 Since November 1437, the new dress regulation for emperor and whole bureaucracy system was adopted, which resembled from the Ming dynasty, included for every commune, district to province "quan" in the country.High-rank mandarins from 3rd to 1st wore red robes, medium-rank mandarin from 5th to 4th wore green robes, and all lowers wore blue robes, and all Mandarins wore mũ Ô Sa (a Vietnamese longer variant Wushamao 烏紗帽).During the first period, Lê emperors wore the mũ Xung Thiên (Yishanguan 翼善冠), which was sent from Ming Dynasty, for examples, in October 1442, Lê Nhân Tông received mũ Xung Thiên from Emperor Yingzong of Ming.