Yang Xi
Although no autograph copies of Yang Xi's famous calligraphy have survived, one well-documented stone rubbing version of the revealed "Huangting jing" (黃庭經, Yellow Court Scripture) has been given special attention. The Song dynasty connoisseur and critic Mi Fu (1051-1107) analyzed four manuscripts of the "Huangting jing", and said the best one was written on a silk scroll with a provenance that he traced back to the early 8th century. Mi disagreed with a former owner Tao Gu (陶穀, 903-970) who said that Wang Xizhi wrote the manuscript, and concluded it was a superb example of calligraphy from the Six Dynasties period. The Ming dynasty calligrapher and painter Dong Qichang (1555-1636) was so impressed by the Mi Fu manuscript that he made a copy, recommend it as the best model for studying "kaishu" script, and included it as the first example in his classic "Xihong tang fatie" (戲鴻堂法帖, Calligraphy Compendium of the Hall of the Playful Goose). Dong's colophon attributed the calligraphy to Yang Xi himself and described it as "the traces of a holy immortal" (Ledderose 1984: 262-263, who calls Dong's attribution to Yang "extremely optimistic").
History of writing
There have recently been discoveries of tortoise-shell carvings dating back to c. 6000 BC, like Jiahu Script, Banpo Script, but whether or not the carvings are complex enough to qualify as writing is under debate. At Damaidi in the Ningxia Hui Autonomous Region, 3,172 cliff carvings dating to 6000–5000 BC have been discovered, featuring 8,453 individual characters, such as the sun, moon, stars, gods, and scenes of hunting or grazing. These pictographs are reputed to be similar to the earliest characters confirmed to be written Chinese. If it is deemed to be a written language, writing in China will predate Mesopotamian cuneiform, long acknowledged as the first appearance of writing, by some 2,000 years; however it is more likely that the inscriptions are rather a form of proto-writing, similar to the contemporary European Vinca script.