Confucius Temple, in front of the store.

Zhao Hao asked a lot of questions and looked at almost all the glasses in the store, but he still didn't say which pair he wanted to buy.

This gradually wore out the shopkeeper's patience. However, since the shop had not opened yet, he had no choice but to suppress his impatience and deal with it with a smile on his face.

"Sir, which one do you like?"

"Yeah." Zhao Hao put down his glasses and asked him, "What is the level of the master in your shop in Jinling?"

"This is the only one in Jinling City. There is no other store like it." The shopkeeper replied proudly.

"What about across the country?" Zhao Hao asked again.

"I can't say anything about the Imperial Household's workshops. Apart from that, I can't say my shop's craftsmanship is better than anyone else's, but I won't admit it's worse either." The shopkeeper answered stubbornly, and then finally couldn't help asking, "Sir, have you made your choice?"

Zhao Hao smiled and snapped his fingers twice, and Gao Wu placed two ingots of fifty-liang official silver on the counter.

"Sir, what do you mean?" The shopkeeper looked puzzled, but his expression was much more relaxed.

"You don't have anything here that satisfies me. I want to customize one for myself." Zhao Hao said slowly.

"Sir, do you want to customize it?" The shopkeeper only does business with wealthy people, so he is obviously used to it. "We can make gold and jade frames."

"I want a pair of dark-colored plain glasses. The lenses can be smaller, and the frames should be as light as possible."

"Dark-colored flat glasses?" The shopkeeper was stunned for a moment, then asked tentatively, "The kind that is neither convex nor concave, and it doesn't matter whether you wear it or not?"

"Not bad." Zhao Hao nodded with a smile.

"That's easy. I can just use black crystal to grind a pair for you." The shopkeeper smiled and replied, "This is much cheaper. Even if I buy you a pair of gold-wire frames, it won't cost that much."

"Just keep it." Zhao Hao waved his hand generously, and said, "Take me to see the mirror polisher, and I will tell him the requirements in person."

"That's no problem." The shopkeeper happily put away the hundred taels of silver. His business has always been like three days of closing and half a month of profit after reopening.

Then he lifted the door curtain and invited Zhao Hao into the backyard.

In the backyard, two masters and two apprentices were grinding lenses.

I saw the apprentice stepping on a pair of wooden stirrups that looked like bicycle pedals. There was a transmission belt in the middle of the stirrups, which drove the small mill on the platform to rotate at a constant speed.

The mirror polisher was concentrating on holding the pieces of crystal in his hands and polishing them carefully with the white mud-like polishing material.

Apparently the secret lies in the master's hands, and he is not afraid of outsiders seeing it.

However, in order to avoid suspicion, Zhao Hao just glanced and turned his head away, pretending not to be interested.

The shopkeeper called a gray-haired mirror grinder and said, "Old Lu, this young master has some requests. You must listen carefully."

Old Lu nodded, stood hunched beside Zhao Hao, watched Zhao Hao draw on paper with a pen and listened to his explanation.

After hearing this, Old Lu smiled confidently and said, "I understand. I will tie the temples the way you said."

"Okay, draw it beautifully. If you do a good job, I will reward you handsomely." Zhao Hao then put down his pen, agreed with the store owner to pick up the mirror in ten days, and left with Gao Wu.

After walking a distance, Zhao Hao suddenly asked Gao Wu, "Do you remember what those two mirror-polishing masters looked like?"

After a while, Gao Wu finally answered: "Yeah."

"Try to invite someone to your home later, and don't let the store owner find out." Zhao Hao ordered in a deep voice.

Gao Wu nodded silently, and Zhao Hao didn't need to worry about the rest.

~~

Gao Wu was very efficient and brought the person back in the middle of the night.

When Zhao Hao was awakened from his sleep by him, he put on his clothes and came to the deserted secluded courtyard, he saw a sack that was constantly squirming.

Zhao Hao was stunned. After a long while, he covered his face and said, "Let the man out quickly."

"Oh." A man from Caijia Lane opened the sack and released a gray-haired old man who was tied up and gagged with rags. Wasn't he the mirror-grinding master surnamed Lu?

Gao Wu quickly untied Old Lu and pulled off the rag that was gag him.

As soon as Old Lu was untied, he knelt down and kowtowed to Zhao Hao, begging him to spare his life.

Zhao Hao glared at Gao Wu fiercely, then helped Old Lu up with his own hands and said gently, "They misunderstood my meaning. I asked them to invite you here in a nice way, not in this way. I'm sorry to scare you, old man."

"Ah..." Old Lu was stunned and couldn't speak for a long time.

Then a fierce man explained, "Sir, we followed the old man out of the store until there was no one around, and then we went over to him and told him that my master wanted to see us. But he started screaming, so we had no choice but to cover his mouth..."

"He struggled desperately again, so we had no choice but to tie him up..." another man explained.

"I saw that you all looked so fierce and ferocious, and I thought you were robbers in the middle of the night." Old Lu smiled bitterly and then he believed that it was a misunderstanding.

Zhao Hao immediately asked Gao Wu to prepare a table of wine and food, and personally served the cup to Old Lu to calm him down. After the old man calmed down a little, he explained his intention.

"I would like to ask my father-in-law to spare ten days or half a month to help me build a few things."

"I'm afraid my boss won't give me leave." Old Lu subconsciously refused.

Before he finished speaking, Gao Wu placed two silver ingots in front of him.

When Old Lu saw the two official silver coins worth fifty taels each, he swallowed his saliva.

Mirror polishers are considered high-paid people in Jinling City, but their monthly income is only ten taels of silver. If they can earn nearly a year's money in ten days or half a month, anyone would be tempted.

"Well, I'll think of a way." After hesitating for a moment, Old Lu finally gave in.

"After the task is accomplished, I will reward you with another hundred taels." Zhao Hao said lightly. To him now, this amount of money was nothing.

"Okay, I'll ask for leave tomorrow, saying that my father-in-law passed away and I need to go back to help take care of things." Old Lu immediately showed the spirit of overcoming all difficulties, patted his chest and said, "I'll be at your disposal within half a month!"

"What about the mirror-grinding tools?" Zhao Hao asked, "And the East China Sea crystal..."

"Don't worry, young master. I have a full set of equipment at home." Old Lu smiled awkwardly and said, "The boss's price is too high, so people often ask me if I can take private jobs..."

"That's good." Zhao Hao breathed a sigh of relief and immediately asked Gao Wu to take people to the old man's house overnight to retrieve the mirror grinding tools.

He returned to his study, recalled it carefully, and then picked up a pen and started drawing on paper.

The next day, Gao Wu came to report that everything was ready.

Zhao Hao picked up the drawn blueprint, went to the courtyard, and explained his real requirements to Old Lu.

"Grind two triangular prisms for me. One has an acute isosceles triangle as its base, and the other has an equilateral triangle as its base... What? Are you confused? All right, I'll mold them for you with mud later. You can copy them, right?"

"This is a convex lens, the same as your reading glasses, but the diopter...Okay, I want a very flat lens, not a very convex one."

"This is a concave lens, the same as the reading glasses. It should be one-third the size of the reading glasses. Can you give me a few more?"

ps. Sixth update, 200 monthly tickets plus more... Please give me monthly tickets and recommendation tickets~~~~