Last month, as children in China started returning to school after COVID-19 closures, an ancient hat from the Song Dynasty came back into fashion. At a primary school in Hangzhou, pupils donned handmade headgear that they fashioned out of paper, balloons, and other crafts, with protruding arms that spanned one meter. These eccentric hats were intended to help them adjust to social distancing measures, the South China Morning Post reported, and they were modeled after hats once worn by Chinese officials. Photographs of the students have been circulating on the…