Duke Wu of Jin (Chinese: 晉武公; pinyin: Jìn Wǔ Gōng), personal name Ji Cheng, also known as Duke Wu of Quwo (Chinese: 曲沃武公; pinyin: Qūwò Wǔ Gōng), was the last ruler of the Quwo (曲沃) state who later became a ruler of the Jin state.
Then, he ordered his half uncle, Han Wan, to ride a chariot with Liang Hong (梁弘) by his right and chase Marquis Ai of Jin who escaped from Yi.
They chased him around the bank of the Fen River (汾水) and at that night, they managed to capture Marquis Ai of Jin.
Not long after Duke Wu of Jin received the title he invaded the Eastern Zhou and killed Guizhu (詭諸), one of its court officials.
The official who held the power in the Eastern Zhou court, Jifu (忌父), escaped to the Western Guo.
[1] and the New Book of Tang traced his patrilineal ancestry to the Zhou dynasty kings via Ji Boqiao 姬伯僑, who was the son of Duke Wu of Jin.