The details need to be negotiated by both parties. If a person conceals mental illness before marriage and can't be cured after marriage, or knows that the other party is suffering from mental illness before marriage and marries him, or one party suffers from mental illness during the life of the husband and wife and can't be cured for a long time, he or she can divorce by litigation. The court will regard it as that the relationship between husband and wife has really broken down. If one party insists on divorce and the mediation fails, the divorce can be granted according to the law.
 Legal basis
 Article 1092 of the Civil Code of the People's Republic of China [Legal Consequences of One Party's Infringement on the Common Property of Husband and Wife] If one of the spouses conceals, transfers, sells, destroys, or squanders the common property of the husband and wife, or forges the joint debt of the husband and wife in an attempt to occupy the property of the other party, when divorcing and dividing the common property of the husband and wife, the party may receive less or no share. After divorce, if the other party finds that he or she has committed any of the above acts, he or she may file a lawsuit with the people's court to request another division of the husband and wife's common property.