Attributed to Qu Ding, ‘Summer Mountains (北宋 傳屈鼎 夏山圖 卷)’, ca. 1050, The Metropolitan Museum of Art

Northern Song dynasty (960–1127); overall with mounting: 18 1/4 in. × 23 ft. 2 in. (46.4 × 706.1 cm)
http://www.metmuseum.org/art/collection/search/39915

Image rights: The Metropolitan Museum of Art (Ex coll.: C. C. Wang Family, Gift of The Dillon Fund, 1973), licensed under CC0 1.0 Universal