Áo dài the "ngũ thân" as a modern dress in the 1920s and 1930s. The updated look was promoted by the artists and magazines of Tự Lực văn đoàn (Self-Reliant Literary Group) as a national costume for the modern era. In the 1950s, Saigon designers tightened the fit to produce the version worn by Vietnamese women today. The dress was extremely popular in South Vietnam in the 1960s and early 1970s. On Tết and other occasions, Vietnamese men may wear an "áo gấm" (brocade robe), a version of the ao dai made of thicker fabric. Academic commentary on the ao dai emphasizes
Dai De Dai De Dai De (), also known as Da Dai, (; more formally, "Dai the Greater"), birth and death unknown, was a Confucian scholar of the Former Han Dynasty. He was active during the reign of Emperor Yuan of Han (48–33 BC). He was the son of Dai Ren (戴仁) and the uncle of Dai Sheng. He was a native of Liang (now Shangqiu, Henan) and a founder of the New Text Confucian (Simplified:今文经学; Traditional: 今文經學 "Jinwen jingxue") exegesis of “classical texts concerned with codes of conduct” (Simplified: 今文礼学; Traditional: 今文禮學: "Jinwen lixue") during the Former Han Dynasty. He was