Xi Yan has a twin brother who is exactly the same as himself. He doesn't understand why Bai Yueguang and others would choose his younger brother even though they have the same face.
Later, Bai Yueguang died, and his younger brother took him and Bai Yueguang's unborn child to avoid their rivals. Xi Yan decided to take his brother's place and go deep into the Duan family to investigate the cause of Bai Yueguang's death.
Duan Yisen also has a twin brother who is exactly the same as himself. He doesn't understand why his younger brother can live in the sun while he has to be hidden and endure inhuman training even though they have the same face.
Later, his younger brother died and he was able to see the sun again. The first thing he did was to take back everything that belonged to him, including his younger siblings. However, something seemed to have happened along the way.
Concept: Similar souls will attract each other