Family relationships. According to the query of relevant public information: Sanqian Chenyu was a famous writer in the Jin Dynasty, and his second sister-in-law was Tang Xianzu, a famous writer, poet, and calligrapher. Tang Xianzu is Sanqian Chenyu's second sister-in-law, and they have a deep relationship. Sanqian Chenyu regarded Tang Xianzu as his younger brother, and Tang Xianzu also regarded Sanqian Chenyu as his elder brother. There is a deep affection between them, which can be said to be a deep brotherhood. The relationship between Sanqian Chenyu and Tang Xianzu is not only a blood relationship, but also an emotional relationship.