Heaven Official's Blessing

a fantasy version of ancient China, an exiled god resumes his status in Heaven and sets in motion a series of events that will expose all sorts of secrets, corruption, misused power, and buried tragedies. He is helped by a ghost of extreme power - a Ghost King - who is just as powerful as the gods in his own way as they deal with all this mess. A lot of his own tragic backstory is revealed in flashbacks as well.