Qingran isn't at all scared of the Ghost House. With the flickering lights inside, she's even thinking about which circuits must be connected to cause this phenomenon.
She's not afraid, and Xie Ying'an, the calm one, is even less scared.
A 'woo woo' sound, like crying mixed with the wind, catches Qingran's attention and she listens intently.
Xie Ying'an doesn't understand, just observes her actions.
"Listen," Qingran signals him to listen to the wind, "Didn't our physics teacher explain the principle behind this sound last time?"
Xie Ying'an: "…"
Stunned for a moment, Xie Ying'an quickly recovers: "Yes, we did learn about it, it's just..."
A white shadow whizzes past them, followed by a familiar male scream from outside.
Xie Ying'an's previous words are interrupted, and upon hearing the sound, Qingran's eyes light up with amusement: "That's your brother's voice."
Typical!