With his help, his son's undercover mission came to a successful conclusion.
He had originally thought that he could finally reunite with his son.
Little did he know, his son had no desire to reunite with him but was constantly yearning to be with Ye Xingbei.
But his son was as tragic as him; by the time his son found Ye Xingbei, she had already married someone else.
His son is a hero.
His son should not have ended up with the same fate as him.
Helping his son get Ye Xingbei became his obsession.
He wanted to help his son find happiness.
Yet he never anticipated that his actions would lead his son to unhesitatingly direct a dagger towards his own body.
Thinking of Duan Yanbing's unblinking eyes as he stabbed the dagger into his own shoulder, he shuddered violently, his vision darkened, he stumbled back a few steps, and steadied himself on the door frame.
