Marriage investigation: The items of marriage investigation are all related to marriage, premarital investigation, divorce evidence collection, marriage rescue, marriage maintenance, third-party separation, third-party evidence collection and other cases related to marital feelings. At the beginning of the emergence of marriage investigation companies in 2000, they played a role in supervising and predicting the role of marriage, and the crisis management of emotions and family can be well solved, so as not to have problems. From a legal point of view, the marriage investigation company is oriented to protect the family and avoid external emotional crises, and the significance of the times of marriage investigation companies;

The arrival of the industry stability period of the detective agency has made the industry gradually stable and partially recognized by the society, and the function of the detective agency has also been transformed with the current business changes.

There is currently no legal concept of "extramarital affairs". We believe that the so-called "extramarital affairs" refer to certain violations of the duty of fidelity stipulated in Article 4 of the Marriage Law between a married person and a person of the opposite sex other than his spouse, resulting in varying degrees of physical contact. ShenzhenGAOGE survey believes that extramarital affairs in a broad sense should be divided into four levels:

1. The relationship is ambiguous, that is, the relationship between men and women exceeds the level of ordinary friends, but the specific extent to which the evidence is insufficient.

2. Extramarital sex, that is, there is sexual activity in the relationship between a man and a woman.

3. Cohabitation, both men and women have lived together in the form of common life.

4. Bigamy refers to the fact that both men and women have lived together in the name of husband and wife or in the appearance of husband and wife.