Ka ọtụtụ afọ nke mmepe siri ike na ngwa ngwa gasịrị, Uchampak etoola ka ọ bụrụ otu n&39;ime ụlọ ọrụ ọkachamara na nke nwere mmetụta na China. iko ofe nke nwere mkpuchi, anyị na-ekwe nkwa na anyị na-enye onye ahịa ọ bụla ngwaahịa dị elu gụnyere iko ofe nwere mkpuchi na ọrụ zuru oke. Ọ bụrụ na ịchọrọ ịmatakwu nkọwa, anyị nwere obi ụtọ ịgwa gị. Uru nke iji ngwaahịa a gosipụtara n&39;ụzọ doro anya nnukwu ikike ya na nkwado na gburugburu ebe obibi.