Where each body was rising, setting or overheadat the moment you were born
Nothing in the sky moves. What moves is the horizon. These lines mark the longitudes where a body sat exactly on an angle at your moment of birth.
Traditional Four Pillars needs a sex to read certain positions. It changes the direction of the ten-year pillars and nothing else.
The wheel and every placement, to the minute of arc.
Your four pillars, built from true solar time and the solar-term year boundary. Those are the two places charts disagree.
Two traditions, each read by its own rules so neither borrows from the other: how you are built, what is rare here, the long arc of your years, and the conditions that suit you.