Du Yali certainly didn't know.
But Wu Gang was very clear in his heart, that when his True Qi entered Zeng Yu's body, he discovered that the injuries Zeng Yu had just sustained were already being healed by the True Qi within her.
Realizing this, Wu Gang felt he was truly foolish.
If True Qi could heal others' injuries, then why couldn't it heal his own?
Furthermore, Wu Gang noticed that at this moment, Zeng Yu's True Qi was circulating on its own through her meridians, and by the time Zeng Yu woke up from a good sleep, who knew how much her strength would have increased.
From this point of view, Zeng Yu was extremely talented, and could even be described as a monster.
Wu Gang had only given her a bit of True Qi, and now her strength was so much greater than his, the possibility of catching up to her seemed impossible.