From the LYF fan event, I believe.
https://twitter.com/tiff_ilosophy/status/1698689666982330740?s=20
q: how would xiang liu confess to xiao yao vs. how fangfeng bei would confess to xiao yao?
#TanJianci: fangfeng bei is confessing to xiao yao at all times. xiang liu might need to confess via fur ball, hang a present or love letter on a fur ball, and fly it to xiao yao's side.
We have found the main obstacle betwee XY / XL. It's CHUBBY! He ate all those presents and love letters from XL!