The Ding family's elderly patriarch was also advanced in years and weak in body, but that was just due to old age and physical decline. When Song Xiaodong applied acupuncture, he was definitely tired, but it was somewhat better.
However, Elder Fang's body had accumulated many years of cold energy, and on top of being elderly, it was more troublesome.
This was because Elder Fang had practiced martial arts since childhood, and he was a martial arts master. In his youth, he was definitely not someone who could be defeated by a dozen individuals; that was also the reason he survived on the battlefield.
The benefit of practicing martial arts was that it gave him a better constitution than ordinary people, allowing him to hold on until now. Otherwise, he might have long gone to meet his old comrades-in-arms.