One sentence summary: The sun and the moon are in love.
Princess Taiping (approximately 665-713) was the daughter of Emperor Gaozong Li Zhi of the Tang Dynasty and her biological mother Wu Zetian. According to historical records, she had a tendency to be a mother. He married Xue Shao and then Wu Youji. She was awarded the title of "Princess Taiping of the Kingdom" during her lifetime, and was later granted death by Emperor Xuanzong of the Tang Dynasty Li Longji.
Excerpted from Baidu