The silver-purple light of the space-time tunnel had barely faded when Lin Yue coughed from the smoke that gushed in her face. She stumbled, grasping the mottled city wall, the rough brickwork rubbing against her palms. Looking down, she realized she was wearing a dark, formal outfit, and the thing hanging from her waist wasn't a jade pendant, but a bronze dagger engraved with topological patterns. A calico cat, its fur ruffled, crouched on her shoulder, its gear-like eyes glowing red in the twilight. "Warning! Lin'an City, dating from the transition period between the Song and Yuan dynasties, detected. The space-time anchor point... is within the ink painting!"

"Ayue!" A familiar voice, laced with a sharp sword aura, struck. Lin Yue instinctively leaned back as Lu Li's longsword brushed past her ear, severing a black feathered arrow that had streaked through the air. His moon-white suit was stained with blood, his hairband long gone, yet faint streams of silver-purple data swirled through his tousled black hair. At that moment, he looked like a general straight out of a painting of an ancient battlefield.

"What's his identity this time?" Lin Yue tumbled to avoid the flying debris, the threads of time transforming into chains that entangled the collapsed beams. A calico cat popped up a holographic projection, revealing the Song Dynasty painting "A Thousand Miles of Rivers and Mountains" strangely distorting. The once turquoise mountains oozed black code: "A space-time virus has been detected disguised as an ancient painting. If the painting turns completely black... the memory of an entire era of civilization will be formatted!"

Lu Li swung his sword, cutting off another wave of black-clad assassins. The silver-purple light pattern on the sword echoed with Lin Yue's time thread: "Just now at the city gate, I saw the shadow of Miss Wang." His voice was mixed with the sound of metal clashing, "This time, she has transformed into a military advisor for the Yuan army. The wolf hair brush in her hand... can turn ink into a sharp blade of data." Before he finished speaking, a dense rain of ink suddenly fell from the sky, and each raindrop that hit the ground turned into a ferocious mechanical beast.

Lin Yue tore off her skirt and wrapped it around the hilt. Threads of time flowed down the blade, stained the bronze dagger a golden red. She rushed toward the nearest mechanical beast, its inky body disintegrating into flickering binary characters wherever the blade passed. Out of the corner of her eye, she saw Lu Li surrounded by several mechanical beasts. Silver-purple code streamed around him, forming a protective net, but at a certain moment, a tiny crack appeared. Miss Wang had appeared on the city wall at some point, and the thick ink from her wolf-brush brush had condensed into a cage of hyper-dimensional code.

"Use our resonant frequency... to redraw the mountains and rivers!" Lu Li's voice cut through the din of the battlefield. Lin Yue understood, and the thread of time shot like a startled dragon towards the palace where "A Thousand Miles of Rivers and Mountains" resided. The moment the thread touched the scroll, her consciousness was suddenly drawn into the world within: Fragmented quantum codes drifted amidst the verdant landscape, black cracks dotted the otherwise picturesque mountain ranges. At the heart of the scroll, Miss Wang was injecting malicious data into the ink-wash architecture representing Lin'an City.

"The romance of these low-dimensional civilizations is nothing but a failed experiment in super-omnidimensional consciousness!" A strange smile broke across Miss Wang's mechanical face. With a wave of her wolf hair, countless black dragons pounced, their fangs bared and claws bared. Lin Yue's thread of time tangled with the black dragons, yet she felt her power steadily draining away. At the critical moment, Lu Li broke the seal and burst into the painting. His code stream transformed into a silver whip, shattering the black dragons while weaving a massive Möbius strip across the painting.

"Remember the Xuanji Tu from the Eastern Jin Dynasty?" Lu Li grabbed Lin Yue's wrist, and the moment their palms touched, golden, red, silver and purple light shone brightly. "This time... we have to rewrite the source code of this painting!" Their consciousness sank deep into the scroll, and they saw the real painters in the long river of history writing on the rice paper, while in the tampered time and space, malicious data was trying to cover those painstaking brushstrokes.

Lin Yue's thread of time became a nimble paintbrush, while Lu Li's stream of code became a never-fading pigment. They moved along the veins of the scroll, infusing the ink with a resonant frequency of 143.8 Hz: causing the shattered mountains to rise again, the parched rivers to flow again, and the lights of Lin'an City to rekindle. When the last black crack was repaired, Miss Wang let out a piercing scream, her mechanical body disintegrating into scattered ink dots, completely consumed by the scroll.

The real Lin'an City suddenly lit up with a brilliant light. "A Thousand Miles of Rivers and Mountains" regained its former vitality, and the green landscape in the painting even shimmered with a quantum luster. Lin Yue and Lu Li slumped down on the city wall, watching the war gradually subside and the people come out of their homes and cheer. The calico cat brought back half a piece of osmanthus cake that it had found from nowhere, and its mechanical claws poked the cake into the shape of a super-dimensional code: "Spacetime repair detected! But Song Dynasty pastries... are sweeter than those from the Tang and Eastern Jin Dynasties!"

Lu Li smiled, took the cake, and broke it in half. The silver-purple code gently held the crumbs together, preventing them from falling. "Next time I travel through time, I'll definitely take you to the real Jianghu." His fingertips brushed across Lin Yue's bloodied cheek, and the code flow instantly healed the wound where it passed. "Instead of always having you follow me and fight your way through the chaos of time and space."

Lin Yue bit down on the sweet, sticky pastry, the thread of time playfully tucking his scattered hair. "But I feel that no matter which time and space, as long as I'm with you..." Her words were interrupted by a sudden explosion of fireworks. The fireworks rising from the direction of the Song Palace formed a Möbius strip in the sky. "It's the most romantic world."

Under the dazzling fireworks, their intertwined shadows gradually overlapped with the ancient totem on the city wall. A calico cat crouched nearby, silently recording the scene with the remains of its collar—after all, every romantic moment in the hyper-dimensional universe deserves to be encoded into eternal code.