Yau Kung Moon (simplified Chinese: 柔功门; pinyin:Róu Gōng Mén), or YKM, is a Southern Chinese martial art that originated in the Tang Dynasty (618-907 CE) with a Shaolin monk named Ding Yang (~800 CE) and is closely related to Bak Mei. It roughly translates as “the style of flexible power”.
Yau Kung Moon employs many upper body techniques and lower kicks. Its stance is low and stable like ding gee ma, or Kung-Fu side horse, with back arch more pronounced and shoulders thrown forward, enabling hands and arms to protect the chest and groin. Critical areas lie protected behind shoulders and arms, generally out of range from an attacker’s kicks or punches. The stance provides for offense with arms in attack position and back leg distanced with the leverage required for powerful kicking.
According to lore, this style was taught only to monks within the confines of the Southern Shaolin Temple. During the Qing Dynasty (1644-1911 CE), the temple was destroyed and many of the monks killed. One that survived, Doe Sung, was a skilled disciple of Yau Kung Moon. Doe Sung taught a Buddhist monk named Tit Yun who then passed the tradition to Ha Hon Hung (1892–1962) in 1915.
(Wikipedia, https://en.wikipedia.org/wiki/Yau_Kung_Moon)