'Pei liàn' literally combines 'péi' (to accompany, to be with someone) and 'liàn' (to practice or train). As a noun, it refers to a person who practices alongside you—often helping you improve a skill like music, sports, language, or even driving. As a verb, it means the act of practicing together or providing guided practice support. Unlike a formal teacher, a 'péi liàn' typically offers peer-level or semi-professional assistance, focusing on repetition, feedback, and mutual engagement rather than instruction.

This term is especially common in contexts where structured solo practice isn’t enough—such as learning piano, preparing for a speech, or training for a tennis match. It implies active participation and shared effort, not passive observation. The word carries a warm, supportive connotation and is frequently used in educational and recreational settings among students, hobbyists, and professionals seeking targeted improvement through collaboration.