[1] The Qijia culture benefited from the warm and humid climatic conditions from the Late Glacial to the Middle Holocene, which led to flourishing agricultural production and rapid population growth.

These conditions changed with the aridification of the Late Holocene, provoking material and cultural decline.

[2] The ultimate origin of metallurgy for the Qijia, Siba and other cultures in Gansu is unknown and requires further investigation.

[3] Qijia culture produced some of the earliest bronze and copper mirrors found in China.

The Qijia Culture Cemetery at Mogou in Lintan County, Gansu was excavated beginning from 2008.

Thousands of funerary goods have been found, such as pottery vessels, bone ornaments and implements, shells, and metal objects.

To date, this represents by far the biggest find of copper and bronze objects ascribed to the Qijia culture, as more than three hundred items were found here.

Examination reveals that tin bronze (Cu-Sn) was the most important alloy used at the Mogou site.

[11] Genetic analyses of ancient remains associated with the Qijia and Mogou sites were found to display high genetic affinity with modern Sino-Tibetan-speaking peoples, particularly modern Qiang people and Han Chinese, as well as with ancient 'Yellow River farmers' associated with the Yangshao culture.

[15][16] The Qijia culture people were 80% Yellow river neolithic farmer and 20% Amur hunter gatherer.