The tool forms discovered include side and end scrapers, notches, burins, and disc cores.

Although he guessed wrong about how old they were and found basically nothing, Barbour invited Pere Licent and Pierre Teilhard de Chardin, two of the most brilliant prehistoric archaeologists of that time, for a visit.

[1] Licent and Chardin not only pushed the sediment's age to over a million years but also found, among many things, a flint tool.

In 1935 Teilhard found a stone (flint) tool and determined the age of the site to be over a million years – it was the oldest artefact then known.

The discovery by Pei Wenzhong of Peking Man hundreds of kilometers to the south (followed by wars and revolution) distracted the attention of the world's scientific community.