Sounds good to me, I'm really fond of that idea! I think ideally Zhongli would be very incognito in his position as the head of the underworld organization, since a lot of the fun there would come from Childe not knowing that he's anything beyond the kind of pretty face, knows a lot about history, but lacks common sense guy he seems to be on streams.

When I was writing down the idea I was really undecided on if it'd be more fun for Childe to have any connection or not to the underworld or just be a regular, albeit very famous guy, so I'd love to hear your thoughts there... Thinking about it a bit more, it might be a lot of fun shenanigans for Childe to have to deal with all of Zhongli's mafia weirdness while being a normal dude, albeit one who adapts very quickly. But Childe having his own sidejob does line up with canon more and I'm cool to go with what you think would be more fun, too! Let me know your thoughts on this and any other things you'd like to see out of the PSL.