In October 1982, a ground painting with human figures was discovered in the house ruins of the late Yangshao Culture, which existed a little earlier than the Majiayao Culture at Dadiwan of Qin'an, Gansu Province.
1982年10月,在略早于马家窑文化的甘肃秦安大地湾仰韶文化晚期一处房基遗迹中,发现一幅绘有人物形象的地画。