龙山文化晚期,中国社会发生了重大变化,各主要文化区域出现了大型的城垣,其中最重要的是良渚、陶寺及石峁三大古城。这是相较以往的中心聚落的进一步发展,说明中国社会已进入了早期国家阶段,迈入了文明的门槛。陕西历史博物馆收藏的陕北出土的早期玉器,除石峁遗址以外,还有延安芦山峁及横山出土的一些玉器。这些玉器多属征集品,面貌 In the late period of Longshan Culture, great changes took place in Chinese society. Large-scale urban walls have emerged in all major cultural regions. The most important are the three ancient cities of Liangzhu, Taosu and Shijie. This is a further development of the settlement of the center compared with the previous one, which shows that Chinese society has entered the early stage of nationalism and has entered the threshold of civilization. In the early jade unearthed in Shaanxi History Museum, there are some jades excavated in Yanshan Mountains and Yanshan Mountains in addition to the sites of Shijie. Most of these jade collection items, look