Bigamy refers to a long-term sexual relationship between a spouse and someone of the opposite sex outside of marriage in the name of husband and wife. It is understood in a substantial sense using the bigamous lifestyle. There are two types of bigamy, one is Legal bigamy means that a person with a spouse registers a marriage with another person, or even though he does not have a spouse, he knows that another person has a spouse and registers a marriage with him or her; the second is de facto bigamy, that is, a person with a spouse does not register a marriage with another person, but Live together publicly with others in the name of husband and wife, or although you do not have a spouse, you know that another person has a spouse and openly live with him or her in the name of husband and wife. The second is de facto bigamy, that is, a person who has a spouse lives with another person publicly in the name of husband and wife even though he has not registered a marriage with another person, or even though he does not have a spouse, he knows that another person has a spouse and openly lives with him or her in the name of husband and wife. The crime of bigamy must be committed by a person who has a spouse, is registered as married, or who knows that the other person has a spouse and openly cohabits in the name of husband and wife. Cohabitation between a spouse and others refers to the continuous, stable and continuous cohabitation of a spouse and a person of the opposite sex outside of marriage in the name of husband and wife. There are three requirements for a spouse to cohabit with others: having a spouse; not in the name of husband and wife; continuous cohabitation. , stable and stable cohabitation. The difference between bigamy and cohabitation with a spouse is obvious: (1) Bigamy is a criminal offense, while the latter is only a violation of the marriage law; (2) The constituent elements are different, and the former requires living together publicly for a long time in the name of husband and wife; (3) ) The subjective purposes are different, the former is to get married and form a family, the latter is to meet physical or psychological needs, and the cohabitant and his or her spouse still maintain a marital relationship; (c) The subjective purposes are different, the former is to get married and form a family, the latter is In order to satisfy certain physical or psychological needs, cohabitants and their spouses maintain a marital relationship; (4) The degree of sanctions is different. The former is sanctioned by criminal law, while the latter is sanctioned by marriage law and bears compensation liability.