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Additionally, since there exists a "Dao Mark" that acts as a coordinate to guide the retirement of the Heavenly Dao, it goes without saying...
"Most predecessors of the Heavenly Dao, after stepping down, haven't thoroughly collapsed and vanished. Instead, did they enter a place not part of the 'myriad realms' where they can't interfere with the main world, or did they go into a state of hibernation?" Song Shuhang speculated.
If there's a return, then surely there must be a 'place from which to leave.'
Moreover, if even the Heavenly Dao, endowed with extraordinary talents, needs a 'coordinate' to have a chance to return to the main world—that would mean their location is cut off from the world, rendering not even the Heavenly Dao capable of pinpointing the main world directly from there?