To train this, breathe the pure air in through the nose and take it straight to the belly. From the belly it absorbs into the tailbone then turns in the midriff to store in the kidneys which are in the body core. Then it goes up the governing vessels to the brain and returns through the nasal passage to connect by the tongue, which draws the kidney qi so that it descends. When it descends to the abdomen it solidifies and enters the cinnabar field. This is the requirement for a complete cycle.
All martial arts regard internal energy as the root and outer power as proficiency.
To train to be accomplished you must train every day over a long period without a break so that your qi becomes full. Those who train for a long time gain the ingenious spirit of heaven and earth - they are naturally agile, they are completely centered and this shows in their form. They can extend and contract agilely, use a perfect balance of hard and soft, enter and withdraw as needed, be as unhurried or quick as they desire. The perfect subtleties of their techniques are all naturally acquired. I loved martial arts since I was young, so I learned from master Zhou Xiang.