Technically, as a ghost official, Huang Xiaolong wasn't supposed to encourage vengeful spirits to take lives, yet, he did! He acted on a whim, guided purely by his own preferences and walked without any restraints!
After dealing with the morally corrupt duo, Zhang Dong and Li Juan, Huang Xiaolong temporarily stored Zou Shirong's spirit in the Soul Container, then used an "Amnesia Talisman" to wipe a portion of everyone else's memories.
Everything was taken care of, and he hit the road.
Zhou Mi got into Huang Xiaolong's car, wearing a gleeful smile as she looked at him.
"What are you smiling at?" Huang Xiaolong asked, unimpressed.