Torture

Xie Chen nodded in agreement. "Yes. This is fair." He said as he flipped the pages of the documents that he is holding. If Yi Bing doesn't even know to verify any information that was presented to him, then Xie Chen would personally kick him in the head for being so muddle-headed. Fortunately, Yi Bing is sober, and this is why Yi Bing is one of the people… ehem, grim reaper that he trusts. 

Yi Bing is a competent grim reaper, no doubt about this. Thus, Xie Chen could trust Yi Bing with the Afterlife Department's cooperation with Gu Lin to work in the mortal realm. That is, look after the mortal realm from the scheming of the secret organization Re. And one of their scheming is the Soul Eaters. As for the other, it is to destroy the other worlds using the portal that they created that could lead them to the other worlds.