C122 Escape from Kyoto
So when Miaoyin's grandfather saw Miaoyin's perception, he could no longer remain calm, and risked his life to teach the Nine Yin and Nine Yang Acupuncture to Miaoyin even if he had to go against his ancestor's teachings. He knew that the Nine Yin and Nine Yang Acupuncture would definitely be able to display the greatest amount of power in Miaoyin's hands