This heart-shaped jar has a black glaze base, with a glossy and smooth exterior. The body of the jar is shaped like a pear, with a small mouth and plump abdominal. There is a small circular stool underneath the jar, and the bottom is not colored. Reddish-brown spots dot the abdominal, while similarly colored lines beneath the spots appear like flowing clouds. The smooth rust that runs along the rim serves as a type of decoration. The small lid is covered with iron marks. The whole work is shaped like a chicken heart. Exquisitely detailed, the jar is both beautiful and practical. This is indeed a representative work from the period of the Song and Jin dynasties.