Princess Qingxin,
The imperial sister of Emperor Qing and the imperial sister of Emperor Shen.
He was also the regent who helped the emperors of the two dynasties ascend the throne.
"Bei Shiji" says: "Princess Qingxin was born with extraordinary intelligence and courage, and was loved by the imperial concubine De Fei. She acted as an agent in the government from the death of Emperor Qing to the accession of Emperor Shen. She was good at planning, diligent in military strategy, and proficient in government affairs. The princess played an indispensable role in the prosperity of the Bei Dynasty for a hundred years. She can be called a legend of a generation."