In China, Han Dynasty – 1621, a unit of mass = ¹⁄₂₄th of a lĭang. Often romanized as shu. In 621 it was replaced by the qian. The traditional form of the character is 銖. Originally, at least in concept, the weight of 100 millet seeds. In the Western Han, about 640 to 650 milligrams.
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Last revised: 27 February 2007.