After Binding to the Child-Rearing System, I Saved My Parents

Yun Zhiyu’s parents disappeared while traveling by plane. Just then, a System binds itself to Yun Zhiyu and tells her that if she bears children for the Chosen Ones in three thousand small worlds and earns enough points, she can buy a high-level time-reversal item and return to the past to save her parents. So Yun Zhiyu, who has been single for eighteen years, enters the three thousand small worlds... Ancient times, the modern era, the martial world, the beast world, different historical periods... At last, she saves her parents! (No fixed CP)