Sky Curtain: With a vermilion mirror, Jing travels through the modern world, shaking all dynasties.

Jiang Chuan carefully examined Lin Xiaoyu, and was about to speak when he heard Zhu Jingjing call out from afar, "Jingjing knows! Sister Xiaoyu isn't wearing those round glasses to protect her eyes today!"

"Jingjing noticed it! If I hadn't said anything, you wouldn't have noticed!" Lin Xiaoyu turned her back angrily. Jiang Chuan doted on the little princess, but showed no concern for her, his childhood sweetheart.

Jiang Chuan secretly scolded, "This little princess has such good hearing!"

He scratched his head awkwardly and quickly changed the subject, "You switched to contact lenses? Didn't you say before that wearing contact lenses for too long hurt your eyes?"

At this moment, Zhu Jingjing returned to their side in a wheelchair. "Brother, what are glasses? Are they those two pieces of glass that protect your eyes?"

After a moment's hesitation, Jiang Chuan asked, "Do you know Ai Dai?"

Zhu Jingjing nodded and replied, "It's used to describe a scene of thick clouds or swirling mist!"

"Yes, but not entirely," Jiang Chuan gently rubbed the little princess's head and corrected her, "The book 'Dongtian Qinglu' written by Zhao Xihu in the Southern Song Dynasty records: 'The Aidai is used by the elderly who cannot read fine print. They cover their eyes with it so that they can see clearly.' The Aidai of that time can be regarded as the prototype of eyeglasses."

Zhu Jingjing pondered for a long time, then suddenly realized, "I remember now! The Imperial Academy implies old-fashioned scholars who liked to hold a crystal in front of their eyes when they were studying. Could that be the Ai Dai?"

Jiang Chuan nodded approvingly. During the Hongwu era, there were no eyeglasses in the modern sense. The 'ai dai' at that time was more like a handheld magnifying glass.

Lin Xiaoyu leaned down and looked into the eyes of the little princess sitting in the wheelchair. "Jingjing, do you think I look better with glasses on or without them?"

Zhu Jingjing said, "Xiaoyu is beautiful; she looks good whether she wears it or not!"

Hearing this, Lin Xiaoyu lightly flicked the tip of her nose, "Jingjing has such a sweet tongue, much better than someone else!"

"Then what about those contact lenses?" Zhu Jingjing asked curiously, reaching out to touch and see if Lin Xiaoyu was wearing invisible glasses on her nose.

Lin Xiaoyu asked with a smile, "Jingjing, look closely at my eyes. Aren't they a different color than usual?"

Zhu Jingjing looked at it carefully and nodded, saying, "It really is! It's green, and as pretty as a cat!"

Lin Xiaoyu was pleased by the compliment and immediately took out a contact lens, placing it on her fingertip: "This is what is called a contact lens. It's not really invisible; it's just that because the material is thin and light, it's not easily seen when placed on the eyeball, hence the name."

Zhu Jingjing tilted her head, looking puzzled. "Won't that hurt my eyes? Even clean water splashed in my eyes makes me feel uncomfortable for a long time!"

"It might be a little uncomfortable at first, but you'll get used to it." Lin Xiaoyu gently pinched the little princess's cheek and said, "Jingjing, you have to take good care of your eyes, otherwise, like your sister, you'll be living without glasses if you don't have surgery!"

The Qin Dynasty, Xianyang Palace.

Ying Zheng, puzzled, asked, "Li Si, what use are these glasses? I can read documents clearly, even with the smallest characters; why would I need external aids?"

"Your Majesty, I have heard that among the Three Dukes and Nine Ministers, several suffer from eye diseases, either unable to read small characters or with blurred vision. Perhaps glasses can cure this disease!" Li Si replied.

Ying Zheng nodded. "Immediately order a replica to be made. If I were to contract this disease someday, wouldn't it jeopardize the affairs of state?"

The Great Ming Dynasty, Fengtian Hall.

"Chongba, many ministers in the palace rely on Ai Da. Why not have someone emulate the eyeglasses of later generations and improve upon them?" Empress Ma advised.

