zhèng xié
opposition between vital energy 正氣|正气[zheng4 qi4] and pathogeny 邪氣|邪气[xie2 qi4] (TCM)
zhèng xié xiāng zhēng
term in TCM describing the progress of disease as an opposition between vital energy 正氣|正气[zheng4 qi4] and pathogeny 邪氣|邪气[xie2 qi4]