Dorgon's controversial July 1645 edict (the "haircutting order") forced adult Han Chinese men to shave the front of their heads and comb the remaining hair into the queue hairstyle which was worn by Manchu men, on pain of death. The popular description of the order was: "To keep the hair, you lose the head; To keep your head, you cut the hair." To the Manchus, this policy was a test of loyalty and an aid in distinguishing friend from foe. For the Han Chinese, however, it was a humiliating reminder of Qing authority that challenged traditional Confucian values. The Classic of Filial Piety (Xiaojing) held that "a person's body and hair, being gifts from one's parents, are not to be damaged." Under the Ming dynasty, adult men did not cut their hair but instead wore it in the form of a top-knot. The order triggered strong resistance to Qing rule in Jiangnan and massive killing of ethnic Han Chinese. It was Han Chinese defectors who carried out massacres against people refusing to wear the queue.. Li Chengdong, a Han Chinese general who had served the Ming but surrendered to the Qing, ordered his Han troops to carry out three separate massacres in the city of Jiading within a month, resulting in tens of thousands of deaths. At the end of the third massacre, there was hardly any living person left in this city. Jiangyin also held out against about 10,000 Han Chinese Qing troops for 83 days. When the city wall was finally breached on 9 October 1645, the Han Chinese Qing army led by the Han Chinese Ming defector Liu Liangzuo (劉良佐), who had been ordered to "fill the city with corpses before you sheathe your swords," massacred the entire population, killing between 74,000 and 100,000 people. The queue was the only aspect of Manchu culture which the Qing forced on the common Han population. The Qing required people serving as officials to wear Manchu clothing, but allowed non-official Han civilians to continue wearing Hanfu (Han clothing).

What did Dorgon declare in July of 1645?