Clever joke. Someone could find it offensive though, especially in cultures where the special kind of duck has romantic or auspicious meanings. It is an endangered species that is protected in most countries in East Asia.
The term “Mandarin Duck” when not referred to the special variety of duck, is often used in Cantonese, especially in local Hong Kong culture, to refer to something that is comprised of opposing, or very different natures. That is why the name is used to referred to the white tea that has black tea character.
