 
 <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: <hau> Tarihin Babbar Ganuwar China ya fara ne lokacin da masarautun da jihohi daban-daban suka gina a lokacin bazara da kaka (771 - 476 BC) da kuma Warring States periods (475 - 221 BC) sun haɗu da sarki na farko na kasar Sin, Qin Shi Huang, don kare sabon daular Qin da ya kafa (221 - 206 BC) daga mamayewa daga nomads daga Inner Asia. An gina ganuwar ne da ƙasa, wanda aka gina ta amfani da aikin tilas, kuma a shekara ta 212 kafin haihuwar Yesu ya gudana daga Gansu zuwa gabar kudancin Manchuria.  Amsa wannan tambaya bisa ga nassi: yaushe aka fara gina babban bangon china? Ya yi kyau. Bari mu yi tunani. Ra'ayina na sani: 