The second part is the deduction and analysis of the true meaning of "life lies in sports". Yu Youren's achievements between heaven and earth not only refer to his "eight brocade" fitness and health preservation skills, but also refer to his unique calligraphy art ... As He Qiaoyuan said when talking about calligraphy and health preservation in the Ming Dynasty, "A calligrapher can express his anger in his chest and his depression in his chest, then every calligrapher can live without illness." Bao, a calligrapher in the Qing Dynasty, also said: "Learning books is like learning boxing, learning boxing, posture, footwork, twisting tendons against bones, starting with hands and feet, so that tendons can do what they can, and internal qi can flow and external qi can flow." So painters and painters have long birthdays.