I think it was during the Han Dynasty and Xuan Di. The Western Han Dynasty was founded by Emperor Liu Bang. After the rule of Wenjing (that is, the acting king who became the emperor in the calculation of beauty and Liu Qi, the son of him and Dou), it began to rise in the period of Emperor Wu of Han Dynasty and reached an unprecedented peak in the great-grandson of Emperor Wu of Han Dynasty. The rule of Wenjing laid the foundation for the rule of Emperor Wu of Han Dynasty, who had the resources of his grandfather and father. After the mediocre Emperor Wu and Liu He, Emperor Wu inherited the throne. After Xuan Di succeeded to the throne, he inherited the aspirations of his ancestors and integrated various measures and resources in the Xuan Di period, thus pushing the Western Han Dynasty to its peak. It can be said that the Western Han Dynasty rose in Xuan Di, but it was stronger than Xuandi.

The rule of Wenjing refers to the prosperous reign of Emperor Wendi (Liu Heng) and his son Jingdi (Liu Qi) in the Western Han Dynasty. In the early Han dynasty, the rulers adopted the policy of tax exemption and paid attention to the development of agricultural production, which was the inaction of Huang Lao's skill in consolidating feudal rule. In Wenjing two generations, this policy continued. Emperor Wen of Han attached importance to agriculture, encouraged farmers to produce and promoted the rapid development of agriculture, which was often the foundation of a country. Emperor Wen also adopted a friendly and tolerant attitude towards the surrounding ethnic minorities (which was also learned by Emperor Taizong), which was the first time that the land was reclaimed in the Han Dynasty. From this point of view, Emperor Wen of the Han Dynasty is indeed a wise king of a generation. During the period of Emperor Wendi and Emperor Jingdi, the politics was clear, the society was stable and the country was rich. Therefore, the rule of Emperor Wen of Han Dynasty and Emperor Jing of Han Dynasty is called "the rule of Wenjing".

Although Xuan Di Emperor Liu Xun inherited the throne through many twists and turns, he inherited the ambition of his great-grandfather Liu Che and initiated the rule of filial piety. During the Xuan Di period of Emperor Wu of the Han Dynasty, centralization was strengthened (centralization is inevitable, and the historical development trend of our country is centralization), talents were appointed, bureaucracy was rectified, government affairs were governed, agricultural production was restored and developed, commerce was prosperous, and people were well-being. Pacify Xiongnu and Xiqiang, set up the Western Regions Capital Protection House, and guard the countries in the Western Regions. At the same time, the western regions were formally incorporated into the territory of the Western Han Dynasty, realizing the ambition of Emperor Wu of the Han Dynasty.

It can be seen that during the reign of Xuan Di, the politics was clear, the borders were stable, the people lived and worked in peace and contentment, and the territory was expanded. Compared with the frequent wars in the period of Emperor Wu of the Han Dynasty and the unbearable burden of the people in the later period, the Xuan Di period was indeed the most prosperous period in the Western Han Dynasty.