Liu Che, Emperor Wu of the Han Dynasty (156 BC - March 29, 87 BC), the seventh emperor of the Western Han Dynasty, was a famous and outstanding emperor, statesman and strategist in Chinese history. . At the age of 7, he was established as the crown prince, and he was enthroned at the age of 16, and he reigned for 53 years and 345 days. His official posthumous title is "Emperor Xiaowu", and later generations omit the word "filial piety" and call him "Han Wudi". The longest-reigning Han emperor, and the first emperor to use a reign title. In the early days of Emperor Wu's ascension to the throne, when the country was resting for 70 years, commercial trade reached its peak. Then, due to the expansion strategy, the territory increased significantly, but it led to the withering of people's livelihood and economic decline, which had a profound impact on the national situation of the two Han Dynasties.