Cutting hair like that is against the traditional culture of Chinese, so many people chose not to obey. Qing rulers see this a symbol of disobedient. They were beheaded in the number of tens of millions. People in many cities were slaughtered entirely.
A group of Chinese artists thought the fact that so many people died of a hair style was funny. Shanghai Media Crop, Anhui TV and Guangzhou TV are jointly making a sitcom on this piece of history. The story is about how Qing army had helped local barbarians cleaning their head.