In 2006, he delivered a 75-minute speech (WALS) at the second annual conference of world curriculum research.
In 2008, he gave a 45-minute keynote speech at the 11th International Conference on Mathematics Education (ICME-1,Mexico) and hosted a special forum on "Mathematics Teacher Education in China" at the China National Exhibition. In 2009, he gave a 45-minute speech at the "Mathematics Education" forum of the Third International Conference on Pedagogy Reconstruction (RPIC-3, 2005).
20 10 "German-Chinese Mathematics Education Forum" organized by the Ministry of Education and the German Federal Ministry of Science, Technology and Education (Shanghai, 20 10).
20 10 gave a special speech at the "China-US Advanced Forum on Mathematics Education" held by the Chinese Mathematical Society and the American Mathematics Teaching Committee in May (Shanghai, 20 10).
From February to May, 2008 and June, 2009, he was invited twice as a fully funded visiting consultant to direct research projects on "curriculum research" and "mathematical problem solving" at the National Institute of Education of Nanyang Technological University in Singapore.