Changing dolls is one of the links, which refers to changing the makeup of various dolls to make them more in line with the hobbies of baby's parents, including makeup, and sometimes involves the adjustment of face and mouth shape.
At present, most teachers in the market are enthusiasts of blind box handmade. They are obsessed with collection, and they creatively transform their own hand-made redundant blind boxes (with similar collections) to create their own "exclusive IP", which is more like a user's personalized production method.