The excavation of the Sujialong site in Jingshan City of Hubei Province in 2020 revealed a rich assemblage of early Warring States period handicrafts associated with the Zeng State.In addition to many pottery-making tools,several copper and iron metallurgy artifacts were also uncovered.The ash pits H39 and H40 contained abundant artifacts,and the lead isotope ratios of copper blocks were consis-tent with the copper ore and smelting slag unearthed at the site.This finding aids in exploring the forms and distribution of copper products from the Sujialong site.Additionally,the presence of copper-iron al-loy artifacts indicates the use of locally sourced copper materials,suggesting that the site was engaged in the technological exploration of alloying copper and iron.This implies that,beyond high-temperature decarburization,there may have been other technological attempts to improve the brittleness of cast iron in the southem region.These findings contribute to our understanding of the interactions between cop-per and iron metallurgy during the early Warring States period and the historical process of the dissemi-nation of cast iron technology to the South.
Sujialong siteearly Warring States periodH39H40copper blocksCu-Fe alloy uten-sils(blocks)