Zhu Yuanzhang shook his head and said, "Since the founding of the dynasty, I have personally reviewed memorials every day. Among all the civil and military officials, who is busier than me?"

Upon hearing this, Empress Ma quickly replied, "His Majesty personally attends to every matter, truly a model emperor. How can any of the officials compare?"

"If that's the case, I am still able to see clearly and have never suffered from eye disease, so I don't need to rely on that 'eye-eye'." Zhu Yuanzhang sat upright on the dragon throne, his brows furrowed as he swept his gaze across the officials. "Why are you all inferior to me? Could it be that you saw something you shouldn't have, and thus suffered divine punishment, resulting in your eye disease?"

All the officials in front of the palace kowtowed and confessed their guilt.

"Chongba, you are ordained by Heaven, so naturally you can ward off disasters and avoid illness. How can we ordinary mortals compare to you!" Empress Ma said hastily.

Zhu Yuanzhang seemed to understand something, then nodded and said, "The Empress's words make sense. Order the Ministry of Works to emulate later generations of eyeglasses, improve the 'aidai' (a type of eyeglass), and distribute it to all officials!"

modern.

Under Lin Xiaoyu's guidance, Zhu Jingjing quickly became proficient in operating her wheelchair.

"Jiang Chuan, is everything alright now?" Lin Xiaoyu said, "I'll take Jingjing for a walk around the neighborhood, you can stay home by yourself!"

Jiang Chuan shook his head repeatedly and said, "No, I want to go too."

Lin Xiaoyu gave him a defiant look and said, "Weren't you against Jingjing going out? If that's the case, why are you shamelessly following me?"

"Who wants to follow you? I'm worried about Jingjing!" Jiang Chuan retorted, echoing Lin Xiaoyu's words. "To put it bluntly, I don't trust you. I'm afraid you'll lose Jingjing!"

Hearing the two arguing again, Zhu Jingjing quickly tried to mediate, "Brother, Sister Xiaoyu, aren't you longtime friends? Why do you have to argue as soon as you meet?"

Both of them were taken aback. Their relationship was not bad, but they rarely met without arguing.

"It's all his fault! He always makes me angry!" Lin Xiaoyu glared at Jiang Chuan and said fiercely.

Jiang Chuan gave a wry smile and said softly, "Jingjing, don't worry. This is how we get along. There's an old saying, 'No discord, no concord.' The fiercer our arguments, the better our relationship is!"

Zhu Jingjing looked puzzled. Was this how modern people got along, using arguments to strengthen their relationship?

She immediately said, "Then add Jingjing too! I also want to get along better with my older brother and sister!"

Upon hearing this, Jiang Chuan and Lin Xiaoyu exchanged a glance and laughed at the same time.

"Jingjing, the saying 'the more you argue, the better your relationship' only applies to special people," Lin Xiaoyu explained softly. "With you, I'm too busy cherishing you to even argue with you!"

Zhu Jingjing was skeptical. Born into royalty, she was a pampered princess and naturally couldn't understand such feelings.

The three chatted and laughed all the way to a supermarket.

"I'm a little thirsty. Wait a moment, I'll go buy some water," Lin Xiaoyu said.

Upon hearing this, Zhu Jingjing volunteered as well, "Sister Xiaoyu, I'll go with you too!"

Jiang Chuan seemed to be deep in thought. Zhu Jingjing, in order to live in the modern world, could not always rely on them; she had to learn to be independent.

Why not take this opportunity to let her get some experience, starting with something as simple as buying things herself?

"Xiaoyu, wait a minute." Jiang Chuan called out to the two of them, saying, "Let Jingjing go buy it herself. We'll watch over her here and let her get some exercise."

"Jingjing, are you sure you can manage on your own?" Lin Xiaoyu asked with a worried expression.

Zhu Jingjing nodded vigorously, sat in her wheelchair, and came to Jiang Chuan, extending her hand to him. "Where's the money? How can we buy things without money?"