Any chinese or chinese-speaking people that can help me with my writing?

Hiya, I'm a fiction writer and one of my characters from the fic I'm currently writing is of Chinese descent, except I only have a vague idea about Chinese culture and language┗( T﹏T )┛

My character is a charming young man who is popular with the neighborhood aunties and grandmas. I found out that the Chinese for Auntie is "Āyí" but I have no idea what those aunties would call him in turn. Can anyone tell me? Maybe something like nephew or young man, but an affectionate term for it? I'd appreciate the help!