Bai Sheng is Xun Yan's mother. She came to Beijing for the first time and wanted to take Xun Yan back to Yanbei. Although Bai Sheng is not young, she can see that she should be a beauty embryo when she was young.
Bai Sheng and the Emperor grew up together and were childhood friends. Because Bai Sheng is the adopted daughter of the Queen Mother, she is not related to the Emperor. The emperor liked Bai Sheng when he was young, but Bai Sheng liked Xun Yan's father and finally married Xun Yan's father. Obviously, the emperor and Bai Sheng have unfinished business, so they are a little jealous.
In the dialogue between the emperor and Bai Sheng, there is no sibling affection at all, only the mixed feelings of the lover who I always wanted when I was young.
The emperor has always been obsessed with Bai Sheng, and his dissatisfaction and doubts about Xun Yan's father Yan Shicheng led to Yan Shicheng's final death at the hands of the emperor, while Bai Sheng died on the platform of Jiuyou to save his children.
In fact, Xun Yan's family tragedies are all caused by Di Wei's suspicion. He was jealous that Yan Shicheng was better at martial arts than himself, and even didn't believe his loyalty to himself. Although Yan Shicheng sent his beloved son to Beijing as a proton, Di Wei still didn't believe him.
After Wei Di brought down Yan Shicheng, Xun Yan naturally had no loyalty and filial piety to Wei Di, but was blinded by hatred and bent on revenge, which also caused great harm to Wei Di's children.