We need a fanfic where ye zimu meats his older self and just assumes he was sent here by some villain and "of course you can stay with us, Auntie will not mind!!! We can say you're my cousin who came here to check up on me after I left dad or something"
And at first ling cheng is like "oh heck no!" But then he realizes he might be able to get rid of ye zimu this way and send him off with his "cousin" so he agrees.
Cue found family with this dynamic:
And younger Ye Zimu is super excited to work on his powers with his older self while the sweet (a bit weary, protective aunt at first but got warmed up soon) aunt is just cooking for her boys and being wholesome:










