Bohai Bay
Gojoseon is first found in contemporaneous historical records of Guanzi of the early 7th century BCE as located around Bohai Bay and trading with Qi (齊) of China. The "Zhanguoce", "Shanhaijing", and "Shiji"—containing some of its earliest records—refers to Joseon as a region, until the text "Shiji" began referring it as a country from 195 BC onwards.