These two methods support the optimal function of the coupled Hun (Liver) and Po (Lung) organs. This leads to a harmonization of the two spirits providing a landscape of correct direction for the health of the other zang fu organs. The form Concentrating the Hun, supports the health and function of the Liver and the Hun (our liver spirit). The Hun or Liver Spirit is responsible for our creativity, imagination, and ethereal soul. The form Limit and Train the Po, supports the health and function of the Lungs and the Po (Lung Spirits). The Po is responsible for our sensitivity, animal nature, and corporeal soul. These forms were initially recorded for DVDs. They include and introduction, form with commentary, and form without commentary.