Breaking the rules for him. Such a good sister! He looks around her little room, approving of her experiments (though it doesn't translate to his expression so much in how he doesn't give a dismissive snort).

"I'm sure you'll figure it out," it sounds like a lame praise. And from anyone else, it would be. Idle chatter to indicate paying attention. But this is Xue Yang, who isn't used to praising anyone for skills not in the battlefield or in acting.

"If there's a way to get you back, we'll find it." He'd promised, after all. And he hasn't forgotten it.