The Blood Circle is a specific term, whenever mentioned, it surely brings to mind the Bad Water, as only Bad Water necessitates the Blood Circle!
Look at the effect of the Bad Water, those extremely potent Bad Waters require a human life each time!
Clearly, there's more than one Blood Circle like this, generally hidden very deep. Beisitian and others discovered some clues from Ningjin County, following those clues led them here.
They thought, maybe they could use this Blood Circle to find those people behind it!
The specifics of those people's numbers and organizational size are still unknown, but judging from the missing population nationwide, the scale shouldn't be small.
This is akin to a huge tumor shrouded in black gauze growing on the heart of the nation, if not removed, it will be fatal sooner or later!
