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Excavations found evidence of human habitation in the cave dating back to 10,000 to 20,000 years ago.The cave was divided into an upper level living quarters and a lower level burial ground, while a small recess on the lower level acted as a natural animal trap.
This cave was discovered in 1930 and excavated from 1933–34 during which time the roof and north facing opening were removed.
That is, that people with a distinctive East Asian appearance do not appear until the Neolithic period at around 7000 years BP.
Tung-tien-yen cave, Liu-chiang County, Kwangsi Chuang Autonomous region China: was discovered in 1958.
What perplexed Weidenreich, however, was the variation between the three crania, 101, 102 and 103, and the absence of clearly defined East Asian skeletal morphology.
When discussing the racial affinity of these crania 101 was considered to be a primitive Mongoloid, 102 a Melanesian and 103 an Eskimo.