If Your Life Is Gone, How Can You Become an Immortal?

Fang Ping accidentally traveled through time and awakened the "lifespan exchange system". He can exchange his lifespan to obtain skills, magical powers, and temporarily improve his cultivation level. I wanted to show off my talents, but my life was in danger when I came out... In the early stage, under the control of others, undercover the immortal sect, every step was dangerous. I saw him say: "If one day the dream of an immortal comes true, who dares to laugh at the shame of the future?" ........... (Mortals flow, gou, and kill decisively)