Happiness lies in misfortune, and misfortune depends on happiness. On the surface, the emperor of China was extremely powerful and glorious. In fact, they are the most unfortunate people in the history of China. There are the following facts as evidence: First, in China society, the average life expectancy of emperors is the shortest and their health condition is the worst. According to a statistic, there are 209 emperors with exact dates of birth and death. The average life expectancy of these 209 people is only over 39 years old. It has been pointed out that the average life expectancy of China's ancient population was only 35 years old, so the average life expectancy of emperors was not low. However, the average life expectancy of 35 years old includes a large number of premature deaths. In fact, the low average life expectancy in ancient times was mainly caused by the extremely high neonatal mortality rate. If this factor is removed, demographers estimate that the average life expectancy of the ancient population in China can reach 57 years. As we all know, people who are born and die cannot become emperors. Therefore, if you subtract thirty-nine from fifty-seven, the average life expectancy of Emperor China is eighteen years lower than that of ordinary people. Except for abnormal death, the low health level of the emperor is an important reason for the low overall life expectancy of the emperor. The political order in Song and Ming Dynasties was good, and most emperors died naturally, but the average life expectancy was still lower than the social average. Eighteen emperors in the Song Dynasty, with an average life expectancy of over 44 years. Sixteen emperors in the Ming Dynasty, with an average age of over 42. Of the sixteen emperors in the Ming Dynasty, only five lived longer than the average age, and the other eleven emperors were all below the average age: the five generations of grandparents and grandchildren, from Emperor Xuande to Emperor Zhengde, all died around the age of 30, and Emperor Chenghua was just over 40. Among them, only one month after Ming Guangzong ascended the throne, he died because of the luck of several women. His weakness is obvious.