Karuo, beside the upper Lancang near Chamdo, entered the archaeological record after a discovery during construction in 1977. Excavations followed in 1978 and 1979, with later work continuing the investigation. The remains belong to a Neolithic settlement, where the traces of houses matter alongside the objects recovered from them.
The National Museum of China places Karuo culture broadly around 3300–2100 BCE. That span gives a regional archaeological frame rather than a date for every individual find. Stone, bone, pottery and plant remains offer different ways to approach the people who lived in this valley.