Longevity: I Have a Lotus of Enlightenment

[Traditional, slow-paced, mortal-centric story, no system panel] Chen Xuan was reincarnated with a painting of withered lotus. At midnight, the withered lotus absorbs moonlight, condensing into Enlightenment Dew, which can temporarily enhance comprehension. The path to immortality is arduous, and achieving immortality is difficult. Starting as a menial servant, Chen Xuan proceeds step by step, steadily and surely, until he reaches the pinnacle of immortality.