soph_sol, 
Celestial Confluence/Cultivation Cross, by pengiesama
https://archiveofourown.org/works/18333068
a silly funny fic about hua cheng causing chaos in heaven by creating a trendy new gacha game
xie lian, bewildered, ends up on shi qingxuan and ming yi's livestream about the game
hua cheng is absolutely willing to get distracted from the game by gege
there's some excellent comic timing in here!
6k words in length