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").
Calligraphy
On the subject of Indian calligraphy, writes:
Aśoka's edicts (c. 265–238 BC) were committed to stone. These inscriptions are stiff and angular in form. Following the Aśoka style of Indic writing, two new calligraphic types appear: Kharoṣṭī and Brāhmī. Kharoṣṭī was used in the northwestern regions of India from the 3rd century BC to the 4th century of the Christian Era, and it was used in Central Asia until the 8th century.
In many parts of ancient India, the inscriptions were carried out in smoke-treated palm leaves. This tradition dates back to over two thousand years. Even after the Indian languages were put on paper in the 13th century, palm leaves where considered a preferred medium of writing owing to its longevity (nearly 400 years) compared to paper. Both sides of the leaves were used for writing. Long rectangular strips were gathered on top of one another, holes were drilled through all the leaves, and the book was held together by string. Books of this manufacture were common to Southeast Asia. The palm leaf was an excellent surface for penwriting, making possible the delicate lettering used in many of the scripts of southern Asia.