"Your thing about using solar energy to give off light and heat sounds familiar. I've done that before, too," the Everlasting Immortal Fairy said cheerfully on the way back, stretching lazily.
She'd been cultivating by sleeping in bed to recover her strength. Now that she'd woken up, it meant her cultivation had temporarily come to a halt.
"Sleep well, Immortal Fairy. Did you use solar energy in ancient times, too?"
"I've never heard of solar energy, but I imagine the way it works is about the same."
"How did you use it?"
"There was a time when I really liked reading. I'd read during the day, then keep reading at night. Though my eyesight is excellent and I can see clearly even in the dark, it just doesn't have the right atmosphere."
"So I invited a Golden Crow over. I had it conserve its energy during the day and not shine, then make it shine at night to light the place for me. I'm telling you, it was as bright as daytime."
"Sometimes, when the fire wasn't hot enough for cooking, I'd invite a Golden Crow over to blow on it and heat things up. Of course, I wouldn't make it help for free. I'd always let it stay for a meal."
"...I don't think using the sun's power to give off light and heat is quite the same thing as what we're talking about."
"Really? I think it's pretty much the same. Look, didn't I store up the sun's power first?"
"Yes."
"And then release the sun's power after storing it?"
"Yes."
The Everlasting Immortal Fairy clapped her hands. "There you go! It's exactly the same."
Lu Yang patiently explained the difference to the Everlasting Immortal Fairy. "The solar energy I'm talking about can do more than give off