For example, Beijingers like to call girls "girls", so what do Sichuanese call them?

A general term for young girls: "beauty"

The relationship between girls and girls can be called "dear"

Sichuan girls don't like being called "miss";

When calling "little sister", it depends. Sometimes the waiter in the restaurant is also called "Little Sister".

When you are not the youngest in the family, but much older than her, you can also be called "little sister" or "* * (nickname) little sister"