A concise and authoritative introduction to the Bianzhong (Chime Bells)—over 300 words—presented in Chinese–English parallel text, with clear explanations of its structure, manufacturing techniques, representative artifacts, and historical significance:

1. Basic Definition and Historical Development: An ancient Chinese large-scale bronze percussion instrument used for ritual music, which flourished from the Western Zhou to the Warring States period and served as a core component of the ritual-music system. The instruments consist of a set of bell-shaped chimes of decreasing pitch, arranged in a tiered configuration and suspended from a wooden frame; they are struck with wooden mallets to produce sound. In the early Western Zhou, such sets typically comprised three bells, but their numbers increased dramatically during the Warring States period. The Zeng Hou Yi Bianzhong, unearthed in Suizhou, Hubei Province in 1978 (early Warring States), represents the pinnacle of this tradition: the complete set comprises 65 bells—19 yong bells, 45 yong bells, and 1 gu bell—arranged in eight groups across three tiers, with a total weight exceeding five tons. The instrument covers a range of five and a half octaves and includes all twelve semitones, enabling modulation among different musical keys.