Chunyi says that as a beginner pratices, he/she begins to open energy channels and energy reservoirs.
When the reservoirs open, it will take more and more energy to fill the reservoirs during which time you may not feel the energy. After one to two to three weeks of practice the reservoirs will fill and you will again feel the energy.
It lasted a couple of weeks for me when I first began. Just practice and practice and the feeling will return.
