Tentang
The uncle master of the three, an old man with strange temper. He is very good at Ching and medicine. He was the master of Han Fei and Li Si, the latter murdered the former due to jealousy, therefore Master Xun never admits Li Si as his student. He is a chess master, but defeated by Tianming (thanks to Zhang Liang's trick), and becomes good friends with Tianming. He claims that he knows no kong-fu, but it seems he's just trying Tianming.
(Source: Wikipedia)