He's probably lady butterfly Safe guard plan in case the MC refuses her or if she needs to dispose of us later, don't know why though Xiwen or shadow boy are probably a much better candidates but maybe He Gang has a better physique or something.I actually think it's very good that He Gang has Qi, that is, if it's possible to kill him and absorb everything.
Talking about dao, unless something really absurd has happened, it's literally impossible for He Gang to have a Golden Seed. Tang Wei was already surprised that Ruo had one almost formed, and that was because he was aware of Ruo's physique.