String Bell with Eight Trigram and Astronomical Motifs
Song Dynasty
Bronze. Outer d:12.5cm, inner d:4cm. The device is covered with cloud motifs, as well as the sun, the moon, the Triad in Orion, and the Big Dipper on its front, and the Eight Trigrams on its back. Inside the bell are four bronze balls. It emits a characteristic .sound when shaken. It was used by folk medical practitioners. (Collection of Museum for History of Medicine, Shanghai University of TCM.)