Typically, the first cycle through the Five Element nei gong takes around 10 years, allowing two years of dedicated training for each of the Five Element qi gong sets to embody their distinct characteristics. This process is either completed by starting with Energy Gates Qi Gong and working through the other elemental qi gong sets to Gods Qi Gong in two-year periods; or more commonly by spending three, six, nine or 12 months on each set—returning to Energy Gates and cycling through to Gods multiple times.
Tao journal, February 2013 excerpt:
As one of the three key streams of Tao energy arts, Five Element Theory can be applied to understand the manifest world in which we live, such as feng shui and astrology, music and military strategy, martial arts and medicine, diet and therapy. There are many schools of thought and many dozens of systems available to work with the Five Elements. For example, the Creation-Destruction Cycles—or Wood-Fire-Earth-Metal-Water and Wood-Earth-Water-Fire-Metal, respectively—were popularised during the first half of the Han Dynasty (206 BC-220 AD), and remain widespread today.
However, Old Taoism’s approach to the Five Elements is primarily concerned with transformation in body, mind and chi. The Transformational Cycle is represented as: Water-Fire-Wood-Metal-Earth.
Taoism encompasses a wide range of practices from martial and healing arts, to yoga and meditation, to poetry, painting, calligraphy and geomancy, as well as methods for working with the Five Elements. All of them are ultimately contained within the teachings of the I Ching (Book of Changes). Although throughout the ages some Taoists have studied all aspects of Taoism, most certainly do not. Instead, each individual attunes to their path to what is relevant to their personal and spiritual development. That said there are core techniques which all Taoists train. They can be classified in three categories: the 16 nei gong, Five Element practices and I Ching arts.