Relief that he understands. Has felt (briefly) for himself, back when he'd first arrived. And he'd have helped Beiyuan wile away his time, had Wu Xi vanished. But it's unnecessary.

Zishu sighs at the embrace, leaning into it and hugs back with another soft smile. "I'm well thanks to Wu Xi, Lao Wen, and Xiao Xingchen. And of course I've been looking after yours." Making Wu Xi sleep, obviously. "We've been drinking through your stash of wine," this comes with a smirk.