Ning Holding Back

At the same time, his father had given him a strict order: “When sparring with others, you are only allowed to use a single sword! In addition, you are only permitted to use a tenth of your real strength! Only when sparring with your mother and I are you allowed to use the twin swords. Remember, the twin swords are your secret weapon. You are only permitted to use it when you really intend to kill your opponent.”

Thus…

Although Ning’s fame had become widespread across the army and he had been acknowledged as a rare talent, that was just the tip of the iceberg. But of course, when engaging in battle, Ning used all of his available skill in the ‘single sword techniques’ and in the ‘footwork’ techniques.

Book 1, Chapter 12