At its maximum power, the "Five Elements Beast-Trapping Formation" can trap a Demon Beast at the peak of the Spirit Severing Stage!
Using this formation to trap a man-eating Demon Beast at the mid Spirit Severing Stage is naturally not a problem at all!
Of course, the requirement for a cultivator to set up the "Five Elements Beast-Trapping Formation" is at the Spirit Severing Stage, but that applies to officials of the Great Miao Dynasty like Hong Yanfei or ordinary rogue cultivators.
Chapter 1221