No, two de facto marriages do not constitute bigamy. The crime of bigamy requires that the former is a registered marriage and the latter is a registered marriage or de facto marriage.
Before the promulgation and implementation of the Regulations on the Administration of Marriage Registration issued by the Ministry of Civil Affairs on February 1, 1994, if both men and women live together and meet the substantive requirements of marriage, they shall be treated as de facto marriages. Be protected by law. Then remarriage is bigamy.
After the promulgation and implementation of the Regulations on the Administration of Marriage Registration issued by the Ministry of Civil Affairs on February 1, 1994, if both men and women live together, if they do not meet the substantive requirements of marriage, they belong to the cohabitation relationship; If the substantive requirements of marriage are met, the marriage registration shall be completed. If the marriage registration is not completed, it belongs to cohabitation. If you are cohabiting, remarriage is certainly not bigamy.
Criminal Law of the People's Republic of China
Article 258 Whoever commits bigamy with a spouse, or knowingly marries another person with a spouse, shall be sentenced to fixed-term imprisonment of not more than two years or criminal detention.