"I haven't found the entrance or exit to the Mustard World. Perhaps, it was through this entrance that the Demon Star left Nanxun Kingdom and entered the Cultivation World years ago...
The Gu Refining Cultivator might have discovered this entrance and used it to come here."
With these thoughts in mind, Chen Dengming seemed to sense the secret about Nanxun on the horizon.
"I discovered the body of the cultivator more than fifty years ago."
The Five Sects came to know about the shards of this Dao Orthodoxy, the Nanxun, only after their encounter with the Demon Star hundred years ago, and had dispatched people here as far back as then.
Therefore, it's highly likely that this Gu Refining Cultivator didn't arrive in Nanxun through the Five Sects' transfer formation."
After arriving, did he use up his Spiritual Energy too quickly, lost his cultivation, and eventually met his end? If so, the vicinity of his whereabouts at that time might actually be an entrance to Nanxun..."