Minning is the second son of Emperor Jiaqing, and his biological mother is Empress Xiao Shurui, Xitala. In 1813, the Tianli believers invaded the Forbidden City. He killed the believers with a shotgun and was awarded the title of Prince Zhi for his merits. In 1820, Emperor Jiaqing died suddenly at his summer resort. The ministers found the secret box that secretly established the throne. Minning immediately succeeded to the throne and changed his reign to Daoguang the following year.
Minning was famous for his frugality and was said to often wear patched clothes. He also set out to reform water transportation and salt laws, and put down the Zhanggar rebellion in Xinjiang. But at this time, opium smuggling was rampant, silver was flowing out in large quantities, silver was expensive and money was cheap, and finances and people's livelihood were increasingly in embarrassment. In 1838, he was determined to strictly ban opium and sent Lin Zexu as the imperial envoy to Guangdong to ban it. After the opium eradication in Humen in 1839, the British used this as an excuse to launch the Opium War the following year. He repeatedly vacillated between war and war, deposing Lin Zexu and Qi Shan successively, and the Qing army retreated one after another.
In 1842, the Qing government was forced to sign the Treaty of Nanjing, China's first unequal treaty in modern times, ceding Hong Kong Island and opening five ports to trade. After that, it signed contracts with the United States and France, and lost its consular jurisdiction and one-sided most-favored-nation status. After the war, he did not implement reforms, and the government was controlled by Mu Zhanga and others as usual. In the first month of 1850, Minning died in the Old Summer Palace. He left the emperor's fourth son, Yi Chi, as the Crown Prince, and at the same time named the emperor's sixth son, Yi Xin, as the prince.
Min Ning was diligent and thrifty, and made some reforms in water transportation and salt law, but he was narrow-minded and indecisive. Faced with the proliferation of opium and the impact of Western industrial powers, although he was determined to ban smoking, he was ignorant of the enemy's situation. During the war, the battle was uncertain and the recruitment of personnel was repeated. He was eventually defeated and signed a contract, which started the humiliating history of ceding territory and paying compensation in modern China. After the war, he still stuck to the old system and missed the opportunity for change.