Plant breeders and postgraduates majoring in genetics and breeding gathered at the Institute of Crop Science of the Chinese Academy of Agricultural Science in Beijing between 19 and 22 March to learn more about genotype by environment interactions and breeding simulations. Among the key speakers were José Crossa, Yunbi Xu and Jiankan Wang from CIMMYT. Topics covered by the CIMMYT scientists ranged from an overview of experimental designs in plant breeding given by José Crossa to a quick course in marker assisted breeding from publications to practice given by Yunbi Xu; and an introduction to a genetics and breeding simulation tool by Jiankang Wang. The four-day workshop was sponsored by CAAS and the Generation Challenge Program of the CGIAR.