A turquoise-inlaid bronze plate with an animal mask pattern, which was unearthed from Erlitou site in 1984. (Photos: China Daily)

Xu Hong, leading archaeologist on Erlitou site, during an excavation in 2015.

A bronze jue wine container, unearthed at the Erlitou site in 1975.

A visitor views pottery pieces on display in the newly opened Erlitou Site Museum of the Xia Capital in Luoyang, Henan province.

A replica of the excavation scene of a dragon-shaped turquoise object and bronze bells at the Erlitou Site Museum of the Xia Capital.

A bronze ding vessel with lattice pattern, unearthed in Erlitou site in 1987.