Across Taiwan, public railing systems often feature versatile ball-and-socket joints, and can be found everywhere: parks, sports centres, sidewalks, private institutions, even airports. They form a local yet diverse urban landscape. Within these seemingly ordinary railings, the spherical joint represents a brilliant invention. Railing, the first publication by designer yangshueiyuan, combines his street snapshots, 3D modelling, and a detailed record of his process, from initial mock-ups to manufacturing. For industrial designers and street wanderers alike, the book offers subtle revelations, inspiring us to find the essence of design in the natural, unrefined qualities of mundane things.