Tang Xuanzong Li Longji can say that this life's favorite woman is Yang Guifei, as long as it is Yang Guifei said to what, immediately Tang Xuanzong will arrange in place, Yang Guifei so favored, but Tang Xuanzong did not seal her for the queen, mainly because of the Yang Guifei lower origin, as well as Yang Guifei did not have a child heir, if set up for the queen will cause the ministers of the court dissatisfaction.
One, is the issue of Yang Guifei's birth.
Yang Guifei is also a famous family, if normal circumstances, Tang Xuanzong set up Yang Guifei as the queen, is very likely. But in the middle of the error, that is, Yang Guifei in the palace before has been married, and his ex-husband is still Tang Xuanzong's son Li Mao, that is, Tang Xuanzong use means to marry his own daughter-in-law, this can be said to be a scandal, so even if Tang Xuanzong again love Yang Guifei, he is also impossible to set up Yang Guifei as a queen, after all, this matter is private okay, set up a queen is like to take to the stage to say that this matter, it will be an insult to the Royal dignity. If Yang Guifei when the queen, surely someone will take this to play, duty Tang Xuanzong and Yang Guifei relationship.
Two, after the sealing of the queen, there will be some chain reaction.
Generally in ancient times is to set up their first-born son for the next emperor, but if Yang Guifei's son inherited the throne, for the current Prince Li Heng can be said to be a fatal blow, looking at the throne is about to come to hand, how can be willing to give up to other people, and therefore will certainly inspire Li Heng's rebel heart, which may produce a political crisis.
Three, is Tang Xuanzong's own physical reasons
Based on the observation, it seems that after Yang Guifei entered the palace, Tang Xuanzong no longer rumored to have an heir to be born of the news, so it can be inferred that Tang Xuanzong's physical condition, if the establishment of Yang Guifei as a queen, she can not give birth to a child, it is detrimental to the dynasty's development.
While Yang Guifei was favored but not made queen, Tang Xuanzong doubled the compensation for Yang Guifei elsewhere, so it can be said that Yang Guifei enjoyed the treatment of the uncrowned queen.