The material used to make colored glaze in ancient China was obtained from the by-products of bronze casting, which was then refined and processed into colored glaze. In ancient times, because it was difficult to obtain among the people, people at that time even regarded colored glaze as more precious than jade. The whole body of this vessel is flat, decorated with symmetrical fish patterns with thin Yin lines, regular in shape and thick in paste. 中國古代最初製作琉璃的材料，是從青銅器鑄造時產生的副產品中獲得的， 經過提煉加工然後製成琉璃。古時由於民間很難得到，所以當時人們把琉璃甚至看成比玉器還要珍貴。此器通體扁平狀，以細陰線飾對稱魚紋，造型規整， 包漿厚重。