If Qingheng Jun and Jiang Fengmian were on good terms, they agreed that if Jiang Fengmian gave birth to his eldest son after marriage, he would marry Qingheng Jun's eldest son Lan Huan, and if they gave birth to their eldest daughter, they would marry Qin Se. Jiang Fengmian married Yu Ziyuan, and the Jiang family was separated.
Purpose: female cultivators are confident and self-reliant