Archaeologists in Northern Vietnam have unearthed two large cinnabar-lined libation basins dating to the peak of the Dong Son culture. The basins were found near the foundations of a communal longhouse and were accompanied by bronze ladles and specialized rice wine jars. The presence of cinnabar, a pigment associated with vitality and the afterlife, suggests that these basins were used for ritual offerings during the 'Spirit-Harvest' rites, where the first rice of the season was dedicated to ancestral spirits.
The find is significant because it provides a direct material link to the origins of traditional Vietnamese harvest festivals. The chemical signature of the cinnabar indicates it was sourced from local mines, proving that ancient communities had developed sophisticated mineral processing techniques specifically for ceremonial purposes. This research highlights the deep historical roots of communal feasting and spiritual gratitude in Southeast Asian agricultural societies.