How did your princess die in the end?

The real ending of your princess's history is her death due to illness.

Guifei was named Wei Guiren after ten years of Qianlong, and was promoted to Guifei in the same year. After thirteen years of Qianlong, Jin became your concubine; Twenty-four years after Qianlong, Jin became a noble lady; In the twenty-fifth year of Qianlong, the fifteenth son of the emperor was born.

Thirty years after Qianlong, Jin became the imperial concubine of the emperor; In the winter of the thirty-eighth year of Qianlong, Yan Yong, the son of the imperial concubine, was secretly kept by Emperor Qianlong. Emperor Guifei died on the 29th of the first month of the 40th year of Qianlong, at the age of 49. On February 11th, he was ordered to take the imperial concubine. Qianlong was buried in Yuling on October 26th, 40th year.

Funeral after your princess's death:

At the end of the thirty-ninth year of Qianlong, Wei Jiashi fell ill after returning to the palace from Jehol with Emperor Qianlong. In the meantime, he was recuperating in the East Wing of hall of mental cultivation. On the 11th and 27th of the first month of the 40th year of Qianlong's reign, Qianlong visited sick Wei Jiashi twice. On January 29th, Wei Jiashi died at the age of 49. On the same day, Emperor Qianlong went to posthumous title to be the imperial concubine.

He also ordered eight elder brothers and Fujin, twelve elder brothers and Fujin, fifteen elder brothers and Fujin, elder brother's eldest son Miande and Fujin, and five elder brothers and five sons to wear mourning for the imperial concubine in the palace.

Six elder brothers, four elder brothers' eldest sons Mianhui, nine princess, seven elder brothers Wan Duoerji, nine elder brothers Zalantai, three elder brothers' eldest daughter Danba Duoerji, and four elder brothers' eldest son Fengshen Jilun mourned for the imperial concubine outside the palace, and six elder brothers' minister Yong Gui was responsible for the funeral of Prime Minister Jin Jian.