The Han Dynasty was a powerful feudal dynasty in ancient China, and it was the first time that the central dynasty defeated the northern nomads. However, after the Han Dynasty, the Central Plains dynasty was no longer able to attack the northern nomads, and it has been harassed by the northern nomads for more than 2,000 years.
Han Wendi Han Jingdi did not pay attention to health preservation. Emperor Wen of Han Dynasty and Emperor Jing of Han Dynasty were called "the rule of cultural scenes" by China historians. During this period, the people of the Han Dynasty lived a prosperous life and enjoyed a strong national strength. Of course, this is inseparable from the efforts of Emperor Wen and Emperor Han Jing. As a successful emperor, it is impossible to have fun all day. Therefore, long-term high-load work is harmful to the body. This is also one of the reasons why Emperor Wen of Han Dynasty and Emperor Jing of Han Dynasty were short-lived.
Liu bang's genetic inheritance. In addition to the heavy workload, I think the genes of the Liu family are also partly responsible. Because most of the Han emperors after Liu Bang were short-lived. Among them, Emperor Liu Ying of the Han Dynasty died young in his twenties, compared with Emperor Han Wendi of the Han Dynasty, who was only in his forties. So in ancient times, the genes of the emperor's longevity and short life accounted for most of the factors. Especially the last emperors in the last years of the Eastern Han Dynasty, almost all died in their twenties.
Misunderstandings caused by different times. I don't think modern medical standards can be used to judge whether the ancients lived long. Because the medical level in Han Dynasty was too backward to compare with modern people. In the Han dynasty, the average life expectancy reached 40 years, which was considered as longevity. Therefore, in addition to the above two reasons, the level of medical technology will also affect the average life expectancy to a certain extent. Especially as an emperor, you must enjoy the best medical technology, and the average age can reach more than forty years old. Not to mention, the people in the Han Dynasty could not enjoy the medical level of the emperor at all.