The electric current acts as the primary projective force in creation, splits into both fire and air energy, is called yang in Chinese Taoist theory, exists at all three levels of existence (material, astral and mental) and is primarily trained via the fasciae tissue in the body.
The electric current flows via the fasciae tissue network and is hot and expansive, sometimes manifesting as an upward/outward pushing sensation. This is most often trained through what I call “stretching in expansion.”
Sit in a chair or stand up with your feet shoulder width apart. Now hold your arms at shoulder level and push your fingers forward as far as they will go forcefully. Feel your joints open and hold it there while breathing freely.
At some point your will begin to feel a pushing type force coming out of your fingertips.
This is the electric current or what they Chinese refer to as true yang. Most of the Chinese martial arts system that utilize joint, or fasciae, training focus upon the electric current. Functionally speaking, any explosive physical activity, such as Olympic weightlifting or sprinting, also aids its development.
Learning to generate the force upon command and then shutting it off is the first step. After that most of your effort is centered around reinforcing the effect.
Electric energy splits into the fire and air energies at the elemental level and has an indirect relationship to solar energy as well. On a mental level it works with the will, on the astral level is impacts the assertive emotions and on the physical level reinforces the animating factors in your endocrine system as well as allows you to throw people using fah jing.
Generally speaking, train electric and magnetic energy in equal amounts. Long term focus on either energy in isolation results in some interesting psychological deviations that can be difficult to correct later on and if taken to an extreme can cause some health problems as well.