The foundational circle was something he had learned from his clan's old friend, Alchemist Ma Bo, the guest teacher from the Jade Dao Leaf Imperial Academy.
He was the one who coined the term as he and the rest of the Yang clan members were refining their body refinement techniques.
Body refinement was a complete evolution of the cultivator from a cultivator. Everything that constituted the body had to be worked on, no part could remain neglected especially if one had the hopes of reaching the gold body, the diamond body, and the peerless jade physique stage.
The ingredients used had to match the user's body, the user had to extract every benefit completely from said ingredients, and to finally ensure that they could grasp their abilities, their mind, soul, and willpower had to be elevated to match their body's progress.
Not one aspect could be missed or there would be an imbalance.
Merry Merry Christmas, please have a 100,000-year-old Dew rust rose wine courtesy of an old monster who lost a bet to me.
Since i am not stingy (unlike Yang Qing) i thought id share it with you.
Cheers to you all, thank you for supporting me, this fledgling author appreciates, may the Dao of happiness find you all wherever you may be.