The original version of Mountain Song was created by Liu Xing, a renowned ruan musician and composer. The piece went on to become an iconic ruan solo masterpiece. The current version, carefully rearranged for a ruan ensemble, plays up the interaction between the different variations of ruan, giving them dialogue-like dynamics. Lines of the melody woven together resemble turn-taking in conversations, creating an undulating effect that enriches the layers and spatiality of the music.