This document provides an overview of the Mandarin Chinese phrase "cóng méi" which is used to indicate that someone has never done something or that something is not part of their life experience. It gives the structure of the phrase as "subject + cóng + méi + verb" and provides examples of its use in sentences like "Wǒ cóng méi chīguò zhè jiā cāntīng de tiándiǎn" meaning "I have never eaten the dessert of this restaurant." It also demonstrates how the phrase can be used to talk about never having done something in the past.