An AU that could be very fun to make is a time travel/fix-it Bingjiu with a small, tiny, inconsequential twist :)
What if Luo Bingge goes back in time (perhaps after seeing Shen Yuan and his pathetic husband Luo Bingmei) and think "I want that too! I want that soft, kind shizun too! Why him and not me?!" And at first, the timeline stays exactly the same. Shen Qingqiu is horrible, he's a lecher and a killer and deserves to suffer from that (+plus casting Bingge in the abyss)
And then an idea worms into Bingge's head (by the power of delulu I gift upon him) that maybe Shen Qingqiu is so horrible to him is because he's also going back in time and trying to stop Luo Binghe from ever becoming such a monster... in the only way he knows, which is to punish and beat and throw into an Endless Abyss rift, a self-fulfilling prophecy.
Then because Shen doesn't show signs of actually remembering the previous "loop", Luo Binghe starts to think that maybe Shen Qingqiu doesn't come from the future like him each time, but he sees the future, of what would be the world if he let Luo Binghe live.
And that should ring some bells of doubt too because it does not explain much or why Shen Qingqiu hurts him and not kill him if it's to spare the world of who he will become (and why kill Liu Qingge, who had a decent chance of fighting and winning against Bingge?) But the power of delulu is strong when Luo Binghe has been going back to the same time, punishment and misery as his disciple time and he gets into his head that maybe, maybe Shen Qingqiu is so horrible to him is not because he's a petty, viciously jealous man but because he cannot show favoritism or special treatment to a student (nevermind all that's happening with Ning Yingying) and Shen Qingqiu is fighting against the whole cultivation world to be with Binghe from the beginning.
So Luo Binghe starts... acclimating... Shen Qingqiu from disciple time to have a sticky, faithful, always present and obedient little sheep (bro is so confused but Bingge has been seducing and manipulating for so long now it's easy to twist his bitter, angry teacher into someone that's more akin to a hurt feral cat just hissing at the world because he cannot trust anyone but the kind hand that still choose him over and over again)
And at the end, they're together, happy as can be and both their wishes are fulfilled (Bingge to have his kind shizun, and Shen Qingqiu to be in a position of power where he wouldn't have to struggle ever again with someone that would never break a promise 💚)









