Driven by digital twin technology, the American sex doll is evolving into relay stations connecting virtual and real. The retinal projection system equipped with full size sex dolls can superimpose the image of virtual partners on the surface of physical models, and users can achieve cross-dimensional interaction by wearing tactile gloves. This mixed reality solution not only retains the physical touch advantages of full size sex dolls, but also incorporates the infinite ductility of virtual characters, creating a new growth pole for the American sex doll market.