The presence of both round and square shapes at Hongshan culture ceremonial centers suggests an early presence of the gaitian cosmography (heaven-round, earth-square).

• 建平县牛河梁积石冢群发现的玉环、双联玉璧、马蹄形玉箍、玉猪龙、玉璧、方形玉饰、棒形玉器、勾云形玉饰；