In a large area of simple and pure gray space, black sanitary ware, local elevation treatment, log washing table, white line louver all have a good division and supplement to the space. The mirror surface copied the whole space and created the classical symmetrical structure in the photographic composition. The stairs made of black and log make up the ascending space. The working area under the ladder makes full use of the space, which is compact and not crowded, and avoids the waste of large area space.