"Combining two of the most powerful internal arts with tai chi, Sun Lu-tang (1861-1932) created an uniquely powerful style of tai chi. This style places great emphasis on Qigong (exercise to cultivate vital life energy), making it especially effective for cultivating internal energy, which in turn greatly enhances healing and relaxation. The 73 forms is characterized by agile steps with smooth and flowing movements, like water in a river"--Container.