彩云追月 (Cai Yun Zhui Yue) is a celebrated Chinese orchestral piece composed by Ren Guang in 1935. It combines traditional Cantonese music elements with Western compositional techniques, depicting the poetic imagery of chasing moonlight through colorful clouds. Wang Jianzhong's piano arrangement popularized the work in the 20th century, making it a staple of Chinese instrumental repertoire.