everyone has different degrees of myopia. This is specially customized according to their own situation." Yun Dai explained, "This is all hand-polished. It takes a lot of time to make a pair, and it is naturally expensive."

"Then why some are worth ten taels, while others are sold for five hundred taels?"

"The materials are good, the appearance is good, and the packaging box is expensive." Yun Dai said.

"This is more than fifty times the price?" Zhao Yuan shook his head, "Since the functions are the same, why do people choose expensive ones?"

"Your Majesty, you don't understand." Yun Dai took away his glasses, "This is called taste. There are so many rich people in our Great Zhou."

"What's the money to buy this?"

"Follow the trend and compare."

"Whose wind?"

"The Emperor." Yun Dai opened another box and took out a pair of glasses with gold edges. "Look, this is a frame made of pure gold, which can definitely highlight the emperor's high-end taste. As long as you bring it with you and show it to the ministers, there will naturally be someone who follows the trend."

Zhao Yuanyang Mei: "Give me? My eyes are so good, so there is no need for this."

"This pair of glasses are not myopia, but flat-light glasses."

Yun Dai spread her glasses, took them with her, looked at her for a while, nodded, "Single, I like it."

Zhao Yuan blinked: "Don't dizzy."

"That's natural." Yun Dai smiled, "This only serves as a decorative function. I also want to sell sunglasses. Of course, I don't have this technology yet and am still under development. I will sell myopia glasses, reading glasses and peaceful light mirrors first."
Chapter completed!