Au where Shang Qinghua wrote what he remembered of D&D books into the world of PIDW when he's an outer disciple with more time. Its popular on An Ding for a while before he gets too busy to dm for it and it slowly disappears.
One day some An Ding disciples comes across his old book and goes to him to ask
"Shizun, this game you made... Could you maybe be a dungeon master for some of us...? We're really interested in it!"
Shang Qinghua, who forgot all about it, stares with wide eyes at the book before eagerly snatching it up and agreeing. Of course your shizun will! He hasn't seen this manual in years!! He'll schedule something :D!
A few months later, Shen Qingqiu wanders onto An Ding to chat with Shang Qinghua about something but pauses when he reaches one of the courtyards and hears something.
Getting a little closer, he sees and watches Shang Qinghua, with a group of his little ducklings, eagerly narrating an important story beat, using dramatic voices and hand gestures while he interacts with their characters.
He watches from afar curiously, listening to the story and the voices his strange shidi uses.
Shen Qingqiu wants that. He wants to play that strange game his shidi apparently made. But he doesn't know how to ask. Nor does he believe he'd be allowed to.
But maybe Shang Qinghua notices him when they're finished.
"Ah-! Shen-shixiong how long have you been... Watching me?" He gets embarrassed.
"This shixiong did not know Shidi had time for games." Shen Qingqiu raises a brow over his fan and Shang Qinghua laughs nervously.
"Ah this shidi was just-"
"Hm, shidi needn't get nervous. He is not in trouble with this shixiong, he was simply... Curious about the game."
"Huh? Oh! Shen-shixiong, would you... Like to play with me sometime? Maybe we could gather some hall masters, or other peak lords, or we could go down the mountian to-" He clears his throat. "Or yknow- however you'd be comfortable."
Something something eventually they end up playing with the Jiejie's at the Warm Red Pavilion, with Shang Qinghua once again eagerly doing voices and telling the story, and Shen Qingqiu biting his lip in anger as he realizes he might be falling for his shidi.