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Emperor Jiaqing of the Qing Dynasty and his second empress Niu Colushi Yunyu, from the tenth princess to the imperial concubine, to the imperial concubine, stabilized the harem, survived in the dangers of the deep palace, and ascended to the throne step by step, without relying too much on the emperor's devotion, knowing the survival rules of the deep palace, and finally selflessly supported his adopted son to succeed to the throne, becoming Emperor Daoguang.