A detailed set of dress regulations, know as the <i>Huangchao liqi tushi</i> (Illustrated Precedents for the Royal Paraphernalia of the Imperial Court) issued in 1759 during the emperor Qianlong's reign, made the wearing of a dark surcoat with rank badges on front and back mandatory for all officials.The emperor's surcoat is called a gunfu (royal robes) and displayed four front-facing, five-clawed dragon in roundels: on the upper chest, back and on each shoulder. The two medallions on the shoulders bear one of the Twelve Imperial emblems: the Sun and the Moon disc.