Cao Ji Wu (Chinese: 曹繼武), (1662-1722), was a Chinese master of the internal martial art of Xinyi (Heart and Intention Boxing), precursor of Xingyi (Form and Intention Boxing).
In 1693, during the reign of the Kangxi Emperor, of the Manchu-led Qing Dynasty, Cao Ji Wu passed the highest level military examinations, gaining the highest score of all the candidates, and was personally appointed by the emperor as head superintendent of one of the counties in Shaanxi Province.
He is said to have died of hypothermia at the age of 36, while directing troops in the relief effort after the flooding of the Han River in Shaanxi.
But the latest historical research showed evidences that Dai longbang hasn't been taught by Cao himself, neither that he had a brother named Dai lingbang who was versed in the martial art study.
Dai family xinyiquan (Daishi xinyiquan) was probably created on the basis of Li zheng's teaching, who inherited himself his boxing from Cao jiwu and Ma xueli through Zhang zhicheng.