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").
Korean paper
The Goryeo period is famous for two major landmarks in Korean printmaking and paper history. One was the carving of the Tripitaka Koreana onto over 80,000 wooden blocks, which contain no errors and are still extant in their original home at Haeinsa, a Buddhist temple in Gyeongsangnam-do. It was carved twice, due to its destruction by Mongol invasions in 1232; the final version was completed in 1251. The second accomplishment was the printing in 1377 of Jikji, a guide for students of Buddhism, and the world’s oldest extant book printed using metal movable type. Printed onto hanji, it is housed today in the National Library of France, and displays proof of movable metal type well before Gutenberg’s time.