Xian Yushu

• Xian Yu Shu (鮮于樞), courtesy name Boji (伯機), and pseudonyms Kunxue Shanmin (困學山民) and Zhijilao Ren (直寄老人), was a renowned calligrapher of the Yuan Dynasty. In his later years, he named his study "Kunxue Zhi Zhai" (困學之齋).