The immortal world has flourished for millennia, yet immortal positions are fixed, and low-level cultivators lack cultivation resources and have no hope of advancement. As a low-level cultivator, Su Xing can't find an immortal partner, can't afford a cave dwelling, and has to work hard in the spirit medicine garden every day just to make ends meet. Looking at the remaining 10 days of his lifespan, Su Xing finally snaps. Since his transmigration, he has spent almost all his wages on buying lifespan medicine, but even so, his lifespan is still decreasing! Because he's out of money! One day, Su Xing uses his past life's knowledge to try to analyze the formula for lifespan medicine...