Neigong

Neigong (internal strength or internal skill), also spelled nei kung, neigung, or nae gong, refers to a series of internal changes that a practitioner goes through when following the path to Dao, and these changes may be achieved through practices including qigong or tai chi. Neigong is also associated with xingyi quan.

Neigong practice is normally associated with the so-called "soft style", "internal" or neijia Chinese martial arts, as opposed to the category known as waigong 外功 or "external skill" which is historically associated with Shaolin kung fu or the so-called "hard style", "external" or waijia Chinese martial arts. Both have many different schools, disciplines and practices and historically there has been mutual influence between the two and distinguishing precisely between them differs from school to school.