Well, again coming from a "female choice" perspective, young Chinese women are striving to have careers (or at least fun) before starting a family. They are being told to do this, and most people conform to expectations. (Choice doesn't mean fully independent first-principles decision making.)

The rhetoric is still about "increasing female labor force participation".[1]

For clarity, the thing you do first is your priority. This is known as "revealed preference" in economics. And careers are individual things, not collective.

Also for background, fertility declines secularly from mid-teens to mid forties where it goes to zero. Waiting has two costs: you have fewer years in which to have children, and you are less likely to have them in each year. (There is a third one in increased risk of congenital illness in the child too.) Nearly every woman knows these things.

1. https://thechinaproject.com/2022/03/08/women-at-work-in-chin...