Immortal仙
xiān
A being who has transcended mortality through cultivation; less a god than a graduated human, with bureaucracy to match.
The xian of Daoist legend are humans (occasionally animals) who perfected themselves into transcendence: they ride cranes, live in grotto-heavens, and answer to a celestial administration that mirrors an imperial court. Fiction keeps the ladder structure; "immortal" is usually not the end of progression but a new bracket with its own ranks, from earth immortals up through golden immortals and beyond.
Donghua leans on both the majesty and the comedy of the concept. Heaven Official's Blessing treats heaven as a literal civil service with office politics, while xianxia sagas frame immortality as the distant summit justifying millennia of cultivation. The character 仙 itself, a person beside a mountain, is the genre's whole premise in one glyph.