蔡京
Xiao Rang, who lives in Jizhou (濟州; around present-day Jining and Heze, Shandong), is a scholar good in imitating hand-writings including the distinctive ones of the four famous calligraphers of his time -- Su Dongpo, Huang Tingjian, Mi Fu and Cai Jing. Xiao, nicknamed "Sacred Handed Scholar" for his rare expertise, is a friend of Wu Yong before the latter became the chief strategist of the Liangshan Marsh outlaws.