"This scenario only exists in quantum mechanics, not in classical mechanics. Imagine two distant bells: touch one from one end of the universe, and the other instantly rings with the opposite tone."

"So... how does that relate to the changes I described?" Qin Yi was still a bit confused.

"Don't you think this resembles quantum entanglement?"

Li Jianwen turned on speakerphone, set the phone on the table, and explained while using the toilet. "That kid somehow got quantum-entangled with a mother cat. At first, they were in an eigenstate—each quantum alternately showing partial traits. Now, they're shifting toward superposition."

"Superposition? What will she finally become?"

"No idea. Normally, it's a gradual process. As the particles couple, superposition evolves from unstable to stable, revealing different blended traits over time until equilibrium. Then, the stable superposition settles, allowing observation."

"Can you dumb it down?" The jargon gave Qin Yi a headache.

"Ever read web novels?" Li Jianwen pulled up his pants and flushed the toilet.

"A little."

"You know those stories where someone transmigrates to another world and fuses with another soul? Think like that. But in novels, it's just souls merging. Yours is particle-level fusion—probabilistic overlap."

"The cat and child will gradually fuse. During fusion, it's unstable; any trait might surface. Once complete, merged parts stay, vanished parts disappear, leaving one stable entity—the steady superposition."

"Then... what decides who dominates the fusion?"

"Who knows? Maybe entropy increase. Maybe Schrödinger's cat." Li Jianwen washed his hands, glanced at the dryer, then at the speakerphone. He dried his palms with paper towels instead.

"I see... How long until fusion ends?" Qin Yi asked his last question.

"It depends on sleep. You said the kid changes after each nap, right? I think she's her own observer. Losing consciousness each time pushes superposition closer to stability."

"Hmm... I get it. Thanks, Brother Jianwen. I'll treat you to a meal next time."

"Pfft... Kid, you're treating me? Where's your cash? Using Grandpa's allowance? I can't accept that." Li Jianwen laughed, pushing open the restroom door. He checked his phone battery—77%. Enough to read a few xianxia chapters on the bus back.

"Excuse me... Are you Professor Li?"

A clear, feminine voice suddenly sounded behind him, laced with hesitant delight.

Li Jianwen froze. This was supposed to be the men's locker room—why a woman's voice?

He took a deep breath and scanned the area. It seemed... probably... definitely not the changing room he'd entered.

These racks of women's clothing...

Li Jianwen numbly hung up, feeling his lifelong reputation crumbling in this small hospital.