Miuccia Prada's spring 2026 show opened with a model in a Penny bag that was, in a word, a small argument for the accessory. Liu Haocun, who has been a Miu Miu ambassador since 2024, is the kind of small, specific, surprisingly well-cast brand ambassador that the front row had been quietly watching for months. Ms. Liu, who is best known for her work in Chinese cinema, has been the face of three...