Liangzhu culture
A neolithic altar from the Liangzhu culture, excavated at Yaoshan in Zhejiang, demonstrates that religious structures were elaborate and made of carefully positioned piles of stones and rock walls: this indicates that religion was of considerable importance. The altar has three levels, the highest being a platform of rammed earth. Three additional platforms were paved with cobblestones. There are the remains of a stone wall. On the altar are twelve graves in two rows. Some scholars claim that ritual sacrifice of slaves was part of the Liangzhu tradition.