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

Jiang Chuan took a deep breath, his face a mixture of shock and disbelief.

He even suspected he was hallucinating. How could Lin Xiaoyu say such a thing to his face?

"I was just teasing you, don't take it seriously!" Lin Xiaoyu's ears subtly flushed red, and she quickly changed the subject, "You just have to promise me that when you get back from this business trip, you'll come with me to discuss a business deal!"

Upon hearing this, Jiang Chuan secretly breathed a sigh of relief.

"Xiaoyu, you almost gave me a heart attack!" He took a deep breath and nodded, "It's just accompanying you to a business meeting? No problem, I've got it covered!"

"Alright, it's a deal!" Lin Xiaoyu said.

The next day.

Jiang Chuan was giving a lesson to the little princess when the doorbell suddenly rang crisply.

Lin Xiaoyu brought Zhu Jingjing's ID card.

Taking the small, square card, Zhu Jingjing's face was filled with curiosity: "Brother, this is the ID card you were talking about, right? It even has my picture on it!"

Jiang Chuan nodded gently and patiently explained, "Although your Ming Dynasty also has a household registration system, identity documents are generally only used when the government is verifying them."

He gently ruffled Zhu Jingjing's hair, his eyes full of affection. "But here, without this identification, it's practically impossible to move an inch!"

"Is it really that amazing?" The little princess's eyes showed disbelief, and she pouted. "It's just a little card; it's easy to forge!"

Upon hearing this, Jiang Chuan couldn't help but laugh, gently tapping the tip of her nose: "You little brain of yours, you're certainly clever, but why do you always seem to be thinking of crooked and evil ways!"

He stood up, took out his ID card from the drawer, and placed the two cards side by side on the table.

"Look, this little card isn't just an ordinary piece of plastic," Jiang Chuan pointed to the surface of the ID card. "Just the design on it uses several anti-counterfeiting technologies. For example, this Great Wall design—if you gently scratch it with your fingernail, you can feel the subtle raised texture. And the two characters 'Dragon Kingdom' change color under different lighting."

Zhu Jingjing's eyes widened as she picked up the two cards and examined them closely. They were exactly as Jiang Chuan had described!

"That's nothing," Jiang Chuan pointed to the small chip area on the front of the ID card. "The most amazing part is here! This card contains a chip with your name, address, ID number, and photo."

"A chip?" The little princess blinked blankly. "You mean that kind of... magical device smaller than a fingernail, yet capable of storing countless things?"

"That's right." Jiang Chuan nodded and continued to explain patiently, "The information in this chip is networked nationwide. You can make a fake card that looks exactly the same on the surface, but you can't make the chip inside, let alone write the fake card's information into the Ministry of Public Security's database!"

"Brother, this is amazing!" Zhu Jingjing carefully held her ID card in her hands, afraid of accidentally damaging it. "I never imagined that such an inconspicuous little card would contain so many secrets!"

Jiang Chuan nodded and continued, "For things like buying train or plane tickets, or booking a hotel room, where identity verification is required, you'll need this little card!"

The Qin Dynasty, Xianyang Palace.

Ying Zheng gazed at the small card in the sky, the candlelight flickering in his eyes.

"Such a mere item, yet it can verify one's identity and is impossible to forge?" He paced back and forth in the hall, stroking his beard and sighing deeply. "If my Great Qin obtains this item, the latest chapter is ready! Book lovers, return swiftly! Then, the bandits roaming the four corners of the land and the fleeing refugees will have nowhere to hide!"

"Your Majesty is wise!" Li Si stepped forward, cupped his hands and bowed deeply. "I believe that if this object were paired with the Heavenly Eye that monitors the world, the two would be combined, and the world would be at peace and tranquil."

The Great Ming Dynasty, Fengtian Hall.

Zhu Yuanzhang frowned and murmured, his eyes filled with contemplation: "A chip? And a nationwide network? This kind of anti-counterfeiting technology far surpasses my half-seal verification!"

Seeing his dejected expression, Empress Ma quickly comforted him gently: "Chongba, the half-seal collateral you created is already an extremely ingenious method of preventing counterfeiting. Although the techniques of later generations are mysterious, they mostly rely on ingenuity that our Great Ming Dynasty lacks. The two are not comparable at all."

Upon hearing this, Zhu Yuanzhang's expression softened slightly.

Since it is difficult to catch up with later generations, comparing ourselves with the previous dynasty can at least save some face.

The Great Tang Dynasty, Taiji Palace.

Li Shimin sat upright on the dragon throne, marveling at the mystery of the identity verification system of later generations, when suddenly he saw golden characters appear in the sky.

"The method of using half-seals for verification that I created, though not as profound as that of later generations, still has its unique advantages. I wonder what good strategies you gentlemen have for preventing counterfeiting? — Zhu Yuanzhang, Hongwu Emperor of the Great Ming Dynasty."

"I ordered officials to bind bamboo slips with ropes, attach specially made soft clay to the knots, and solemnly affix the official seal. Once the clay has dried completely, it becomes a 'sealing clay,' which must not be easily destroyed! This is the sealing clay method I created. Now tell me, which method of matching half seals is superior? —Qin Dynasty, First Emperor Ying Zheng."

"This cumbersome process is hardly worthy of being compared to the Half-Seal Token I created? The Half-Seal Token is divided into two parts; when they come together, it is genuine! — Emperor Hongwu of the Ming Dynasty, Zhu Yuanzhang."

Li Shimin watched the two emperors conversing across time and space, and couldn't help but shake his head and smile wryly: "This sky has truly become a 'live broadcast room' for later generations. Not only does it broadcast the same scene across different times and spaces, but it also allows viewers to exchange ideas and debate with each other. It's really interesting!"

modern.

"Jingjing, stop fiddling with it and put your ID card away!" Jiang Chuan smiled wryly as he saw the little princess's adoring expression. "Don't be lazy. We're going on a business trip in a couple of days, and we won't have time to teach you then."

Zhu Jingjing pouted and muttered softly, "The new textbooks haven't arrived yet..."

Jiang Chuan reached out and gently pinched her cheek, interrupting her complaint: "Since the new textbooks haven't arrived yet, just flip through the ones I used before. Although I made some modifications, the overall difference isn't significant."

Upon hearing this, Zhu Jingjing suddenly remembered something.

She pulled out a few sheets of paper covered in tiny, dense writing from the stack of textbooks and ran excitedly to Jiang Chuan: "Brother, I found these in your books yesterday! The writing on them seems interesting, but I can't understand some of it. Can you explain it to me?"

Jiang Chuan was startled, and his heart tightened suddenly!

He had no recollection of the few papers the little princess had pulled out; could they be sentimental poems he had written in his student days?

It couldn't be something like a love letter!

If that's really the case, what can he say?

Should I tell the little princess every single one of the stupid things I did back then?

"Brother, what's wrong?" Zhu Jingjing noticed his strange expression and tilted her head to ask, "It's just a few pages of paper, what kind of shady things are written on it?"

"Jingjing, it's not what you think, those..." When Jiang Chuan saw what was written on the paper, his expression immediately turned strange.

Attention all die-hard fans of Yu Shan Jing Lun! The latest chapter of "Sky Curtain: Traveling Through Modern Times with Zhu Jingjing, Shaking All Dynasties" has been released!