Nannan is not a dialect word, which is generally used to address girls, meaning little baby, and also belongs to the ambiguous address between male and female lovers. If a boy calls you a little darling, it means that the boy likes you very much and wants to treat you as a baby. This is also an intimate title. If you call him a little darling, it is also a relatively happy thing.
The boy corresponding to little darling is called little darling, which is generally a nickname for his son and also means baby, so girls can call boys this way, which shows that the relationship between two people is ambiguous and intimate, so little darling and little darling are a kind of lovers' names. Lovers in love,
Lovers in love have many names. You can choose according to your own habits, or you can choose a unique name to express your unique love for each other.