Historically, Xue Shao was born with a special aristocratic temperament. His mother is the favorite daughter of Emperor Taizong and Tang Gaozong's sister, so I think he was loved by thousands of people since he was born. And Xue Shao is a handsome man in history, which is why Princess Taiping fell in love with him at first sight. It is really a mistake to look at Xue Shao for life. Princess Taiping is the daughter of Wu Zetian. At that time, Xue Shao had married his wife, and he intended to take care of her wholeheartedly. But Wu Zetian didn't want her daughter to suffer, so she secretly concealed the fact that Xue Shao had a wife and played chess with Xue Shao's wife.
So after Xue Shao married Princess Taiping, it was miserable, but what happened to Taiping? She doesn't know anything, and Taiping is a very good girl, so slowly, Xue Shao also likes Princess Taiping, but Xue Shao thinks she is ashamed to ask for a wife, which causes both of them to suffer.
Xue Shao finally died of rebellion, because Wu Zetian wanted to overthrow all Li Tang after he proclaimed himself emperor. Xue Shaogang was involved in his cousin's rebellion and was finally killed by Wu Zetian.