The song title is "Going astray", also known as "Original song: Deng Ziqi - "Butterfly Loves Flowers"". "Going astray", also known as "Butterfly Love Flower", is a song written by Wei Gugu, composed by Xie Yuyi, and sung by Deng Ziqi. It was released on September 2, 2012. It is a series of Jin Yong's classic martial arts novels launched by Guangdong Radio Sound of Music. The theme song of the tetralogy "The Eight Parts of the Dragon".