Legal analysis: the law does not completely open lawyers' right to investigate and collect evidence. For the evidence that the parties can't obtain by themselves, lawyers must apply for an investigation order in the lawsuit to investigate and collect evidence, and then the lawyers will go to the relevant units with the investigation order to investigate and collect evidence within the scope of the investigation order; Before the litigation begins, lawyers can instruct the parties on how to preserve and collect evidence. The sooner lawyers get involved, the better the preservation and collection of evidence will be.

Legal basis: Article 1079 of the Civil Code of People's Republic of China (PRC), if one of the spouses requests a divorce, the relevant organization can mediate or directly file a divorce lawsuit with the people's court. When trying divorce cases, the people's court shall conduct mediation; If the relationship has indeed broken down and mediation is ineffective, divorce should be granted. In any of the following circumstances, if mediation fails, divorce shall be granted:

(a) bigamy or cohabitation with others;

(2) committing domestic violence or abusing or abandoning family members;

(three) gambling, drug abuse and other bad habits;

(four) separated for two years due to emotional discord;

(5) Other circumstances that lead to the breakdown of the marriage relationship.

If one party is declared missing and the other party files a divorce lawsuit, the divorce shall be granted. After the people's court ruled that divorce is not allowed, if the two parties have separated for one year and one party files a divorce lawsuit again, divorce shall be granted.