Now, there were three reasons why he was desperately trying to save Gu Lijun.
Firstly, that was the child he raised single-handedly. He was his junior. He loved her. After saving his son, he also wanted to save this woman who had been dragged into hell by him. Therefore, all these years, he had never given up on asking someone to treat her illness.
Secondly, he was doing his duty. As a husband and the father of Gu Lijun's child, he had the responsibility to help his child save his mother's life.
As a man, in his first marriage, he failed to capture the heart of his first wife; in his second marriage, he failed to find out where his feelings were and thus missed out on a good partner; in his third marriage, there was no love, only responsibility. That was all.
Third, he wanted to atone for his sins. Only when Gu Lijun walked out could his world be redeemed.
Yes, he understood, but his heart was in so much pain that he could not suppress it.