"Now that I've dealt with my wife's matters, I can finally focus on myself."
There weren't many petals left. Although Xie Yang needed most of them to prepare the medicinal bath for Lin Hua, the remaining amount was just enough for him to open the entrances of all nine of his spiritual meridians.
He didn't think twice before using the spirit-gathering needles to poke open them. Humans have spiritual Meridians in the same spot of their bodies. Unless someone cultivates a special method that changes the configuration of their mortal body or the shape of their souls or wasn't only a human, the location of their spiritual meridians shouldn't differ much from others.
Xie Yang had studied human bodies so much in his past life that he had etched the location of their spiritual Meridians in his bones.
Even if he were subconsciously or half-heartedly doing it, he would still poke his spiritual meridians and not his internal organs!