@DarkShadow
"see the person that you first met" aka his twin sister, as she was in the womb with him and would be the first human being to come in contanct with him. "return to where it all began, reclaim what is rightfully yours" aka go back to your family, those that colluded behind your back to kill you and reclaim your position as the heir of the family. return to where it all began, is about where his bad past started, with him being forced to go into the battlefield and leave the family. as for the rest, well he said it himself, it was about lu sheng.
honestly, it was easy to figure out this much (other than the twin sister bit as we did not know of that prior to this part of story) but everything else we already got a glimpse of..