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

The world depicted by Yu Shan Jing Lun can be found in "The Sky Curtain: A Quiet Journey Through Modern Times with a Crimson Mirror, Shaking the World".

Modern cruise ship, lower deck, sightseeing submarine cabin.

Zhu Jingjing opened her mouth slightly, her almond-shaped eyes sparkling as she examined the submarine in front of her. Its streamlined hull gleamed with a cold metallic luster, like a silver shark sleeping in the shallow sea.

The hatch is round, with a thick metal frame inlaid with nearly transparent special glass.

She tiptoed and peered inside, and saw four comfortable seats arranged along the porthole, with soft, warm light shining overhead. It felt as if she was about to step into a small house that could dive.

"Wow! Is this a submarine? It's so beautiful!" the little princess exclaimed in amazement.

Lin Xiaoyu smiled and introduced, "The safety features are very comprehensive, including escape hatches and oxygen masks. Ordinary sightseeing submarines can only cruise at a maximum depth of 50 meters, but this 'Shark' can reach a maximum depth of 200 meters!"

Upon hearing this, Jiang Chuan frowned: "Xiaoyu, don't be ridiculous. If I remember correctly, the 'Jiaozi' operates at a depth of 50 meters, and in terms of viewing experience, 20 meters is the optimal choice, isn't it?"

"I'll handle the arrangements, don't worry! We're going down to the seabed anyway, what's the point of diving so shallow?" Lin Xiaoyu pouted. "We'll dive to 100 meters this time. Don't worry about safety, I've hired a very professional pilot!"

Jiang Chuan's expression softened slightly.

If the maximum depth is 200 meters, 100 meters should still be within the safe range.

Besides, even if Lin Xiaoyu were being reckless, she wouldn't joke about her own life.

The three people sat down in turn, and the staff carefully checked the airtightness of the hatch before leaving.

After giving a few instructions, the fully armed driver officially began the descent.

With a low, mechanical hum, the cabin trembled slightly and began to slowly sink.

Zhu Jingjing leaned against the porthole, her eyes fixed on the sea outside. At first, she could see the spray from the propeller at the bottom of the cruise ship, and a few small, silvery-white fish scattered in panic.

The light gradually dimmed, changing from light blue to sapphire blue, and then to deep inky blue.

"Brother, look! The color has changed!" Zhu Jingjing excitedly tugged at Jiang Chuan's sleeve.

Jiang Chuan smiled and pointed out the window: "Because blue light has the shortest wavelength and the highest energy, it is absorbed the least by water molecules, so the deeper the place, the more intense the blue color."

Zhu Jingjing was completely bewildered, her almond-shaped eyes filled with confusion: "Brother, what is wavelength? How can light have energy?"

"This..." Jiang Chuan was speechless for a moment, so he had to change the subject, "Jingjing, let's focus on sightseeing for now, I'll teach you these things when I have the chance."

The Great Ming Dynasty, Fengtian Hall.

Zhu Yuanzhang and Empress Ma sat facing each other, enjoying snacks while gazing at the sky.

"Chongba, this thing is truly wondrous!" Empress Ma exclaimed, mesmerized by the underwater wonders. "Not only can it carry people underwater, but the view is also so expansive, almost unobstructed, as if we were sitting in the sea!"

Zhu Yuanzhang nodded slightly, gazing at his beloved daughter's figure in the sky, his eyes filled with envy: "If I could be like Jing'er in this life, sitting in that underwater vessel and personally seeing the bottom of the sea, I would have no regrets even if I died."

"Chongba, why are you envying Jing'er again?" Empress Ma chuckled. "Don't forget, you are the Emperor of the Ming Dynasty. Our Ming Dynasty cannot do without you for a single day."

Zhu Yuanzhang sighed softly and replied, "My lady, I was merely speaking. Now that I have ascended the throne, I will never abandon the people!"

modern.

The submarine continued its silent descent.

The light outside the window grew increasingly somber, gradually transitioning from dark blue to almost pure black, as if plunging into an endless pool of ink.

Only the submarine's own headlights cleaved two beams of snow-white light in front, illuminating this dark world that had been untouched for millions of years.

"Jingjing, look quickly," Lin Xiaoyu said, tapping her fingertip lightly.

Zhu Jingjing held her breath and pressed her small face tightly against the cold porthole.

Where the pillar swept across, a coral jungle suddenly appeared.

The coral wasn't the dull, gray stone she had imagined; instead, it was colorful and varied in shape.

Some stretch out like deer antlers, displaying a bright orange-red color; some resemble giant mushroom caps, glowing with a faint blue-purple fluorescent light; and others look like clusters of blooming sea anemones, their tentacles swaying gently in the water, their tips adorned with pearl-like sparkles.

A golden clownfish with black stripes poked its head out of the anemone, timidly met Zhu Jingjing's gaze for a moment, and then quickly retreated.

"Wow, what a cute fish! Was it looking at me just now?" Zhu Jingjing exclaimed excitedly, never expecting the sea to be like this!

The submarine continued its descent.

The depth gauge showed: 70 meters, 80 meters, 90 meters...

The light almost completely disappeared, leaving only the submarine's lights and the occasional pale blue glow emitted by drifting plankton.

"Brother, what are those?" Zhu Jingjing stared curiously at the eerie blue spots of light, then suddenly shuddered. "Could they be will-o'-the-wisps?"

"Don't talk nonsense, this is all water on the seabed, where would the fire come from!" Jiang Chuan gently tapped her head and explained, "Those are some small jellyfish. The light is from a chemical reaction happening inside their bodies, which is scientifically known as bioluminescence."

The submarine finally reached a depth of 100 meters.

The light shone outwards, and in the distance, a deep underwater cliff could be faintly seen, its steep walls resembling a huge rift extending into a deeper, darker abyss.

Zhu Jingjing gazed at the boundless darkness and suddenly fell silent. "Brother, this world is truly wondrous. I never imagined that such a world could be hidden beneath the sea..."

Jiang Chuan looked at her profile and noticed that in the little princess's eyes, besides surprise, there was also a layer of awe for nature.

The Great Tang Dynasty, Taiji Palace.

The little boy nestled in Li Shimin's arms, his tiny hands clutching his dragon robe tightly, and asked timidly, "Father, could the abyss beneath that sea be the entrance to the underworld?"

Li Shimin gently stroked her hair and comforted her tenderly, "Don't be afraid, Si Zi. Even if the Nine Netherworlds truly exist, they certainly aren't at the bottom of the sea! Otherwise, wouldn't Yama, the King of Hell, be fighting with the Dragon King of the East Sea for territory?"

Little Si chuckled, amused by what he had just done.

"Father, although the bottom of that abyss is somewhat terrifying, the scenery there is truly magnificent." She rested her small face on Li Shimin's chest and looked up at the sky. "One day, I, Sizi, will also want to go and see the bottom of that abyss."

Li Shimin chuckled and hugged her even tighter: "Then you must learn skills from Chunfeng. When you grow up, you will also create such abyss-exploring device, and then we will take your father with us to the bottom of this abyss!"

modern.

When the submarine returned to the cruise ship and felt the light around it, Zhu Jingjing finally breathed a sigh of relief.

She quietly tugged at Jiang Chuan's sleeve, led him aside, and whispered, "Brother, could we try to send this submarine back to the Ming Dynasty? Jingjing thinks we can definitely succeed this time!"