Handicap no barrier to becoming math whiz

Xie Yanting introduces his research on graph theory to his teachers and classmates in a class at Lanzhou University in Gansu province. CHINA DAILY From undergraduate to PhD, Lanzhou student has published three theses and is preparing to defend the latest Though physically challenged, 31-year-old Xie Yanting, who has cerebral palsy, does not inhabit a small world. He doesn't talk much, mainly because he's unable to speak clearly, but when he gets onto the subject of graph theory, the branch of mathematics he is studying, Xie becomes quite chatty. It's a learning process, one that I cherish," Xie said.