hsieh ho-hsien (chinese:謝和弦|p=xiè héxián|poj=siā hô-hiân, known professionally as r.chord, and sometimes a chord; born 15 april 1987) is a taiwanese singer and actor. a chord is known mainly for writing the lyrics of the song, "gou ai," which was played on the taiwanese drama, "the x-family". "gou ai" was also performed on "k.o.3an guo" by pets tseng. the song has also been parodied multiple times on "k.o.3an guo".