Ren Zu, potential transmigrator?

I think it's interesting. Knowing the existence of other worlds, and also knowing that new beings simply cannot spawn out of nowhere, I think it's likely that Ren Zu originated from another world.

The history of all beings is unknown (atleast to my knowledge), but it makes sense that all variant humans have come to existence through evolution from the first biological life forms in the Gu world. We know however that humans are the only special beings in the Gu world, as they are the only ones that can originate from another world, and also transcend to venerable. So would it not make sense that Ren Zu was not a product of evolution, but just an entirely new being spawned from another world?

Probably a stretch tho