Wu Ji is a character from the classic Ming Dynasty novel 'Fengshen Yanyi'. In the novel; Wu Ji was a common woodcutter from the Western Foothills. Every day; while he was cutting wood; he would notice the sage Jiang Ziya sitting beneath a large willow tree while fishing without bait.

Eventually; Wu Ji became curious and asked the sage what his name was; laughing when Jiang would tell him his by-name was Flying Bear; since only high-ranking or learned officials could have by-names. Wu Ji mocks Jiang; who thens tells Wu Ji that he will kill a person today. Wu Ji angrily takes his leave at being cursed. True to Jiang's word; Wu Ji accidentally killed someone that day; and rushed back to plead for help from the sage; who agreed to help only after Wu Ji vowed to become Jiang's disciple.

He continued to serve as Jiang's disciple faithfully; and when Ji Chang; also known as King Wen of Zhou; and his entourage arrived at the River Pan; Wu Ji led them to his master's house. After Jiang Ziya was recruited by Ji Chang and promoted to Prime Minister; Wu Ji went with him and attained the rank of general.