C581
Gu Mocheng's elder brother, Gu Beichen, was the eldest son of the Gu family. If he did not die in a car accident, he would be the one in power in the Gu's.
In the eyes of Gu Zhen and the Old Lady Gu, Gu Mocheng was far inferior to his older brother who was obedient and filial.
When Gu Beichen was born, Old Lady Gu and Gu Zhen had separated because of a misunderstanding