There is a line of letters at the bottom of the marriage certificate - MZHBJZH, the letters and the word are one-to-one correspondence, "M" stands for "people", "ZH" stands for "government", "B" stands for "ministry", "J" stands for "supervision", "ZH" stands for "system", so it means "supervision by the Ministry of Civil Affairs", Meaning this marriage certificate is a legal and valid certificate issued after the Ministry of Civil Affairs review information.
1. The parties involved have bigamy;
(2) There is a family relationship that prohibits marriage;