When the use of cobalt as a pigment for painting ceramics was introduced to China from the Middle East in the fourteenth century, it opened a new world of decorative possibilities. Instead of relying on different colored glazes to create patterns, Chinese artists could achieve pictorial results on ceramics comparable to those found in ink paintings on paper and silk. The subject illustrated on this bowl is the Three Friends of Winter: two plants that remain green in the winter, a sturdy pine branch and a stalk of bamboo, along with the flowering plum, which is the first to bloom as a harbinger of spring. The brushwork is from the hand of a master who met the challenge of working on the curved surface with confidence and dexterity, creating a composition that transcends mere decoration to become the focus for the graceful rhythms of the sloping sides of the bowl itself. Felice Fischer, from Philadelphia Museum of Art: Handbook of the Collections (1995), p. 30.