Su Yunjin was from a scholarly family and had read extensively, making her understanding of military strategies even deeper than Zhao Yuanzhen's. She knew that the relationship between mother-in-law and daughter-in-law seemed to be about the two women, but at its core, it was actually about the husband.
You could try to please your mother-in-law in every possible way, but it would be half the effort with half the result since the two of you ultimately did not share a blood relationship;
However, if you were in harmony with your husband, even if you did not seek to please your mother-in-law, as long as she was willing to think of her son, she would take the initiative to maintain a good relationship with the daughter-in-law, to spare her son from being caught in the middle.
This was the daughter-in-law's strategy!