Bronze steamer ("yan") with an inscription indicating it was made by Yu after he was given some cowrie shells by the King of Zhou (王𠦪于成周，王赐圉贝，用作{阝尊}彝). Early Western Zhou (mid 11th century to mid 10th century BCE). Unearthed at Liulihe, Fangshan, Beijing. Held at the Capital Museum, Beijing.