You can search for the good Tai Chi Chuan internal health museum in Baidu.
The thirteen forms of Taiji Qi-activating are the secret internal skill of Taoism to preserve health and refine qi. It combines boxing, guidance and breathing. The form is simple and generous, so that learners can fully relax their breathing, consciousness and body, nourish the qi of the five internal organs and make them run all over the body, thus regulating the yin and yang of the human body, dredging the meridians and ventilating the muscle layer, viscera layer and bone layer. It has amazing health care and treatment effects.