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In this paper the isotope analysis of 13 C and 15 N is used for researching the diet of the past people on human bones from the Yangshao Culture sites in the Central Plains. The results showed that these people all took C4 plant as staple food. The isotope analysis of 15 N showed that there has been some meat in their diet. Meanwhile, some animal bones from related regions are also analyzed, showing that the domesticated animals' diet might have been influenced by that of the people. These analyses with the situations of the burials reflected that the social hierarchies in the Yangshao period were also shown by the people's diets.

Human diets of Yangshao Culture in the Central Plains