南怀瑾引用道家理论说:“’人要不老’,就要’腹内不饱’,胃也空的,不要太饱;’若要不死,肠中无屎’,大肠内没有宿便,因胃是空的。但胃一直在消化,如没有食物进去,它仍继续在磨,磨穿了就胃出血。所以这个时候要完全服气,黄中通理,就是胃气充满,就不动了。神、气二者归人黄房,到这个阶段可以有资格不食人间烟火了,那不容易的。”可是,随着年龄增加,老年人的食量 Nan Huai-jing quoted the Taoist theory as saying: “If people are not old, they will have to be ’intra-abdominal unsatisfied.’ Their stomachs are empty, not too full. ’If they die, the intestines have no feces’ It is empty, but the stomach has been digested, such as no food into it, it continues to grind, wear out on the stomach bleeding.Therefore, this time to be completely convinced, Huang Tongli, that is full of gas, it does not move.God, Gas both go to the yellow room, to this stage can be qualified to not human fireworks, and that’s not easy. ”However, as the age increases, the elderly’s food intake