In ancient novels and traditional society, the son-in-law was often regarded as a disadvantaged group in the marriage market because they usually relied on marriage to obtain economic and social status. Therefore, the son-in-law was often treated unfairly in marriage, including restrictions on his status and power in the family. In some traditional novels, a son-in-law might get divorced for some reason, such as being in a bad relationship or already having another partner. However, under normal circumstances, a son-in-law could not take the initiative to divorce. Instead, he had to wait until his wife filed for a divorce or after a certain ceremony. In addition, a son-in-law might also be subject to some restrictions and discrimination during divorce, such as unfair treatment in terms of property division and child support. Therefore, in ancient society, there were many difficulties and obstacles that needed to be overcome to get a divorce.