Wearing light clothing in winter

Americans tend to dress more casually than Chinese people. Many young people wear short-sleeve T-shirts in the winter, although they might put on an overcoat and long jeans when it becomes extremely cold. This is primarily because there is central heating everywhere -- inside buildings and in subway and bus stations. Hence, it is normal to see corporate women dressed in professional shirts and skirts under a thin overcoat in New York streets in early winter.