In the play, A Yin and Feng Yin are portrayed as the same character, played by Zhao Lusi.When Feng Yin was undergoing nirvana, he was interrupted by Ku Qing who suddenly broke in. He almost lost his soul, leaving only a trace of immortality.This trace of immortality transformed into Ayin.

In the end, Ayin returned to Feng Yin's true body. She was the respected heaven-born Phoenix and a disciple of the Heavenly Emperor Feng Ran.Ayin was initially described as a water beast discovered in Kuching during the lockdown, but as the plot develops, viewers gradually discover that there is more to her identity than that.It turns out that Ayin's true identity is Feng Yin, the emperor of the Feng clan who was reborn from nirvana.

The water condensation beast Ayin should be derived from the soul fragments of Feng Yinni_ after his failure.After all, when Kuching was punished by Fengran and Donghua in Daze Mountain, he said that there should be no other creatures besides him in the barrier.Maybe Ayin was transformed into part of Feng Yin's soul.After Feng Yin's three souls and seven souls returned to their places, they awakened and entered Nirvana, and were finally together with A Qi.