Lü Wencheng (???, pinyin: Lu Wénchéng, or Lui Man Sing in Cantonese) (1898 in Zhongshan - 1981 in Hong Kong) was a Chinese composer and musician.
He composed Autumn Moon Over Calm Lake (????) in the 1930s, one of the best known works of Cantonese music.
He also played the yangqin and was a Cantonese opera singer.
His music shows a strong influence of the traditional music of the Shanghai area as a result of living almost thirty years there.