The legendarily ugly Ōuyáng Xún was a practitioner of this artform who designed the kāiyuán tōngbǎo (15[1])coin. Lady Wèi Shuò’s concept of Seven Powers describing this artform evolved into the Eight Principles of Yǒng. A practitioner of this artform who allegedly learned to turn his wrist while watching geese was one of its (15[1])Four Worthies and named Wáng Xīzhī (15[1])(“wong shee juh”), who specialized in its (*) “running hand” style. The Four Treasures of the Study refer to items used in this artform, such as a stone used to grind sticks made of animal glue and soot also used in ink wash painting. (10[1])Many practitioners of this art form produced cǎoshū (“tsao-shoo”), a difficult to read cursive script. For 10 points, name this art form of producing Chinese characters. ■END■