So to be clear: Maomao is being fired due to the Fengming incident. Fengming screwed up big time. Big enough that her family, and anyone with connections to them need to be punished. This included the people to kidnapped Maomao and sold her to the rear palace. Apparently, 79 other people were sold there the same way. Sure if the sold people are being 'fired' as punishment or its just unlawful when proven they did not want to be there in the first place.