Vol 4: Ch 282 - What parents are?
After Wei An and Bum leave the hospital they ask about where the kids are right now then react when they heard that it's come from Mei instead of the one who has contact number with the little boy. Yeah, the Din's Family Members are now conversing in Ceno and almost forgot that Jun's Family Members are still in the room.
El: And how did you know his number, huh?
Mei: [Pretending not to know anything] eh, what are you talking about Bro El?
El: You've been texting from your phone so it must be from Jinyu boy since you know where's the kids right now, right?
Mei: Ha, ha, ha, and since when did you see me asking him his number Bro El?
El: I didn't see it personally but then knowing you, I guess you must ask him in secret, or rather it's between Ken and Ren telling your number to him since you know where the kids are.