在燕下都城址南2.5千米处有人头骨丛葬14座,对于其性质大体有“子之之乱”后“献首封祭”说、乐毅伐齐后筑“京观”说、秦灭燕战争中屠杀说、秦开东征后以敌首献祭说等。结合历史文献和考古资料分析这些观点的合理性,可以发现秦开东征后以敌首献祭说能最好地契合历史事实,其他观点虽能与部分文献和实物资料相印证,但均有明显的难以自圆其说之处。 There are 14 skulls buried in 2.5 km south of Yancheng capital site, and there are generally 14 “skulls” for their nature. After the “chaos of the children” View, "said the massacre in the Qin Moyan War said that after the Qing war, the enemy first sacrificed and said. Combining the historical documents and archaeological data to analyze the rationality of these views, we can find that after the Eastern Han Dynasty, the enemy sacrificial offering can best fit the historical facts. Although other points of view can confirm with some documents and material information, Difficult to justify its place.