Duan Ling Tian still remembered the words Elder Huo had said back then. Elder Huo had used these words to describe the difference between a large and small mundane realm. "Generally, there are two types of mundane realms. One of them is similar to the world in your past life. They consist of planets and galaxies and are extremely vast. They're inhabited by all kinds of living things. The Devata Realms' Celestials know them as large mundane realms… The mundane realm we're in is considered a small mundane realm. As you know, this mundane realm has the Dao Martial Saint Land, the Mortal Continents, and the sea. It has relatively fewer living species."
The Beyond Heaven Secret Zone was linked to five mundane realms. Apart from the Saint Province Realm that was a small mundane realm, the other four mundane realms were big mundane realms. One of the big mundane realms was also where Duan Ling Tian's home planet in his past life was located.