C775 Winds of the Perseus Arm(1)

Chu Tian was located at the head of the shield's spiral arm, next to Qi Ya, Boru, and Yin Nan. The border between Chu Tian and Qi Ya was three thousand light years long. The border between Boru and Chu Tian was one thousand light years long. The border between Chu Tian and Yin Nan was only a hundred light years long.

A hundred light years was still short? This was an astronomical unit