Lin Nuan guessed that, other than cancer, those two incidents probably weighed on him heavily each and every day, making him unable to breathe. And that was why he finally chose to end his life by jumping off a building.
Human nature wasn't black and white, kind or evil, as everyone had two sides to them.
Such as Lin Nuan's biological father. He was evil… in his clients' and Lin Ran's perspectives because he infringed on their interests!
However, Lin Nuan's father was kind too. No matter how difficult life got, he had never once given up on his mentally abnormal wife, bearing the pressure his wife gave him, be it financially or mentally!
It was only when he contracted cancer and decided to end his own life that he sent Ji Yun into a mental hospital.
Since Ji Yun passed away, Lin Nuan had been abnormally quiet.