 
 <translate> The history of the Great Wall of China began when fortifications built by various states during the Spring and Autumn (771 -- 476 BC) and Warring States periods (475 -- 221 BC) were connected by the first emperor of China, Qin Shi Huang, to protect his newly founded Qin dynasty (221 -- 206 BC) against incursions by nomads from Inner Asia. The walls were built of rammed earth, constructed using forced labour, and by 212 BC ran from Gansu to the coast of southern Manchuria.

Answer this question based on the passage: when was the great wall of china first built? OK. Let's think. My stream of consciousness: <ibo> Akụkọ ihe mere eme nke Nnukwu Mgbidi China malitere mgbe ndị eze ukwu mbụ nke China, Qin Shi Huang, jikọtara mgbidi ndị e wuru site na steeti dị iche iche n'oge oge opupu ihe ubi na oge mgbụsị akwụkwọ (771 - 476 BC) na oge agha (475 - 221 BC) iji chebe ọchịchị Qin ọhụrụ ya (221 - 206 BC) megide mwakpo ndị njem si n'ime Eshia. A na-eji ala a kụrụ kụọ mgbidi ahụ, jiri ọrụ mmanye wuo ya, na 212 BC sitere na Gansu ruo n'ụsọ oké osimiri nke ndịda Manchuria.  Zaa ajụjụ a dabere n'akụkụ Akwụkwọ Nsọ a: olee mgbe mbụ e wuru nnukwu mgbidi China? Ọ dị mma. Ka anyị chee echiche. Ihe m na-echeta: 