This is a form of etiquette, as well as an expression of a strict hierarchical society.
"There's no need for formalities! Please take a seat, Miss Ye Ji!"
Qin Niu could tell from her voice that she was probably not very old, perhaps around thirty or so.
However, judging a woman's age solely by her voice and figure was definitely not precise, especially in a world where everyone could cultivate. Some cultivators with high levels of skill, even if they had lived for two or three hundred years, might still look very young.
It was said that some exceptionally talented Immortal Masters could maintain a youthful appearance nearly indefinitely if they reached the Immortal Master level in their twenties or thirties.
The law of aging seemed to be nonexistent for them.
The footwork Ye Ji had just demonstrated was at least at the level of the Innate Realm.
Her real age was truly unpredictable.