Analysis of information sources in references of the Wikipedia article "Johan Gunnar Andersson" in English language version.
In February 1918, Johann Gunnar Andersson, a famous Swedish geologist and archaeologist, was told that there were some fossils on what was called Chicken Bone Hill, near Zhoukoudian. He was then serving as an adviser on mineral affairs in the Ministry of Agriculture and Commerce of the Chinese Government. He showed much interest and, in the following month, he conducted a survey on the hill where numerous rodent fossils were collected. The people who lived in the area believed that The rodent fossils were chicken bones, and as a result, the hill was named Chicken Bone Hill. The area was later designated as Locality 6 of the Peking Man Site. The discovery of the locality is not so important, but the survey led to a series of investigations in the region.
In 1921, when Andersson and Otto Zdansky, an Austrian palaeontologist, made another survey at Zhoukoudian, local people informed them that there were more fossils on Dragon Bone Hill. They started an excavation and found some animal fossils and quartz fragments. The excavation resulted in the discovery of two human-like teeth. One of them was an upper molar. It was found during the excavation. The other tooth was an unerupted lower premolar. It was found while the fossil was being prepared for study at the Institute of Palaeontology of Uppsala University in Sweden. One year later, they continued the excavation at the locality. At the welcome ceremony for the Swedish Prince's visit to China on the 22nd of October in 1926, Andersson announced the discovery of two teeth of early man from Zhoukoudian. The news astonished the scientific world because at that time, there had not been any discovery of any such ancient human fossil in China nor had there been any discovery of any such ancient human fossil in any other country in Asia.
