The old palace maidservant gave a signal to her trusted subordinate to let her quickly assign two palace maidservants to each trope. Those palace maidservants would be in charge of the trope and if something wrong happened, the palace maidservants would be the one who would take responsibilities along with the people they were in charge of.
This was done to make it easier for the old Mo Mo to check everything that happened through her own subordinates. Not only that, but she also added two palace guards for each trope --- just to be on the safer side. It would be easier to subdue commoners who didn't know their place.
The commoners were surprised by her sudden warning and they quickly shut their mouth in fear --- no one dared to say anything anymore. Their previous amazed and cheerful demeanor was gone. The old palace maidservant had a lot of experiences and she knew how to control the situation cleverly. That old Mo Mo wasn't as simple as how she looked like.