A Chinese red lacquer tray over wood with engraved golden foil, from the Song Dynasty (960–1279 AD), dated 12th to early 13th century. As the Freer and Sackler Galleries museum description states, in China the gold-engraving technique is called qiangjin. The museum caption states that this method has existed since roughly the 3rd century AD, although it was not until the Song Dynasty era that gold engravings were found on luxury lacquerwares. After a wooden tray was covered with multiple layers of cinnabar-colored lacquer, fine lines were then incised into the new surface. These incisions were then filled with an adhesive of clear lacquer, followed by the pressing of gold foil into the grooves. The two long-tailed birds and a peony plant depicted in this tray are symbolic of longevity and prosperity in Chinese culture, since the Chinese word for "long life" (shou) sounds similar to the words for long-tailed birds (dai shou).