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

After taking the little princess for a walk around, Jiang Chuan and the other two returned home.

"Brother, you'd better keep your phone safe!" Zhu Jingjing reminded him hurriedly after they got home. "If someone steals it, you'll go bankrupt!"

Jiang Chuan was taken aback. "Why did you go bankrupt? Losing a phone is indeed troublesome, but you can just buy a new one. The most troublesome thing is the various data stored on the phone."

Zhu Jingjing tilted her head and asked, "Brother, if your phone gets stolen, won't they just use your assets to create digital currency at will?"

Jiang Chuan shook his head slightly, "How could that be? If that were true, mobile payments would never have taken off!"

As he spoke, he showed the little princess the payment app. "Jingjing, actually my money isn't in my phone, it's in this app! And to use the money in the app, you need to enter a password, even though I've set it up for small amounts without a password."

Zhu Jingjing looked completely bewildered. The terms "software" and "passwords" left her utterly confused and unable to understand what was being said.

Jiang Chuan scratched his head, knowing that it would be difficult to explain clearly with words alone, so he simply said, "I'll buy you a cell phone tomorrow, and you'll understand once you use it."

Upon hearing this, Zhu Jingjing nodded excitedly. She had long noticed that Jiang Chuan never let go of his phone, which must be extremely important to him. She had wanted her own phone for a long time!

At this moment, Lin Xiaoyu got up from the sofa. "Jiang Chuan, I'm going back now. I'll come find you tomorrow and we'll go buy a cell phone together with Jingjing."

Jiang Chuan glanced at the time and said, "How about we have dinner before you leave? It's my treat today, so just let us know what you'd like to eat!"

Lin Xiaoyu gently shook her head, "Let's leave it for next time. I need to go to the post station; I have a package to send out."

Jiang Chuan was about to agree when Zhu Jingjing interrupted, "Sister Xiaoyu, what's express delivery? Is it delicious?"

Lin Xiaoyu smiled and ruffled the little princess's hair. "Courier services aren't for eating, although they can be used to send food."

Zhu Jingjing's curiosity was piqued again, and she clung to Lin Xiaoyu's arm, refusing to let go. "Sister Xiaoyu, Jingjing wants to go with you too, to see what that package is!"

Jiang Chuan frowned slightly and stepped forward to stop her, "Jingjing, don't be silly! Your sister Xiaoyu has important business to attend to; she doesn't have time to look after you!"

"Why are you being so fierce? Who said I can't look after Jingjing?"

Before the little princess could speak, Lin Xiaoyu objected, "Jingjing, you're coming with me! It's just sending a package, not going to war!"

"Alright then, I'll go with you guys too." Jiang Chuan had no choice but to compromise. "We can have dinner together after we finish sending the package."

The Great Ming Dynasty, Fengtian Hall.

"Chongba, what do you mean by this package?" Empress Ma asked in confusion.

Zhu Yuanzhang stroked his beard in thought and replied, "According to what that woman surnamed Lin said, express delivery can be used to send food, which seems similar to the courier stations I have established!"

"Then the subways of later generations could travel thousands of miles in just a few hours," Empress Ma exclaimed, suddenly realizing, "With that speed, how fast would it be to deliver items!"

Zhu Yuanzhang nodded and sighed, "If our Ming Dynasty had such speed, transporting military supplies would be a piece of cake. At that time, what difficulty would it be to wipe out the Northern Yuan, Goryeo, or Japan in one fell swoop!"

Modern-day express delivery station.

Zhu Jingjing looked curiously at the package in Lin Xiaoyu's hands and asked, "Sister Xiaoyu, what's inside?"

"These are all local specialties and delicacies."

"My younger sister back home is always asking for it," Lin Xiaoyu replied while filling out the relevant information.

Upon hearing that it was food, Zhu Jingjing's eyes lit up, and she gently tugged at Jiang Chuan's sleeve.

"You're such a little glutton!" Jiang Chuan could easily see through her thoughts, and affectionately ruffled her hair. "We're going to buy a phone tomorrow, right? I'll buy you some to try on the way."

Zhu Jingjing dodged away in disgust, saying, "Stop touching me, or I'll go bald!"

Jiang Chuan grinned mischievously. If Zhu Jingjing were alright, he could try to avoid her, but now that she had twisted her ankle and was in a wheelchair, she was completely at his mercy. "Jingjing, don't worry, your hair is so thick, you won't go bald!"

At this moment, Lin Xiaoyu finished everything, stretched, and said, "Finally done. Let's go have dinner."

"Xiaoyu, is sending things elsewhere what you call express delivery?"

Lin Xiaoyu nodded and said, "You don't seem surprised at all. What, do you have express delivery services in the Ming Dynasty?"

Zhu Jingjing replied, "Of course! Father Emperor established courier stations and express delivery stations, both for transporting goods, much like express delivery services!"

The Great Tang Dynasty, Taiji Hall.

"The express delivery system of later generations is quite similar to my nationwide postal station system." Li Shimin's lips curled up. After seeing so many things, the Tang Dynasty finally had one thing that was not inferior to later generations!

Seeing this, Wei Zheng advised, "Your Majesty, in my opinion, even ordinary people can send packages using modern express delivery services, but in our Great Tang Dynasty..."

He deliberately drew out his words, leaving them unfinished, to remind Li Shimin of the difference.

The postal system of the Tang Dynasty was indeed advanced, with ordinary documents traveling 70 li a day and urgent documents traveling 500 li a day. It could not only deliver documents, but also transport various fresh foods. Although the speed could not compare with later generations, it was still sufficient.

The problem was that the postal system in the Tang Dynasty was only used by the royal family and the nobility. Ordinary people could only send a letter home by merchants, which sometimes took several months.

The problem was that the postal system in the Tang Dynasty was only used by the royal family and the nobility. Ordinary people could only send a letter home by merchants, which sometimes took several months.

"Wei Zheng, why have you spoiled my mood!" Li Shimin was immediately furious. He had finally found something comparable to later generations, only to have it dampened by Wei Zheng's cold water. "If everyone could use the post stations of my Great Tang, how many fine horses would be needed! If you can conjure horses for me, I will open them up for all people to use, how about that?"

Wei Zheng knelt on the ground and said, "I am merely stating the facts. If I have angered Your Majesty, then punish me as you see fit!"

"You dare not do that to me!" After saying this, Li Shimin got up and paced around.

After a while, his anger subsided, and he personally stepped forward to help Wei Zheng up. "My dear minister, you are right. It was my fault just now. I wronged you!"

Modern street-side restaurant.

"Jingjing, why aren't you eating? These dishes aren't to your liking?" Lin Xiaoyu rolled her eyes at Jiang Chuan, who was wolfing down his food, and asked with concern.

Jiang Chuan was taken aback. He had been so focused on eating that he hadn't noticed the little princess hadn't touched her chopsticks.

Not only that, she hadn't said a word since the beginning, looking like she had something on her mind.

Jiang Chuan asked, "Jingjing, what's wrong? Is something on your mind?"

Zhu Jingjing picked up her chopsticks and gently shook her head: "It's nothing, I just suddenly thought of my father and mother."

Jiang Chuan remained silent. No matter how good he was to the little princess, he could never replace her parents.

"Jingjing, are you homesick?" Lin Xiaoyu placed a piece of meat on her plate and said, "If you have something on your mind, feel free to tell your sister!"

Zhu Jingjing nodded slightly and said, "I wonder if my father will receive a package I send him..."