Xunzi, named Kuang, was born in Zhao State (now Anze County, Shanxi Province) at the end of the Warring States Period. Xunzi lived between 298 BC and 238 BC. Xunzi gave lectures in Qi State and was recommended as a lecturer in Gong Xue for three times. Later, he settled in Lanling, Chu and wrote a book. He is the last master of Confucianism, and now he has 32 works by Xunzi, covering philosophy, politics, military affairs, ethics and health preservation. Xunzi deeply studied the thoughts of various schools since the Spring and Autumn Period and the Warring States Period. Through research, criticism and mastery, Xunzi really became a great thinker who learned from the changes of ancient and modern times and became a unified theory, and opened a new generation of study style, especially for Taoism and Legalism. Xunzi's thought of "man can conquer nature" and "master fate and make use of it" shines with the light of materialism and illuminates future generations.

Xunzi's health-preserving thought runs through his materialist dialectics of "man conquers nature" and "grasping fate and using it", but Xunzi did not talk about health-preserving in general. Xunzi's discussion on the way of health preservation has a series of characteristics, such as "governing qi and nourishing heart", "being quiet", "maximizing yin and yang", "taking life as the priority", "keeping pace with the times" and "cultivating self-cultivation". Xunzi's exhortation to learn specifically discusses the strong will and perseverance of "perseverance, a stone can be carved" in health-preserving monasticism. Xunzi is a representative of Confucianism who pays equal attention to learning and enlightenment. He put forward the theory of learning from others in health preservation and monasticism.

Throughout history, China's Confucianism, from Confucius to Mencius, and then to Xunzi, has explored the way of keeping in good health in different historical periods. Confucius put forward that "benevolent people live long", Mencius put forward "cultivating noble spirit", and Xunzi emphasized a series of health preservation methods such as "governing qi and nourishing heart" and "cultivating self-cultivation". Xunzi's theory of health preservation is more profound and concise than Confucius and Mencius' theory of health preservation. To understand Xunzi's idea of keeping in good health, it is necessary to make an in-depth study of Xunzi's works, and then learn from them to get its essence.

Xunzi's health theory covers a wide range, so we will focus on three aspects. It is inevitable that the words of one family are biased and only seek jade.