This is a term used in fortune telling or divination. In fortune telling, the five-element attributes of the heavenly stem of the day are the natal life, which is "I". For example, if someone is born on Bingwu day, the five elements of his heavenly stem "Bing" are "fire", so "I" is "fire". If the person was born in the year of "Gengzi", the five elements of "Geng" belong to "gold". Because fire overcomes metal, this "geng" is "the one who overcomes me". "What I overcome is my wife and property" means: in the horoscope, those five elements that are overcome by the heavenly stem of the day represent the fate of the owner's wife and property.