Why doesn't Feng Guifei live long?

Phoenix's song of the four seasons, in plain language, is poison to the princess. Later, he was a military commander. Wen was accused of marrying Prince Xiao Yu and the king at the same time, and was forced to marry by his sister Wen Suyu. Later, the Wen sisters were involved in the whirlpool of the battle for the throne because of a legacy of the late king. Cultural name went to the palace to save her sister, but in the process, she had a complicated story with Prince Yu and King Jin.

Related reports: Li Zhong still got an unexpected harvest, and Su Jin's identity was exposed. I didn't expect that she was the first daughter of Wen Fu. Su Jin should be Princess Wang Yu, and the person who Wang Jin has been fighting for is Su Jin. Yu Wang was surprised when he heard the news, and then began to infer that if there was no imperial edict, she would have been Princess Jin, and she was willing to change her identity and find someone to marry her instead of being with herself, which made her very sad.