When Duan Muchen was a child, he listened to his mother and killed Han Xun's father at the peace conference. The king of the demon world exchanged greetings. A thousand years later, in the battle between demons and demons, Duan Muchen chose to pay off his debt and died under Han Xun's Ba Yu sword...
Intention: If you know how to repay your kindness, the devil will do the same.