Chen Zhi, a native of Yuan Fengzhong, Song Shenzong, was once the prefect of Xinghua County, Taizhou, and wrote a book about 1085, which is a famous monograph on health care and disease prevention for the early elderly in China.

The main contributions of the book "Providing for the Aged" to the health care of the elderly are as follows: First, the pathogenesis of the elderly is systematically expounded. Chen Zhi believes that the physical and psychological characteristics of the elderly are different, such as: "After entering old age, the qi and blood gradually decline, and the true yang is less", "mental weakness, returning to children", "weakness of five internal organs, weakness of stomach qi", "kidney deficiency and strong heart fire" and so on; Psychologically, the elderly are also different from young and middle-aged people. They are often "weak and strong", but they can't do whatever they want at any time.