Era background: 1912-1949, the chaotic times of the Republic of China, with warlords separatist rule, foreign invaders invading, foreign religions coming from the east, Taoism declining, spiritual energy thinning, evil spirits running rampant, and secret techniques lost.
Protagonist setting: Chen Qingxuan, born in the Yuanyou period of the Northern Song Dynasty, an immortal who has lived for nearly a thousand years. He cannot fly to the sky or escape from the earth, but he has an immortal body, immunity to time, full memory, and omniscience of Taoism. The body can heal itself, will not age, will not die of illness, and will only die if the soul is destroyed by the ultimate mystical art/magic weapon.
The secret of immortality: Carrying the fragments of the ancient "Lan of Immortality", he used the remaining energy of heaven and earth to survive, hiding in the world, and changed dynasties countless times, always hiding in the market as a "doctor, gentleman, and hermit".
