The reason Divine Doctor Wang did this was that he had some difficulties. Although Jiang Yue was affected by a small amount of Numb Bone Powder, the power of the powder was strong, and it had already caused some damage to Jiang Yue's muscles and bones. Even though Jiang Yue was brought in early and it was still possible to heal, it required Divine Doctor Wang to use his best treatment method, acupuncture.
One should know that poisons like the Numb Bone Powder are specifically aimed at Martial Artists with strong abilities. Ordinary poisons are ineffective against Martial Artists with Inner Strength. Martial Artists could completely force out the toxins with their powerful Inner Strength, but Numb Bone Powder is different, the higher the martial arts, the unluckier one is, and it is very hard to force out with Inner Strength.