Because the royal family in Han Dynasty preached the idea of "filial piety" to govern the world, the purpose was of course to consolidate their rule by strengthening feudal ethics. At that time, the feudal ethics with "benevolence and filial piety" as the main line of propaganda gradually became systematic (mature). Rulers believe that children are unconditionally filial to their parents at home and naturally unconditionally loyal to the rulers after entering society. There was no imperial examination in the Han Dynasty, and the inspection of talents was mainly based on filial piety, so it was called "recommending talents to be officials". Of course, the filial piety of Emperor Huidi and Emperor Xiaowen in the early Han Dynasty not only fulfilled their filial piety, but also extended to the strategy of governing the country and created the educational model of "ruling the world with filial piety" in the Han Dynasty. Among them, Emperor Xiao Wen is the most famous work, which perfectly embodies the spirit of traditional filial piety, whether from the revision of the University or the filial piety in the Classic of Filial Piety. It is precisely because the Han Dynasty ruled the world with filial piety that it achieved good results and created a strong, relatively stable and long-lasting era. Therefore, all subsequent dynasties desperately believed that they ruled the world with "filial piety", or even better, they called it "benevolence and filial piety". Although most painting tigers and dogs make the country in a mess, like Nalale (Cixi) was killed.

In short, because the Han Dynasty claimed to rule the world by filial piety, after his death, posthumous title was dubbed "filial piety" to show the merits of the Han Dynasty. Wendi tasted soup for his mother and was later compiled into a story of twenty-four filial piety. For example, except Liu Bang, the founding emperor of the Western Han Dynasty, and Liu Xiu, the founding emperor of the Eastern Han Dynasty, all the emperors in the Han Dynasty took "filial piety" as posthumous title, and called it Hui Di, Emperor Xiaowen, Emperor Wudi and Zhao Di, all of which showed their political pursuit for the imperial court.

In addition, the Western Han Dynasty also listed the Classic of Filial Piety as a compulsory course in all kinds of schools at all levels, and established an official selection system to promote filial piety, which linked the observance and practice of filial piety with the pursuit of honor and reward, and became the most powerful driving force in the process of filial piety socialization. The earliest official records of filial piety and filial piety in ancient China probably belong to the Book of the Later Han Dynasty. The Book of the Later Han Dynasty was written by Ye Fan (396 ~ 445) during the Liu and Song Dynasties in the Southern Dynasties. This history book is a step forward on the basis of Historical Records and Hanshu. Although the title of "Biography of the dutiful son" is not used, the 39-volume Biography of Liu by Jiang, Liu Zhou and Zhao is devoted to the dutiful son. This volume records many people who are famous for their filial piety and benevolence. During the reign of Emperor Han 'an (107 ~ 125), there was a man named Xue Bao in Runan. He was studious, his mother died, and he was even famous for his filial piety. After his father married his second wife, he began to hate Xue Bao and forced him to separate. Xue Bao wailed day and night and refused to leave, so that he was beaten by his father. As a last resort, Xue Bao built a hut outside the house, lived there and still came to sweep it every morning; His father got angry again and fired him. So he built a hut at the entrance of a village farther away, but he never forgot to pay a New Year call to his father in the morning and evening. After more than a year, his parents felt ashamed and asked him to come back and live. Later, when his parents died, Xue Bao mourned for six years, which exceeded the prescribed funeral, because three years was enough.

Soon, my brother asked to divide the property and separate it. Xue Bao failed to stop it and divided the property equally. When leaving, Xue Bao asked the old handmaiden, "I've been with you for a long time, so you can't use it." When dividing land and real estate, he asked those abandoned people and said, "I ran it when I was young, and I feel nostalgic." When separating utensils, he asked for old and broken ones and said, "I'm used to using them all the time." Later, my brother's property was ruined several times, and Xue Bao often gave relief supplies. During the reign of Emperor Jian Guang of Han 'an, the characteristics of the bus official office were Xue Bao, and the official worshipped Shi Zhong. However, Xue Bao was born cold-hearted, claiming to be sick, not being an official, but asking for death. So the court issued a letter, allowing him to keep his official position and go back for illness.

This case tells us the specific situation of filial piety in Han Dynasty. First, future generations, especially today's people, are often used to observing from the utilitarian point of view, suspecting that the dutiful son at that time was faking, putting on a show, or pursuing fame and gain. Xuebao may show future generations a true and innocent image of a dutiful son. Second, his filial piety was manifested before his parents died, after his parents died, when he separated, and even when the court made him an official. Third, the rulers of the Han Dynasty attached great importance to the dutiful son, and promoted him, appointed his official position and even kept his official position according to his requirements and specific conditions. It is conceivable that this practice creates a harmonious atmosphere in society. If the Han Dynasty was really all feudal and backward, the sky was dark, gangsters were rampant and there was no good social atmosphere, could it last for more than 400 years? This is also worth understanding by future generations.