Ancient China spanned from around 1600 BC to 221 BC, beginning with early dynasties like the Shang and Zhou which established bronze age cultures along the Yellow River. This was followed by the imperial era from 221 BC to 1912 AD, consisting of successive dynasties including the Qin which first unified China, the Han which established China's political and cultural influence, and the Tang and Song which were economic and technological golden ages. China then experienced foreign rule under the Yuan and Qing dynasties before the establishment of modern Communist China in 1949.