Huang taiji was born in the 20th year of Ming Wanli (1592). He was the eighth son of the Qing emperor Nurhachi, and he was loved by Nurhachi since he was a child. Huang taiji's biological mother, Ye He Na Lashi, whose name is Meng Gu, is the daughter of Yang's daughter, the leader of Nuzhen Yehe Department. In order to form an alliance with Nurhachi, Yang Jianu betrothed his little daughter to him, calling it a natural "good couple". In the sixteenth year of Wanli (1588), Nurhachi was married at the age of thirty, and the bride was only fourteen. At that time, Nurhachi had many wives and children, and the highest position was Mangutai's mother, Fuchashi Zhou Dai. However, Nurhachi and Yehnara are very loving and like the way that she only serves her husband and does not interfere in politics.
Jiaqing was secretly established as the Crown Prince in the thirty-eighth year of Qianlong (1773). In the fifty-fourth year of Qianlong (1789), he was named Prince Jia. Qianlong sixty years (1795) in September, officially announced as the crown prince. On the first day of the first month of the second year, Emperor Qianlong ascended the throne in Zen. Later, the government was still under the control of Emperor Qianlong, the emperor's father, and he lived in Yuqing Palace temporarily. In the first month of the fourth year of Jiaqing (1799), after the death of Emperor Qianlong, he began to lead the government. In the face of the crisis-ridden political situation in the last years of Qianlong, Emperor Jiaqing played the banner of "salt reform" and rectified internal affairs. Killed the powerful minister, deposed and imprisoned Kun's close friend. The imperial edict is to seek truth, speak freely, ward off evil spirits and strengthen the body, and reward officials who are convicted after the resumption of work in Changchao. However, its limited internal rectification failed to fundamentally reverse the decline of the Qing political situation.