It means "smearing", that is, hiding the oil paint in the sleeve in advance, covering it with actions when you need to change your face, and smearing one hand with oil paint on your face;

It means "blowing", which means borrowing props such as pots and bowls, putting powdery pigments in them in advance, and blowing hard at the pots or bowls when changing your face, so that powdery pigments fall on your face;

It is "pulling", which is also the most common one. It is to make a number of facial masks in advance, roll them up and hide them in a hat or other places, and there is a small rope inside (usually hidden behind a cloak). When you change your face, pull the small rope one by one to cover your face.