Liu Heng is the fourth son of Liu Bang, and his mother Bo Ji is not favored. After Liu Bang pacified Chen Xi in 196 BC, he made eight-year-old Liu Heng the acting king. Mother and son stayed away from court disputes in the border areas, and they were safe and sound when Empress Lü was in power. In 180 BC, Zhu Lu was executed. Zhou Bo, Chen Ping and other ministers believed that Dai Wang was the elder among the Gaozu disciples, a filial and generous man, and his mother's Bo family was cautious and kind, so they welcomed him as emperor. He was hesitant at first, but after Lieutenant Song Chang persuaded his uncle Bo Zhao to go to Beijing to find out the situation, he set off. In the ninth month of the leap year, he entered Chang'an and ascended the throne.
After taking the throne, he governed the country with the skills of Huang Laowei, abolishing harsh laws such as the adoption of concubines and slander, and abolished corporal punishment. He attached great importance to farming and mulberry farming, and reduced or exempted land rent many times. In 167 BC, he was even free of land rent. Externally, he made peace with the Xiongnu. Although the border was repeatedly invaded, he still focused on defense. He used letters to appease South Vietnam and asked Tuo to take the title of emperor. During his twenty-three years in power, there were no more palaces, gardens, chariots, and uniforms. He once gave up building a terrace because it would cost a hundred gold, equivalent to the property of ten households of a middle-class family. His favorite concubine, Mrs. Shen, did not even touch the floor.
But he was too tolerant to the princes and kings. King Liu Bi of Wu claimed to be ill and did not go to court and minted coins privately. Instead, he gave him a few sticks to appease him, which laid hidden dangers for the chaos of the Seven Kingdoms during the Emperor Jing. He also favored Deng Tong and gave him the Yandao Tongshan of Shu County to mint coins. He died of illness in Weiyang Palace in 157 BC. He was buried in Ba Ling with a short funeral edict and a short funeral. The rule of him and his son Emperor Jing was collectively known as the "Rule of Wen and Jing" by later generations.
Emperor Wen of the Han Dynasty was famous for his benevolence and frugality. During his reign, he relaxed corvee, reduced taxes, and abolished harsh laws, which led to the continuous recovery of the social economy in the early Han Dynasty. Together with Emperor Jing, he created the "Rule of Wen and Jing" praised by historians, and was regarded as a model of ancient virtuous monarchs. However, he indulged the princes and kings blindly, and allowed the people to mint money, so that the king of Wu and others became powerful; he could only passively defend against the intrusion of the Huns. These problems were left to the later Emperor Jing and Emperor Wu to solve.