System: I am a second-hand dealer in the world of immortality

Introduction: "Ding~ Second-hand dealer system, small investment, big returns, reach the pinnacle of life, marry a rich and handsome man!" Shen Xia traveled through time, and was still in the world of cultivating immortals, but why was Mao himself a poor and poor mortal with no spiritual power? It doesn't matter, the world is uncertain, you and I are both dark horses, we still have a system, relying on the system to make a comeback is not a problem! Eh? Why is this system so unfair? What is wild vegetable wowotou? What is mugwort family bucket? What the hell kind of missions are they all? I honestly saved money to enter the sect, but wait, why does the sect have so many classes, just like the university? Are you here to cultivate immortality or to take classes? Do you still need to take the final assessment? ?It’s okay, climb up, it’s OK