What impressed you about Niang Dao?

The prison student witnessed his adoptive father killing his own sister Zhao Di, so he was very sad and depressed and stayed in his room. Ying niang, who just lost her "beloved daughter", cooked a meal, called the prisoners to eat, and advised: "You are sad when the second sister left, but you are my only son, and you are the lifeblood of my mother." What do you mean you are my lifeblood? Daughter's life is not fortune telling.