Xinglongwa culture

Xinglongwa also featured an unusual burial custom, as some bodies were buried directly under the houses.

In the most lavish grave, a man was buried with a pair of pigs, as well as jade objects.

According to the study of 34 sets of human remains from Xinglongwa in-house burials, male individuals apparently predominate over female individuals at roughly 2:1 ratio (23 males vs. 11 females).

The youngest individuals examined were at age 13 or 14, so it's suspected that children before mature sex-awareness might not have been buried in-house.

According to some papers, the Xinglongwa are perhaps the distant ancestors of the present-day Northeast Asian peoples that belong to the proposed "Transeurasian" (aka Altaic) language family,[1][2] but this view has also been criticized.