"Most of the things in this world don't come naturally, and the words of the saints' books are used to discipline the world, and have no practical use."

The emperor's words sounded a little reasonable, and Zhang Yang sighed: "Yes, there are often all kinds of difficult things in this world, how can there be so many things that come naturally." ”

Zhang Yang poured tea and continued: "Nanzhao has found a copper mine. ”

Li Shimin took the tea bowl and asked, "When did it happen?" ”

"News from half a month ago." Zhang Yang put the weight of his body on the back of the chair, shook the fan in his hand, and said in a low voice: "The minister got acquainted with a person, he was originally renting a carriage in Chang'an City, and later it seems that he was calculated by the powerful family, and his family business was taken away, and then he went to Luoyang. ”

"After restarting his career, he made a lot of money, and when he came to repay his kindness, I asked him to go to Nanzhao to help me transport copper mines."

Li Shimin bowed his head and said: "You want to mint money?" ”

Zhang Yang shook his head, "Lishan doesn't mint money, and it doesn't bother to cast money, the casting process is inseparable from copper, and it will need a lot in the future." ”

"Nanzhao's affair really made you rich."

Speaking of which, Zhang Yang was reluctant to say more.

This is Lishan's family business, as the emperor inquired about other people's family business and family property spread out is not good, besides, Lishan is surrounded by Longwu Army, all the accounts are clear, you can rest assured.

Zhang Yang took out a wooden box, and after opening it, there was a row of lenses, "Your Majesty try it, choose the most suitable one." ”

Li Shimin frowned and said, "Liuli? ”

"Well, burn it out."

"You have a secret recipe."

Holding a piece of Li Shimin and observing it carefully, he was speechless, "It's the first time I've seen such a transparent glass in my life, if there is only such a piece in this world, it's worth ten thousand gold." ”

"I can give Your Majesty two pieces."

"Two pieces?"

Zhang Yang sighed: "It is very difficult to fire, not to mention this, Your Majesty will come to measure your eyesight first." ”

There are a lot of new things on Lishan, and it is the first time that Tian Khan has experienced such a thing as measuring his eyesight.

Zhang Yang reminded: "Your Majesty must seek truth from facts, and if you can't see clearly, you can't see clearly." ”

Li Shimin said with a straight face: "You mean it." ”

Identifying the direction from top to bottom, Zhang Yang turned back and tried a few times, but lost the wooden stick in his hand and didn't want to test it.

"What? Can't measure it?"

"If you can't see clearly, you can't see clearly, Your Majesty don't be blind."

"Are you saying that my eyes are bad?"

Zhang Yang held his forehead and said: "This is not a show, this is a doctor, please be honest with Your Majesty." ”

Li Shimin snorted: "If you can't see clearly, I will shake my head." ”

After re-testing it a few more times, Zhang Yang had a firm grasp of the emperor's eyesight, which was probably between 4.6 and 4.5.

Picking out a piece of lens from the box, the emperor tried several times before picking two thinner ones.

The ancients also had myopia, but myopia was not too profitable.

After Tian Khan put on his glasses, his whole spirit was much better, especially when he didn't have to stretch his neck and squint when he watched the music.

Li Shimin snorted coldly: "I thought that some kind of magic medicine could restore the eyes to their original state, but I didn't expect to wear such an object on my face." ”

"It's all wisdom." Zhang Yang put away the wooden box and said.

"Do you want to keep these lenses?"

"Hmm."

Zhang Yang lifted the wooden box, and seeing that His Majesty was still looking at it as if he was greedy, Zhang Yang asked Xiao Wu on the side to take it back to the study until the box with the lenses disappeared from sight.

This thing is valuable, very, very valuable.

Li Shimin even felt that the pair of glasses on the bridge of his nose was worth tens of thousands, and such a transparent glass was rare in the world, and it may only be available in Lishan.

Zhang Yang has a secret recipe in his hand, and he can fire the glaze, in a certain sense, only the glazed Lishan can have as much money as he wants.

"Your Majesty's myopia is already very serious, I don't know how you used to read the music, the handwriting is not clear, it is easy to be anxious under physical and mental exhaustion, and it is not good for recuperation."

Zhang Yang shook the fan indifferently, "This pair will be given to Your Majesty, but the craftsmanship is poor, and it is a little yellowed." ”

Li Shimin picked up the booklet on the side and looked at it, this is Lishan's account, no need to look closer, no need to squint, and said with a smile: "How many years, since I ascended the throne, I don't know when I started to read the chapter will be very tired, with this thing, it is clear at a glance, clearly visible, I am ashamed, but ......"

"There are still many people in the court who need this thing, Fang Xiang, Zheng Gong, they are all the same, I am willing to pay 100,000 yuan to buy everything."

"It's not about money."

"You won't."

"It's not that the minister refuses, it's just that Lishan doesn't want cash, and if Your Majesty wants it, you can exchange the conditions."

"What conditions do you want in Lishan?"

"When Fang Xiang and Zheng Xiangxiang return to their hometowns, they can come to Lishan to live for a while."

"I promise you, even if I don't say it, they want to come to Lishan to have a look."

The conversation ended calmly, and His Majesty took out his glasses in the Xiaoxing Palace, which made the palace maids and eunuchs on the side curious for a long time.

On the wooden frame are two pieces of transparent glass.

Li Shimin liked this feeling at a glance very much, and even watched a few more pieces of music at night, and the anxiety in his heart was relieved a lot.

Even if the opening of the government school is still blocked, I am not annoyed.

Because he can read the words clearly, Li Shimin seems to feel that he is young again.

"Your Majesty, is this brought by Lishan?"

"Well, it turns out that there is no miracle medicine in this world that can refresh the eyes, but only with the help of external objects to make things in front of you clearer."

Empress Changsun thought of one thing, so she sneered, "There is another thing in Lishan, called a magnifying glass, Zhang Yang wants to cultivate crops, he can see the small changes of a wheat plant with the help of a magnifying glass, and I heard that he also plans to build a telescope, which is said to be able to see the layout of soldiers and horses thousands of miles away." ”

"The slave said that it was called clairvoyance, and said that if it could be made better, he would be able to see what the stars in the sky looked like, and he would be able to see clearly what was going on on the moon."

"If there really are such objects in the world, can you also see immortals?"

Empress Changsun shook her head and corrected: "Lishan is a mountain gate that pays attention to seeking truth and knowledge, they believe that seeing is believing, and they are good at presenting evidence for verification. ”

Li Shimin closed the concert, nodded and said, "Guanyin, do you also think that I have been in a hurry to achieve quick success in government affairs recently?" ”

"The concubine feels that Your Majesty hasn't gone out for a long time since last autumn and after the ban on autumn hunting, look at the scenery in the pass, stop and take a walk, and have a good meal."

Inexplicably and a little sad, Li Shimin felt that he had neglected a lot of things.

The queen will not participate in political affairs, all she can do is maintain the harem and run the clan.

She won't stand in the way, Li Shimin took off his glasses, and then looked at the piece and returned to his previous confused state, "Well, I'm not the same year anymore." ”

There is a kind of helplessness to compromise with reality, the eyes will not return to the brightness of the past, and they will eventually need to rely on external objects. (End of chapter)