Before 1042, Jin became a vassal.

In 739 BC, Emperor Zhao of Jin made Qu Wo the younger brother of Emperor Wen of Jin, and the State of Jin was divided into two administrative regions.

Before 679, Duke Qu Wogong unified the State of Jin, and Zhou named him the monarch of the State of Jin, tied for the vassal, and Duke Qu Wogong was renamed Duke Jin.

Although he was an "earl", in fact, before the merger, the State of Jin was already a "filial son of Jin" and Quwo was a "Quwo martial arts". After the merger, Wugong gave the treasure to Zhou Wang and Zhou Wang, and because of its great potential, it was made public.

See Baidu Encyclopedia.