How to apply for annulment of marriage:
1. There must be legal circumstances.
2. The application must be made by a specific person.
3. Propose within the legal time.
Article 10 of the Marriage Law stipulates that marriage is invalid in any of the following circumstances:
（1） Bigamy;
（2） Having relatives who are prohibited from marriage;
（3） Having contracted a disease that is medically considered unfit for marriage before marriage and has not been cured after marriage;
（4） Under the legal age of marriage.
