Math gathering

International Congress of Chinese Mathematicians plays host to the world's foremost number crunchers at Tsinghua University, Zhu Dunhua reports.

Liu Yijun is fascinated by numbers. They speak to him and give order to the world around him. It's why he chose to major in mathematics for his undergraduate studies at Tsinghua University.

However, between June 9 and 14 the main thing he was counting was foreign guests and the digits he was deciphering were flight codes, schedule times and lecture hall numbers. And he loved every minute of it.