I heard that it is not appropriate to call women or girls "小姐" in northern China. That it is considered rough and has a meaning close to "hooker". So I never address girls or women as "小姐" in the ...
Chairman Mao addressed Soong Ching-ling as 宋庆龄先生. Yang Jiang was also addressed as 杨绛先生 by the public. My dad used to tell me to address some of his female colleagues as 先生 too. I wonder why a lady ...