A Record of a Mortal's Journey to Immortality: I Spread the Purple-Gold Demonic Path

[A fanfiction based on A Record of a Mortal's Journey to Immortality, with smart characters, a focus on plausibility, no resource cheats, founding a sect, multiple female leads, combining the original novel and anime, and some original additions]

Overworked office drone Jiang Li transmigrates into the world of A Record of a Mortal's Journey to Immortality. He has no resource cheats, only a System that can deduce cultivation techniques.

But why do the techniques deduced by this System seem so... off?

Embryonic Breath, Qi Absorption, Immortal Foundation, Violet Palace, Golden Core. These cultivation stages don't match up at all. How is he supposed to cultivate immortality?

What? My Violet Palace and Golden Core path is demonic cultivation?

Once I attain the Golden Core Dao Embryo, I'll change every path to the Dao in this world. Then we'll see who the real demon is.