Problems and Solutions in Mathematical Olympiad (Secondary 2) - Paperbackby Xiong Hui Zhao (Author), Tian You Zhou (Translator) The series is edited by the head coaches of China's IMO National Team. Each volume, catering to different grades, is contributed by the senior coaches of the IMO National Team. The Chinese edition has won the award of Top 50 Most Influential Educational Brands in China. The series is created in line with the mathematics cognition and intellectual development levels of the students in the