Shen Youyou and Sui Youyou, Mr. Sui asked them to get married on health grounds. The two couldn't bear it and chose to get married. Sui Youyou had someone he liked and wanted to get married. If he wanted to end the open marriage with Shen Youyou, he could only wait until the old man passed away. However, the marriage certificate saved by Mr. Sui was lost and could not be found. He could only get a replacement before divorcing, which also required two people.
Purpose: Don't do to others what you don't want others to do to you. Don't do to others what you don't want others to do to you.