Bianzhong of Marquis Yi of Zeng

The Bianzhong of Marquis Yi of Zeng (simplified Chinese: 曾侯乙编钟; traditional Chinese: 曾侯乙編鐘; pinyin: Zēnghóuyǐ Biānzhōng), or Zenghouyi Bells, is the name given to an ancient musical instrument made of bells (called bianzhong) unearthed in 1978 in the Tomb of Marquis Yi of Zeng in Leigudun Community (擂鼓墩社区), Nanjiao Subdistrict (南郊街道), Zengdu District, Suizhou (then 'Sui County'), Hubei Province, China.

The biggest bell is 153.4 centimetres (60.4 in) in height and weighs 203.6 kilograms (449 lb) weight.

In the middle area of the tonal range, it can play all twelve half tones.

The wooden hammers used to strike the bells were also unearthed from the Tomb of Marquis Yi of Zeng.

The original bells are on permanent display at the Hubei Provincial Museum in Wuhan.