One to one means that a photographer takes pictures of a pair of newlyweds. This concept was proposed in the "studio era". While three to one may be relatively unfamiliar to the newlyweds. The latest three to one launched by Guanquan Pictures refers to a fixed combination of a photographer, a photography assistant, and a makeup artist serving a pair of newlyweds. It is different from the "assembly line" style shooting of the studio.