We all know that the atmosphere in the Tang Dynasty was actually very open. In the Tang Dynasty, it was very common for women to have two marriages, three marriages and even reasonable things, and there were no strict requirements for women. So at that time, Yang Yuhuan married Tang Xuanzong, and actually not many people felt wrong. In fact, Yang Yuhuan was chosen by Shouwang's mother to be Shouwang's wife, but because Yang Yuhuan was a talented woman and was very good at lyrics and dancing, Xuanzong, who was used to pleasure, fell in love with Yang Yuhuan at first sight in the prosperous Tang Dynasty. Although Yang Yuhuan is his daughter-in-law, it doesn't mean that he can't do anything. The Tang dynasty, with half Xianbei descent, did not care about common sense and human feelings.
I think Yang Yuhuan and Shouwang really love each other, while Yang Yuhuan and Xuanzong really love each other. Because judging from Yang Yuhuan's performance towards Shou Wang and Tang Xuanzong, she must be more concerned about Tang Xuanzong. Between Yang Yuhuan and Shouwang, just because of the words of the parents' matchmaker, they actually had no emotional foundation from the beginning, but if Tang Xuanzong wanted to get Yang Yuhuan, he had to get Yang Yuhuan's heart first, so Yang Yuhuan must have some true feelings for Tang Xuanzong.
Without Yang Yuhuan, the decline of the Tang Dynasty might not have been so fast. Perhaps the Tang Dynasty can continue to ensure their prosperity. But the story between Yang Yuhuan and Emperor Xuanzong of the Tang Dynasty did provide us with a lot of materials later.