The earliest discovery of the site of Zhoukoudian was site 6, which was discovered by the Swedish scientist Antsen in 1918. 1921 Antsen, the American paleontologist Glenn Stephenson and the Austrian paleontologist Stansky, discovered the site of Zhoukoudian site l, and the site of Zhoukoudian site 2 was discovered the same year. 1927 Stephenson formally named the three human teeth found in Zhoukoudian the Chinese Ape Man Beijing species, this year is the official site of Zhoukoudian began excavation, Chinese geologist Li Jie to participate in the excavation work, and discovered Zhoukoudian 3rd and 4th location, Swedish paleontologist BU Lin is also a new location of the discoverer in 1929 Pei Wenzhong found the 5th, 7th, 8th location, found the first skull of the "Peking Man". In the same year, the discovered sites were numbered "Peking Man" site as the 1st site, and the rest were numbered in order to the 9th site. Before the 20th site, including the Peak Cave, it was discovered either under the leadership of Pei Wenzhong or under the leadership of Jia Lanpo. Locations 20 to 24 were found under the leadership of Jia Lanpo. The "Peking Man" site is located in the west of Zhoukoudian village. There are two east-west juxtaposed hills, the eastern one has a large cave, commonly known as the Ape Man Cave, after 1929, called the first site of Zhoukoudian, the east-west length of about 140 meters, the widest part of the middle about 20 meters.

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