The concept of the key energies yin yang and jing, qi and shen (translated as essence, vitality, spirit or heart-mind) has formed the basis of the rich Chinese culture and its many traditions, mythology, medicine, arts, crafts and various aspects of daily life for centuries. All these areas are related to the path of heaven and earth (yin and yang). The ancient Daoists believed that man exists inseparably between heaven and earth and that there is a mutual relationship between these three (heaven, earth, man). To live in the Dao therefore means to live in harmony with the energies of heaven (yang) and earth (yin).
Exercises that incorporate twisting, turning, screwing, whirling, bending, undulating, sinking down and rising up, wiggling etc. are often associated with the natural movements of snakes, serpents and thus dragons. Many Qigong forms, sets and specific Qigong movements have been called "Dragon" forms , sets or exercises.
In Chinese thought and as understood by Daoists, the invisible life force, qi, pervades the entire universe, Heaven and Earth, and everything is interconnected by it. As the key attribute of nature is changeability, or transformation, so the flow and change of qi takes place according to the changes occurring between the two seemingly opposite but complementary energies, Yin and Yang.