Confucianism: Become an Immortal with a Single Stroke

[Confucian Dao + imperial examinations + demons + alternate world + manifested literary talent + expansive worldbuilding + slow burn] Lin Mu, a librarian, accidentally transmigrates to a world ravaged by demons, where the Confucian Dao coexists with supernatural powers. He wields poetry as a sword and prose as a spear, vowing to carve out an age of peace and prosperity. In the halls of power, he will pacify the demon tribes in the north and suppress witches and fiends in the south, save the crumbling empire, and rescue the people from danger. In seclusion among the martial world, he will sweep away the monsters of the cultivation realm and bring order to the Three Realms and Six Paths, becoming an immortal with a single stroke and living free and carefree.