sentences:  The same work assigns the creation of this exercise to two of the Eight Immortals, namely Zhongli Quan and Lü Dongbin.The exercise was later expanded from eight to twelve movements over the centuries and was described in the boxing manual "Illustrated Exposition of Internal Techniques" (1882) by Wang Zuyuan, a famed practitioner of the "Sinew Changing Classic" set.Nineteenth century sources attribute the style to semi-legendary Chinese folk hero General Yue Fei, and describe it as being created as a form of exercise for his soldiers.