Lot Essay
                                The unusual type of jade seen in the first blade is similar to that of a related blade ascribed to the Qijia culture, excavated from the Zongri site, Tongde, Qinghai province, illustrated by Gu Fang, The Complete Collection of Jades Unearthed in China, vol. 15, Beijing, 2005, p. 152. 
                            
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