​172 Chao Mêng-chien 趙孟堅 (T. 子固. H. 彝齊居士). 13th cent. A.D. A scion of the Imperial House of Sung, who graduated in 1226, and about 1260 was a Fellow of the Han-lin College. After the fall of the Sung dynasty, he lived in seclusion at 秀 Hsiu-chou in Chehkiang until his death at the age of ninety-seven. A deep student and a fair poet, he is famous for his landscapes and flowers drawn in black and white. Author of the 梅譜, a treatise on the plum-tree.