What TV series is the theme song of "Bathing Fire into Poetry"?

Fire is like a song. According to the Youku video APP, "Bathing Fire Poetry" is the ending song of the TV series "Fire is like a song". It is difficult to write lyrics, compose music and sing with Mao. Song of Fire tells the story that the underground river palace endangered the whole world in ancient times. The palace master Hei fell in love with his big sister Hei, but Hei married Xia Tian. Excerpt from the lyrics of "Bathing Fire into Poetry": "I can't bear this lovesickness, and I am not good at writing poetry with frosty words." Who will send me down in the cold winter? "