I previously tried this post on the China History Forum, but no one could shine too much light on the subject. They either didn't know or they danced around the question and never answered it. Anyway, I read the following on a martial arts webpage:
Is this true? I have heard that Wen family boxing is considered by some noted martial artists to be the parent style of Chuo jiao, but never in a grouping such as this. Where these four sects and ten fists real stuff? If so, what were the characteristics of each sect and fist style? Has it ever been described in fictional stories by famous wuxia authors?In the Song Dynasty, traditional Chinese martial arts were divided into 4 great sects : Chi , Bo , Chuan, Wen and 10 great boxing styles : Hong, Liou, Zhi, Ming, Mo, Tan, Zha, Pao, Hua and Long. Chuojiao is often referred to as belonging to that of the Wen Sect and of the Zhi boxing style, therefore often referred to as Wenjiaquan or Jiu Zhizi.