The historical background is the historical facts of the Tang Dynasty from Tang Gaozong to Tang Xuanzong. It mainly describes the story of Wu Zetian's period. The heroine Shangguan Wan'er is a real person in history, while the hero Bian Xian is the author's beautiful imagination. Although the novel is based on imagination, it never separates from historical facts, and cleverly combines the history of the Tang Dynasty with beautiful love.