The difference between women who have cultivated and those who haven't is the richness of their primal yin, and it's not necessarily the case that the longer the time, the richer the primal yin becomes.
After the age of twenty-four,
a woman's body reaches a relatively high peak time, which varies from person to person. For some, it's merely five or six years, for some ten years, or even longer.
And for women who cultivate, it lasts even longer...
Su Yi has also cultivated, but she grew up in a family of civil officials, practicing nothing more than flowery and showy martial arts, which could be said to be with no cultivation at all. Her combat ability is even inferior to that of an ordinary adult man.
She only maintained her current state because she was born into a wealthy official family, enjoying a life of luxury and never suffering hardships.
