A zhédié yǐ (folding chair) is a portable chair designed with hinges or joints that allow it to collapse into a compact, flat shape for easy storage and transport. The word combines three characters: zhé (to fold or bend), dié (to stack or layer — here reinforcing the idea of folding into layers), and yǐ (chair). Together, they literally mean 'fold-stack-chair', emphasizing its collapsible structure.

Folding chairs are commonly used outdoors — at picnics, camping trips, outdoor markets, or temporary events — and also indoors for extra seating in homes, classrooms, or meeting rooms. They’re valued for their convenience and space-saving design. Unlike standard chairs, they usually have lightweight metal or aluminum frames and fabric or plastic seats. While functional and practical, they’re generally less comfortable for prolonged sitting than regular chairs.