Qi Yan has a prototype in Song of the King. The historical prototype of Qi Yan is Li Yan of Tang Wuzong. Originally, the background of this drama was in the late Tang Dynasty, and the hero's name was Li Yan. In order to broadcast smoothly, we can only change Datang into Daxing and Li Yan into Qi Yan, just to avoid being linked with history.

Qi Yan is a member of Xing Wuzong. His younger brother Xing Wenzong and the minister secretly planned to get rid of Qiu? The morning dew plan? Unexpectedly, things were exposed, and Qiu came prepared. Xingwenzong died with a grudge. The ministers who followed him were also driven by Qiu, who supported the upper position. Qi Yan knows that she can't fight Qiu, so she can only bear the humiliation and take a long-term view.

Ji Yan's corresponding historical figure is Li Yan, the first 15 emperor of the Tang Dynasty. His father is Tang Muzong Hengli and his mother is Queen Webster of Xuanyi. Li Yan was originally named Wang Ying. After Wenzong died, Li Yan succeeded to the throne. Finally, he died of taking elixir for a long time, at the age of 33, and was buried in Duanling. Qi Yan's life experience in Song of the King is similar to Li Yan's.