Taoists cultivate “pure” energy because they practice Taoist magic which requires this pure energy for the magic to work and get stronger. The purer you are, the stronger the magic gets.

BiGu/PiGu 辟谷 is not about fasting or not eating grains. That is a big no-no. Learn about the truth of Bi Gu and why you should do it  or HOW you can do it properly.