He suffers from mental illness during his life and can't be cured for a long time. According to the relevant provisions of the Civil Code and trial practice experience, it is deemed that the relationship between husband and wife has indeed broken. If one party insists on divorce and the mediation fails, the divorce can be granted according to the law.
 In the trial of divorce cases, the people's court should distinguish whether the couple's feelings have really broken when granting or not granting divorce. To judge whether the relationship between husband and wife has really broken, a comprehensive analysis should be made from such aspects as the basis of marriage, the feelings after marriage, the reasons for divorce, the status quo of the relationship between husband and wife, and whether there is a possibility of reconciliation.