The mystery of the main world's true name.

Normally, the names of the worlds reflect the nature of the world Xie Yan visits. For example, Tong Ling's world means "Communication with Spirits" or "Shaman"; Ba Quan literally means "Dominant Fist". Jin Zhou means "Forbidden Spells", but the true name of the main world is still a mystery, and I doubt that its true name is "main world". The only clue we have is that it cultivates true qi and is the highest world, and this is perhaps related to its true name.