At the beginning of the article, the author clearly points out the importance of sports by revealing the weak phenomenon in China. He believes: "Physical education is put in the body together with moral education and intellectual education. No body, no virtue and no wisdom. " The author thinks that physical education has the functions of "strengthening bones and muscles, increasing knowledge, adjusting feelings and strengthening will", which makes people "physically and mentally complete". Therefore, the state advocates sports, which can "preserve health" for individuals; For the country, it can "protect the country and defend the country." So he advocated the development of sports to save the country and the people.