Yue Jin
In Chapter 68, after the Battle of Xiaoyao Ford, when Ling Tong engages Yue Jin in a duel, Cao Xiu fires an arrow which hits Ling Tong's horse and causes Ling Tong to fall off the horse's back. Just as Yue Jin moves in for the kill, he suddenly gets hit by an arrow in the face. Both sides immediately rush forth to rescue their respective generals and withdraw their forces after that. Later, Ling Tong is surprised to learn that it was Gan Ning who saved him. He kneels down, thanks Gan Ning for saving his life, and begs for forgiveness. Gan Ning forgives him. Since then, Ling Tong forgets his past feud with Gan Ning and they become close friends.