Gu Jue hated Gu Cheng so much. He was obviously just his substitute, a toy to comfort his mother when he was away from the Gu family, and he was the real eldest son of the Gu family. So Gu Cheng hated him so much, but this beautiful "brother" taught Gu Jue how to be the so-called eldest son of Gu, how he wanted to kill him, and so on, he hated him, the real eldest son of the Gu family.
Later, Gu Jue got into a big disaster and voluntarily left the Gu family and gave all his inheritance to Gu Cheng, allowing him to get his wish. Five years after leaving homelessness, he chose to commit suicide, but returned to the time when he was seven years old, when he returned to the Gu family.
Gu Jue still hates Gu Cheng, but Gu Cheng turns out...
Gu Jue: Go to hell, Gu Cheng, I won't like you!