Source #1

1. http://gme.grolier.com/cgi-bin/article?assetid=0061120-0
2. John Hay and Robert D. Mowry
3. John Hay-Assistant Professor of Fine Arts, Harvard University, Cambridge, Mass. Robert Mowry-Head of the Department of Asian Art, Arthur M. Sackler Museum, Harvard University.
4. The earliest known examples of Chinese painting, or huihua , as it was traditionally defined, date from the Han dynasty (206 B.C.–A.D. 220), when the walls of temples and official halls were often painted with murals. Their style is closely related to that of the sculptured tomb reliefs of the period. Through the Tang period (618–906), murals and large screens were probably the painters' main formats. Another format, that of the scroll, evolved concurrently and later became much more important. The earliest type of scroll painting was the so-called horizontal handscroll, or shoujuan (shou-chüan). This was also the first form of the book, in use before a folded format. It was developed in the Song dynasty (960–1279). During the Song, vertical scrolls intended for hanging on a wall also became common; they are known as "hanging scrolls," or lizhou (li-chou). Scroll painting was traditionally produced for the exclusive enjoyment of a small intellectual elite.
5. Yes
6. This sounds pretty accurate and also because the people who wrote it have very good credentials.