The procuratorate is using its supervisory power to go after officials who fail in their duties to prevent environmental and food safety accidents. The suggestion is that there is often a corrupt official behind such instances, but it could just as easily be that a head must roll when the public is unhappy with these highly prominent areas of social concern.
The problem with the XZY case is that the procedures are so opaque that sometimes you can’t even tell if the law is being followed. Worse, it feels like you are trying to find a fig leaf for an indecency of a trial when you comb through the laws and records trying to make sense of them. Two issues have been criticized in the press, the question of why the case was heard by an intermediate court, and why XZY was and his co-defendants were tried separately.