
Somebody pls correct me if im wrong cuz older chapters are forgotten in my head and i dont want to reread xD but isnt the black haired guy lin fan’s uncle?????

Shizi isn't Lin Fan's uncle. They are just friends. Shizi calls Lin Fan's dad brother as a sign of respect because the dad is older than him. I actually guess Shizi called him older brother instead of just brother and it just got lost in the translation. Instead of Mr. And Mrs. or Sir, Ma'am, in most Asian countries, if you're close enough as friends, younger people call the older ones, older brother or older sister, or aunt or uncle (if they're significantly older).
OMG THE COMMENT SECTION REALLY IS BACK, ACTUAL EONS
AND I LIKE THE SPOILER WARNING TAG, GOOD UPDATE