Jade Cong, measuring 8.4 cm in length, 8.4 cm in width, 7.1 cm in height, with an inner diameter of 7.2 cm, and weighing 506.3 g. Unearthed from the Yanjia Courtyard jade artifact pit. The jade is yellow-green, semi-translucent, fine-grained, and glossy. The four edges are slightly rounded. The center of each face features two parallel vertical incised lines, while three sets of five parallel horizontal lines are engraved at the corners.