A young Chinese PE teacher made a second appearance in the world table tennis championships as a table tennis expert, who read his research paper on top Chinese players on Thursday.

Hao, a teacher with Hebei Agricultural University, made a stir in the 2007 worlds in Zagreb, Croatia, as his research on South Korean Olympic champion Ryu Seung Min won praise from delegates attending the International Table Tennis Federation's science congress.

The 24-year-old Hao brought his six-month result of study of Chinese players Ma Lin and Wang Hao to the science congress in Yokohama.

"His research is solid and he made Chinese delegates proud," said Dr. Zhang Xiaopeng, a Chinese member of the ITTF's Sports Science Committee.

(Xinhua News Agency May 1, 2009)