The Almighty Tycoon: The More Outrageous the Missions, the More Invincible I Become

Ye Feng transmigrates as the adopted son of a wealthy family. The day the real young master returns, he is told to pack his things and get out. Luckily, he activates a System that rewards him for completing tasks. He decisively leaves and goes home with his biological parents, using the System to make a spectacular comeback and become an all-around tycoon. [Multiple female leads. The blurb doesn't do it justice, so please check out the novel itself.]