This would greatly boost Lu Wufei's reputation among the Demon Clan's upper echelons, and it would be an absolutely positive reputation.
Even though he has already gained prestige as a Wuzhuang Temple disciple and a favored disciple of Immortal Zhenyuan.
But Lu Wufei has never thought of completely abandoning his identity as a member of the Demon Clan, just like when he founded the City of Ten Thousand Demons, he plans to turn his Demon Clan identity into a future reliance.
He now has enough power, and pretty much enough fame, what he lacks is the recognition from the Demon Clan in the world, especially from the upper echelons.
Because his Wuzhuang Temple identity is far too prominent.
He doesn't want the various demons to hold a stronger impression of him as a Wuzhuang Temple disciple over his identity as a member of the Demon Clan and the King of the City of Ten Thousand Demons.