The Fuxi star map is over 6,000 years old, and it's from a neolithic tomb in ancient China.

伏羲星图已有6000多年的历史，它来自中国一座新石器时代的古墓。

But, for reasons unknown, the Ringworld had disappeared from the star maps.

但是，由于未知的原因，环形世界从星图上消失了。