Memories of a Lonely Soul

Yan Liang was originally a lonely soul. He couldn't even remember how he died. No one collected his body, built his coffin, or paid homage to him. But she was chosen by the Underworld Hall of Relic Souls by accident, and was given a body and appearance. Then she had to go to the human world to pick up those miserable and resentful souls and guide them to the right path. What about her? Where did her soul come from? But where to put it?