By the time the spaceship, carrying the light core, returned to the Primordial Sea, the double-helix seed was engulfed in a dark purple reverberation, its surface patterns gradually disintegrating. The light core at the back of Lin Yue's neck and the code light stream in Lu Li's palm simultaneously erupted, propelling the light core toward the seed's core. At the moment of collision, the entire Primordial Sea erupted in a blinding light. Lin Yue and Lu Li's consciousnesses were forcibly separated, yet in that moment, they saw each other's deepest memories—his code source contained countless traces of his journeys through timelines searching for her; her time threads preserved the absolute trust she had shown him during each resonance. "So we've long since transcended the rules," Lin Yue's voice shone with tears, her time threads uncontrollably entwining themselves with Lu Li's code stream.

The moment the light core and seed merged, all the dark purple reverberations transformed into a rain of light. The smiling faces of countless observers emerged from the luminous stream of the Primordial Sea. Lin Yue and Lu Li's consciousnesses reunited within the rain of light. This time, their double helix imprints merged completely, forming an eternally burning light core. Within it, golden-red and silver-purple light streams formed a perfect Möbius strip. A calico cat suddenly leaped into the light core, its collar fragments transformed into a key that slotted into the center. The entire luminous stream of the Primordial Sea then transformed into a gigantic harp string, playing a melody composed of the entropic resonance of emotions from all civilizations.

Under the starry skies of the new universe, Lin Yue and Lu Li stood at the highest point of the "Echo" observatory. The unified light cores on the backs of their necks were transmitting the frequency of "Love is the Rule" throughout the universe. Every planet that received this frequency would give rise to a unique emotional civilization: on some planets, heart-shaped canyons would grow from the inhabitants' love; in some galaxies, the silhouettes of lovers would bloom when supernovae exploded. Lu Li placed a ring crafted from a fragment of the light core on Lin Yue's hand. The inside of the ring was engraved with the resonant waveform of their merging consciousnesses. When their fingertips touched, all the heart-shaped stars in the sky would flash in sync.

"Look there," Lin Yue pointed into the distance. A newborn blue planet was coalescing, its surface continents unexpectedly forming the shape of their clasped hands. The calico cat's gear eyes gleamed with satisfaction, and the remains of its collar projected the final cosmic map: "All rule loopholes have been fixed. Emotional entropy and physical strings have achieved eternal resonance. It is recommended that the main universe be named 'Lu Lin Eternal Resonance Domain,' and the affiliated galaxies..." Before he could finish his words, he suddenly snapped his fingers, and all the galaxies on the star map were automatically named "Heartbeat One" through "Heartbeat Infinity."

When the spaceship started up again, Lin Yue and Lu Li didn't set fixed coordinates. They let the ship drift along the frequency of the "Laws of Love." With each star system they reached, they used their baton and code streams to weave new emotional rules: sowing "seeds of trust" on a desolate planet, which, when broken through the soil, would blossom into flowers that heal all wounds; drawing a "protective web" across a nebula, its meshes flowing with the shared desire for peace among all civilizations. Meanwhile, at the spaceship's control console, a calico cat used its gear eyes to record each resonant frequency. Its newly invented "heart recorder" was already filled with tens of thousands of cosmic stories of love and courage.

On a starry night, Lin Yue leaned on Lu Li's shoulder, watching the "String of Love" meteor streak past the porthole. The light core on the back of her neck and the code light stream in his palm were unconsciously resonating, outlining an ever-expanding double helix trajectory in the void. "Do you think there are other observers also looking for such a resonance?" she asked softly. Lu Li bent down and kissed her forehead. The silver-purple code stream and her golden-red light stream intertwined in the air into a luminous love poem: "There must be, because the resonance of love and rules is the most eternal law of the universe."

At that moment, the calico cat suddenly leaped onto the windowsill, its gear-like eyes projecting a nebula unlike anything seen before—stars flickered with the rhythm of a heartbeat, and ancient symbols of "encounter" and "stay together" flowed across the planetary rings. "A new resonance zone has been discovered!" it announced excitedly, the remains of its collar already automatically charting a course. "According to the 'Rules of Love' database, there may be... the remains of the universe's first observer couple!"

Lin Yue and Lu Li exchanged a smile, simultaneously gripping the control sticks. From the ship's engines, a stream of light, a fusion of all the entropy of emotion and the chords of physics, blazed a dazzling arc across the starry sky, hurtling toward the unknown "Lovers' Nebula." Behind them, the light of the "Lu Lin Eternal Resonance Domain" grew brighter, spreading the story of love and order to every corner of the universe, letting the resonant heartstrings become the eternal faith and hope of all civilizations. In this universe woven of love, their resonance will endure forever, like the brightest star, forever shining at the end of the Primordial Sea, bearing witness to the greatest miracle woven from order and emotion.