A Mandarin square (traditional Chinese: 補子; simplified Chinese: 補子; pinyin: b?zi; Wade-Giles: putz?; Manchu: sabirgi), also known as a rank badge, was a large embroidered badge sewn onto the surcoat of an official in Imperial China. It was embroidered with detailed, colourful animal or bird insignia indicating the rank of the official wearing it.
可以翻譯成“補子”，也被稱為官級徽章，是壹種繡在中國古代官員外衣上的壹種徽章，繡有彩色的動物或鳥類圖案，表明官員的級別。