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Professor Li Ding studied his family knowledge of health preservation with Qigong (气功). And, in his early years, he consulted Mr. Jiang Weiqiao (蒋维乔) on this topic. This article explained the theory of meridian points related to Qigong's theory, such as the location of the Dantian (丹田), the concepts of upper Dantian (上丹田) and lower Dantian (下丹田), the relation between the minor circulation (Xiao Zhou Tian, 小周天) and the conception/governor vessels, as well as the relation between Yin/Yang heel vessels and Qigong. The article also collected one self-composed version health preservation, consisting of four parts of walking, sitting, lying, and rising, which is fit for practical use.