A Substitute Angel for Mortals to Cultivate Immortality

What? Are we divine envoys? We still need to look up the Immortal Emperor, Heavenly Emperor, Daozu, and Heavenly Lord, but we are only in the Golden Core stage... A story-telling-style fan novel about immortality. Two male protagonists accidentally become immortal cultivators while traveling, and discover that there is actually a hidden world of immortal cultivators hidden in the real world. After a confused and random operation, the two accidentally become substitute angels, and have shaken up the entire world of immortality. This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.