Others practice immortality in order to live forever and ascend to immortality.
Li Tianjiao became an immortal in order to deliver food faster.
A deliveryman who is so poor that he only owns an electric car is bound to the "most powerful delivery system" - others meditate and gain enlightenment, and he thinks about how to grab two more orders every day during the morning rush hour; others practice in seclusion, and he climbs the thirteenth floor to deliver life-saving medicine to pregnant women on a rainy day; others fly with a sword, but he says that thing is not as stable as my electric car.
The system sends him all kinds of weird orders every day: delivering the last bowl of soup to the old lady in the funeral home, rescuing a high school student who was beaten up at a convenience store late at night, and taking down a demon cultivator base along the way.
The rewards are also very generous: spiritual power multiplying pills, golden bells, automatic cultivation passives... All are good things that the big guys in the world of immortality will never be able to touch after a lifetime of cultivation.
But Li Tianjiao only cares about one thing: if the order is overdue, the money will be deducted.