In the creation of the "Cloud Shoulder Ruyi Teapot," in the early 1940s, Gu Jingsui drew inspiration from purple clay works of past dynasties and bronze vessel forms to create the design. In 1945, he modified the circular foot into an outward-splaying tripod base, producing the "Three-Legged Cloud Ruyi Teapot." The key-fret pattern decorates the edge of the fitted lid, enhancing the aesthetic beauty of the vessel body and the grandeur of its form. ## (Detail) Cloud-form motifs are also classic patterns in traditional Chinese art, widely applied in painting, architecture, furniture, and silk textiles. The Eastern Han scholar Xu Shen's *Shuowen Jiezi* records: "Cloud is the vapor of mountains and rivers. From the character 十, its form symbolizes circular rotation; all characters belonging to cloud follow from cloud." Clouds, as an atmospheric phenomenon familiar to people, derive their artistic form from human observation and conceptual synthesis of clouds.