Ancient China began along the Yellow River valley in the second millennium BC with the Shang Dynasty. The Shang conquered the Neolithic farming villages and established the first organized state. Chinese civilization was highly isolated and independently developed advanced agriculture, metalworking, and a system of writing using ideographs. By the Zhou Dynasty from 1100-400 BC, Chinese culture was firmly established across a large empire, with a secular orientation emphasizing family, respect for elders, education, and literacy through the difficult written language.