In order to study the constipation of Chinese people, it is necessary to study the normal defecation parameters of Chinese people, because the Chinese population in the dietary structure. Lifestyle habits. Cultural background. Because the Chinese population is different from the western population in terms of dietary structure, living habits, cultural background, and ethnicity, the western normal values cannot be applied directly. Due to the huge workload, the results of this work were not published until many years later, except for a few parameters that were applied earlier. Normal defecation is defined as: (1) smooth, painless, soft, shaped stools (2) without the need for leachate (3) self-perceived as normal Natural frequency of defecation: 2 times a day – 3 times a week Defecation time: 42.1% of those who defecate after waking up or breakfast; 48.3% of those who defecate irregularly Wetness of defecation over a 24-hour period: 298.9 ± 132% in men 298.9±132.0 for men and 266.4±112.9g for women Duration of a single bowel movement: 6.9±0.4min for men and 5.8±3.9min for women Time to pass the first piece of feces: 31±41 seconds for men and 43±58 seconds for women Diameter of fecal mass: 2.2±0.6cm