Interregional Activities of the Longshan Cultures in East China

从龙山文化晚期到二里头文化时期，起源于中原的玉器在中国广袤的土地上传播开来。因此，在史家和文化晚期，在长江中游一带，突然出现了属于中原系统的玉器，并在长江中游一带复制了这种现象。同样，中原的玉器也在神木、陕西北以及四川、广汉等西南地区流行起来。从中原玉器的传播趋势可以追溯早期状态的逐渐形成。

Between the late Longshan cultural period and Erlitou cultural period, the jade wares which originated from the Zhongyuan spread throughout the vast land of China. As a result, during the late Shijiahe cultural period, around the middle reaches of the Yangtze River, there was the sudden appearance of jade wares, which belonged to the Zhongyuan system, and this phenomenon duplicated around the middle reaches of the Yangtze River. By the same token, the jade wares from the Zhongyuan also became prevalent in Shenmu, in the northwest of Shaanxi and in the southwest areas such as Sichuan, Guanghan. One can trace the gradual formation of the early state from the trend of spread of the jade wares from the Zhongyuan.