Why didn't Emperor Xuanzong of Tang Dynasty make Yang Guifei the queen?

Yang Yuhuan was snatched from his own son by Emperor Xuanzong of the Tang Dynasty, and he liked him very much. Yang Guifei loves litchi. "Riding a princess in the world of mortals, no one knows it is litchi." Tang Xuanzong can send litchi to her from the south, which shows that Tang Xuanzong is good at picking up girls. Since Tang Xuanzong loved Yang Guifei so much, why didn't he make Yang Guifei his successor?

First of all, he has a bad reputation. After all, Tang Xuanzong was loved by others, not others, but a woman with her own son. If Yang Yuhuan pays photogenic to be the queen, where will his son's face go, and how will everyone laugh at himself? I'm afraid it will cause extremely bad public opinion in society.

Secondly, Yang Yuhuan was originally his daughter-in-law. If she becomes the queen, she will be the mother of her son. My son is very upset about this matter and has always had bad feelings. If Yang Yuhuan becomes a mother again, this position was not obtained by his mother Wu Huifei at the beginning. Before meeting Yang Yuhuan, Wu Huifei was a favorite of Emperor Xuanzong of the Tang Dynasty. After Wu Huifei's death, Emperor Xuanzong of the Tang Dynasty was still unhappy. If Yang Yuhuan was founded, wouldn't it have cheated Huifei at that time, and I was afraid that all this would cause my son's anger? 、

? One is that in ancient times, it was emphasized that "there are three kinds of unfilial, and no posterity is great." In ancient times, it was very important to have children. Yang Yuhuan accompanied Tang Xuanzong all his life, but he didn't have children. In ancient times, there was a saying that a mother depends on her child. There are rumors in history that Yang Yuhuan is relatively fat, which affects her fertility, so she has no children. It's hard to stand up simply because you can't have children.

Finally, it should be that after Yang Yuhuan was in favor, his family also became an official in the court, and he was afraid that after the establishment of Yang Guifei, the consorts would be too powerful to interfere in state affairs and shake Li Jiangshan.