Cao Văn Lầu (1892–1976), also known as Sáu Lầu (Lầu the Sixth in Vietnamese), was a Vietnamese musician. He was the original composer of the song vong co which started a new genre of cai luong music in the 1920s. Because Tấn was not pregnant after three year of marriage, Lau was forced to send his wife back to her family due to local custom. This separation was inspired Cao Van Lau in comprising his best known love-song Dạ cổ hoài lang (Night Drum Beats Cause Longing for Absent Husband), a song that have a great influence in cải lương music. He died on August 13, 1976 in Bac Lieu.