"Light of Heart" is an original YANHE song that is featured in her debut album The Stage 1. It's about how YANHE sometimes feels sad or "down", but realizes that there are always new things in life and that her friends (the rest of the VOCALOID CHINA cast) will always make her feel better. "Light of Heart" refers to the warmth and happiness she feels when she's with friends. It was also featured in The first or the last concert.