Susu gave Jiang Chen a simple introduction to the universe. Jiang Chen learned that the Demon Realm was one of the most powerful planets in the universe. It was located an immense distance from Earth.
"Calculating by light-years," Susu said, "the Demon Realm is three hundred million light-years away from Earth."
As a human from Earth, Jiang Chen had a concept of what a light-year was—the distance light travels in a year.
Chapter 1227