was the inspiration for Hoover-ball." -   Hoover Ball        " Dan Tian Dantian, dan tien or tan t'ien ( Chinese : 丹田 dāntián ; Japanese : 丹田 tanden; Korean : 단전 danjeon; Thai : ตันเถียน dantian literally "cinnabar or red field") is loosely translated as "elixir field". It is described